This topic describes how These ORDER BY clauses are independent and are When you need a generated ROW_NUMBER() on a SELECT … A window frame function uses a window frame to calculate things such as a moving average. window. Now, let’s write some SQL that will use the dense_rank() function in SQL Server and Oracle to find the rankings: Running the SQL above will return these results: Note that the ranking of the 4th row (with a salary of 100) is now 3 and not 4. in which rows enter and exit the sliding window. which divides the value in the current row by the sum of the values in all of the rows in a window. For example: However, GROUP BY is not as flexible as windowing. new month) is reached, the sliding window starts with only the first row in that partition: The query result includes additional comments showing how the MONTHLY_SLIDING_SUM_QUANTITY column was calculated: 450 Concard Drive, San Mateo, CA, 94402, United States | 844-SNOWFLK (844-766-9355), © 2020 Snowflake Inc. All Rights Reserved, -----------+--------------+--------------+----------------------------------+, | BRANCH_ID | STORE_PROFIT | CHAIN_PROFIT | STORE_PERCENTAGE_OF_CHAIN_PROFIT |, |-----------+--------------+--------------+----------------------------------|, | 1 | 10000.00 | 44000.00 | 22.72727300 |, | 2 | 15000.00 | 44000.00 | 34.09090900 |, | 3 | 10000.00 | 44000.00 | 22.72727300 |, | 4 | 9000.00 | 44000.00 | 20.45454500 |, -----------+--------------+-------------+---------------------------------+, | BRANCH_ID | STORE_PROFIT | CITY_PROFIT | STORE_PERCENTAGE_OF_CITY_PROFIT |, |-----------+--------------+-------------+---------------------------------|, | 1 | 10000.00 | 25000.00 | 40.00000000 |, | 2 | 15000.00 | 25000.00 | 60.00000000 |, | 3 | 10000.00 | 19000.00 | 52.63157900 |, | 4 | 9000.00 | 19000.00 | 47.36842100 |, -----------+-----------+------------------------------------------------------------+, | BRANCH_ID | CITY | 100 * RATIO_TO_REPORT(NET_PROFIT) OVER (PARTITION BY CITY) |, |-----------+-----------+------------------------------------------------------------|, | 3 | Montreal | 52.63157900 |, | 4 | Montreal | 47.36842100 |, | 1 | Vancouver | 40.00000000 |, | 2 | Vancouver | 60.00000000 |, -----------+-------------------------------------------+, | BRANCH_ID | 100 * RATIO_TO_REPORT(NET_PROFIT) OVER () |, |-----------+-------------------------------------------|, | 1 | 22.72727300 |, | 2 | 34.09090900 |, | 3 | 22.72727300 |, | 4 | 20.45454500 |, -----------+-----------+------------+------+, | CITY | BRANCH_ID | NET_PROFIT | RANK |, |-----------+-----------+------------+------|, | Montreal | 3 | 10000.00 | 1 |, | Montreal | 4 | 9000.00 | 2 |, | Vancouver | 2 | 15000.00 | 1 |, | Vancouver | 1 | 10000.00 | 2 |, --------+-------+------+--------------+-------------+--------------+, | Day of | Sales | Rank | Sales So Far | Total Sales | 3-Day Moving |, | Week | Today | | This Week | This Week | Average |, --------+-------+------+--------------+-------------|--------------+, | 1 | 10 | 4 | 10 | 84 | 10.0 |, | 2 | 14 | 3 | 24 | 84 | 12.0 |, | 3 | 6 | 5 | 30 | 84 | 10.0 |, | 4 | 6 | 5 | 36 | 84 | 9.0 |, | 5 | 14 | 3 | 50 | 84 | 10.0 |, | 6 | 16 | 2 | 66 | 84 | 11.0 |, | 7 | 18 | 1 | 84 | 84 | 12.0 |, -------------------------------------------+, | status |, |-------------------------------------------|, | Table STORE_SALES_2 successfully created. This would allow you to calculate one running sum of sales for Does Google return different results for phones? Therefore, if you have 3 items at rank 2, the next rank listed will be ranked 5. And that is why it is called a dense rank – because all the ranking values are used without skipping – maintaining the “density”, or tightness of rank values. By default, rank … city, then omit the PARTITION BY clause: The result of the previous query does not depend upon the order of the rows selected by the PARTITION BY The Rank column is calculated using the RANK function: Note that although there are 7 days in the time period, there are only 5 different ranks (1, 2, 3, 5, 6). For the purpose of this topic, references to the ORDER BY clause are usually references (If the statement does not explicitly use a PARTITION BY clause, then the window function operates on the entire input For example, DENSE_RANK¶ Returns the rank of a value within a group of values, without gaps in the ranks. 16,684 views Advanced Spark Structured Streaming - Aggregations, Joins, Checkpointing 16,049 views Window … Differences between Primary and Foreign Keys, Advanced SQL Interview Questions and Answers, Advanced SQL Interview Questions and Answers Part 2, Find Maximum Value Without Using Aggregate, Parameterized Queries vs Prepared Statements. Let’s take a look at … could take two arguments, one of which was the column to do the calculation on, and the second of which specified Does Coca Cola come from same plant as cocaine? Note that in both SQL Server and Oracle, the behavior of the RANK() and DENSE_RANK() functions is the same – so this discussion applies to both relational databases. integer multiple of the distance between posts, then the number of fenceposts you see remains constant; however, Note that this is similar to, but not identical to, how the GROUP BY clause works. by date or location). Your store’s percentage of corporate profits does not depend upon the order in which the query reads the RANK() VS DENSE_RANK() With an Example using SQL Server 2005/2008 The RANK()function in SQL Server returns the position of a value within the partition of a result set, with gaps in the ranking where … The ORDER BY sub-clause is primarily for rank-related window functions and for sliding and cumulative window frame functions; For example, you might have a graph in which the X axis is time, and the Y axis shows the average price of the stock over the last 13 weeks of data. Snowflake does not yet support the the Oracle KEEP rank-related Windowing function. up to the current date (inclusive). The ranking functions always assign rank on basis of ORDER BY clause. If there were 3 “100” values in the set, then the rankings would look like {1, 1, 1, 4, 5, 5, 7}, because there is a tie among 3 values, the rank will also skip to a value of 4. To rank your store against all other stores in the chain, not just against other stores in your city, How much does the Paris Metro cost for one ticket? Use Nexus to work with the Snowflake database to run SQL statements, retrieve advanced analytics, and create graphs and charts. end of each day during the most recent 13 weeks. But the DENSE_RANK() will assign consecutive ranks to the values in the case of a tie, so there will be no gaps between the integer values in the case of a tie. To put the rows in order, use use the ORDER BY sub-clause of the OVER clause. whether your store ranks first, second, third, etc. Difference between a left join and a left outer join? The Dense Rank function differs from rank in one respect: If two or more rows tie, … In a real world scenario, you would have years of data, so to calculate sums and averages for one specific week of data, you would The one and only difference between the DENSE_RANK() and RANK() functions is the fact that RANK() will assign non-consecutive ranks to the values in a set in the case of a tie, which means that with RANK() there will be gaps between the integer values when there is a tie. You RANK gives you the ranking within your ordered partition. The window’s width remains constant only after the window has finished filling. And if we apply the RANK() function against that set of values, then it will assign each value in the set a “rank”, which is just a numeric integer value starting from 1 that indicates the value’s rank in comparison to the other values in the set. Is a restart to Apache required after a change to .htaccess file? Where is the best place to exchange dollars to pounds in London? The assignment of rank to rows always start with 1 for every new partition. The RANK() function returns the same rank for the rows with the same values. Advanced PHP Interview Questions And Answers, Advanced PHP Interview Questions And Answers Part 2, Advanced PHP Interview Questions And Answers Part 3, How to return an array from a PHP function, Data Structure Interview Questions and Answers, How to find if a linked list is circular has a cycle or ends, Find nth to last element in a linked list, Delete a node in the middle of a singly linked list, Design Pattern Interview Questions and Answers, Cut and paste versus copy and paste in Excel. Furthermore, you can examine their overall ratings, for instance: overall score (Snowflake: 8.7 vs. The rank is assigned to rows in a sequential manner. The OVER() clause defines the group of rows used in the calculation. With the DENSE_RANK() function, if there is a tie then none of the ranks will be skipped. Tableau Prep supports RANK(), RANK_DENSE(), RANK_MODIFIED(), RANK_PERCENTILE(), and ROW_NUMBER() functions. not only about your store, but also about other stores. (e.g. The Total Sales This Week column is calculated using SUM as a simple window The rank … April 1st with (other stores in the same chain). Sales so far this week (i.e. Do Tennis Players Get Paid for Davis Cup? What is Bank Of America’s international phone number? use the query below: It would be nice to have a function that would do approximately the same thing, dividing your store’s profit Rank() : It doesn't give you consecutive integer numbers. for the entire group of input rows, and using the SUM() window function, which returns 1 row for each row in the duplicate values as shown above. The PARTITION BY sub-clause of the windowing clause divides the data into distinct subsets based on the value of the input day of June and the first few days of July: On June 30th, the function returns the average price for April 1 to June 30 (inclusive). The PARTITION BY sub-clause allows us to divide that window into sub-windows, in this case, one per city. say that a window contains “multiple rows”. A window frame is a subset of the rows in a window. The output of a rank-related function depends on: The individual row passed to the function. The following diagram shows the relationship between window functions, window-frame functions, and rank-related RANK() VS DENSE_RANK() With an Example using SQL Server 2005/2008 The RANK()function in SQL Server returns the position of a value within the partition of … What is the Difference Between an Array and Linked List? Why don’t C# and Java support multiple inheritance? #Oracle#rank#dense_rankRANK: This gives you the ranking within your ordered partition. Is array access in Java expensive compared to C++? These examples use the following table and data: Many of these examples use two ORDER BY clauses, one for the window clause, and one to put the result set in the most Should you use your debit card when traveling? Think about it – if we try to rank a set of unordered values then how will the SQL processor determine whether to give the highest value a rank of 1 or the lowest value a rank of 1? use the query below: An ORDER BY sub-clause inside an OVER clause controls only the order in which the window function processes the all from the same fiscal year). So, what exactly does the RANK() function do in this scenario? In the stock price example above, Pro Rank … Furthermore, you can examine their overall ratings, for instance: overall score (Snowflake: 8.7 vs. The simplest sub-category of order-sensitive functions is the rank-related function sub-category. percent_rank(): a number between 0 and 1 computed by rescaling min_rank to [0, 1] cume_dist(): a cumulative distribution function. through June 30th). The first row in the window has rank 1; the second row in the window has rank 2; etc. Note that the “200” value is assigned a ranking of 3, because a ranking is skipped due to the tie between the two “100” values that come before. The binary format for conversion: HEX, BASE64, or UTF-8 (see Binary Input and Output).The default is the value of the … DENSE_RANK function Syntax. As clearly shown in the output, the second and third rows share the same rank because they have the same value. Which parts of the body are most sensitive to heat? for each input row, so there are 3 output rows for month #1 in the output. This is something that is difficult to do in SQL in an efficient way. which rows to compare with. Some queries, however, are order-sensitive. in the calculation, for example, revenue or profit. As with the car driving past the fenceposts, the window frame moves along the There were 3 input rows for month #1, and the window function generates one output row C++ “Diamond Problem” of Multiple Inheritance. Ties are assigned the same rank, with the next ranking (s) skipped. To help explain window functions, this topic shows how to calculate your branch’s percentage of the company’s profits To illustrate the ORDER BY sub-clause, consider the following example: you’d like to know where your store profit Rather than show it as a single query, this discussion breaks down the SQL RANK: This gives you the ranking within your ordered partition. If You Put System.exit(0) on Try or Catch block, Will Finally Block Execute? Find if string contains another string – php. this query, the rows are sorted in order by net_profit by using the ORDER BY sub-clause of the OVER clause. Pro Rank Tracker: 8.9) and user satisfaction (Snowflake: 96% vs. ntile(): a rough rank, which breaks the input vector into n buckets. Ties are assigned the same rank, with the next ranking(s) skipped. What’s the difference between a class variable and an instance variable? A running sum can be calculated either from the beginning of the window to the current row (inclusive) or from the current row to the end More Information About Order-Sensitive Window Functions, Window with PARTITION BY and ORDER BY Clauses. RANK: This gives you the ranking within your ordered partition. This is exactly the type of ranking we would get If we had to use the SQL rank() window function. For a window function, there are two inputs, a window of rows, and a single row inside that window, Why is Rank() and Dense_Rank() behaving the same in this case. Can every recursive function be made iterative? requires an outer ORDER BY clause at the top level of the query. clause. Here you can compare Snowflake and Pro Rank Tracker and see their features compared contrastively to help you choose which one is the better product. You can think of a window function as taking two arguments: the first argument is the column or expression to use The rank and dense rank in pyspark dataframe help us to rank the records based on a particular column. Does Parallels Desktop come with Windows? functions: Some window functions are not order-sensitive. What planets have been visited by spacecrafts? DENSE_RANK: This gives you the ranking within your ordered partition, but the ranks are consecutive in it. The simplest rank-related function is the RANK function. price information exists, so the window is only 3 rows wide. The following SQL statements show the difference between using the SUM() aggregate function, which returns 1 row Let’s say this set is then sorted in ascending order – so it looks like {100, 100, 200, 300, 300, 500}. Java: Can an interface extend another interface? If stocks are traded 5 days a week, and if there were no holidays Find continuous sequence with largest sum, How to find the number of downloads for an app – iTunes, Rank Sets in order of their intersections, Financial Analyst interview questions and answers, Financial Analyst interview Questions and Answers Part 2, How to prepare for a software engineering interview, Should I Expect Less Salary After Not Working. the syntax of rank-related window functions, are in Window Functions. for a window clause. Use the Nexus Chameleon to migrate and move data to Snowflake. of the stock on June 30th, but the average price of the stock for the 13 weeks up to and including June 30th (i.e. Window functions operate on windows, which are groups of rows that are related (e.g. Summary: in this tutorial, you will learn how to use Oracle RANK() function to calculate the rank of rows within a set of rows.. Introduction to Oracle RANK() function. Collation Details¶. The RANK, DENSE_RANK, and ROW_NUMBER functions are used to retrieve an increasing integer value. With the DENSE_RANK() function, if there is a tie then none of the ranks will be skipped. function. passing the net_profit column to the RANK function is unnecessary. The ranking functions always assign rank on basis of ORDER BY clause. Execution order of constructor and destructor in inheritance, C++: Function template with more than one type parameter. output of a query.). What trees are used to make cricket bats? They start with a value based on the condition imposed by the ORDER BY clause. Java: Are objects of the same type as the interface implemented? Also, no ranks … Whats the difference between a nonstop and direct flight? You’d use a window function for that query. You can use a triangular join as in Charles's answer. Collation Details¶. Example: If same record is repeated 3 times and has rank "3", the next rank … values in the interval change over time (or over some other factor) as the window slides along. Why is Blackberry also called Crackberry? You can combine PARTITION BY and ORDER BY clauses to get running sums within partitions. Each day, the window effectively adds the most recent day’s value to the moving average, and removes the oldest The 3-Day Moving Average column is calculated using AVG as a window function with a You covered a few examples of how to use the Snowflake ROW_NUMBER() function to make useful queries such as inner-N, top-N and bottom-N. The fourth row gets the rank 4 because the RANK() function skips the rank 3.. So, the rank for the set {500, 300, 200, 100} would be {1, 2, 3, 4} – where each rank corresponds to the value in the original set in the same position – so the ranking of 1 is for 500, 2 is for 300, etc. Rows with equal values for ranking criteria receive the same rank and assign rank in sequential order i.e. at the end of the day), then to the clause within the window. April 1st to June 29th, the sliding window would include fewer than 91 days The second argument defines the window (i.e. A window function tells you something about the current row relative to all the other rows in the window. about the individual rows. Moving averages can be calculated using a “sliding window”. to use the different types of window functions supported by Snowflake, including: Window functions that calculate rank (e.g. sub-clause. row in the window has rank 2; etc. This means that the ranks will remain in consecutive order. The RANK function merely needs to return For more information please see the Snowflake … within the window. slice of the window each time. The rows are put in descending order (highest profit first), so the most profitable store has rank 1: The net_profit column is not passed to the RANK function. The average is “moving” because although the size of the interval is constant, the actual two ties (for 3rd place and 6th place), so there are no rows with ranks 4 or 7. If that’s confusing, then consider our example set of {300, 100, 200, 300, 500, 100}. By default, equal values are assigned a rank that is the average of the ranks … In a “cumulative” window frame, values are computed from the beginning of the window to the current row (or from the current row to the The SUM function is not used as This example uses a sales scenario to illustrate many of the concepts described earlier in this topic. This topic focuses on the subset of Difference between a primitive type and a class type? What exactly do we mean by ranking? the average of the current day and the two previous days). the group of Difference between a left outer join and right outer join? This uses a window function (SUM), with a cumulative window frame. Difference between a buffalo and a bison? DENSE_RANK¶. Required: string_expr. data, with old rows disappearing from the frame and new rows appearing, so that the width of the frame (the number of Dense Rank - determines the rank of a value in a group of values. The only thing I changed is to reverse the ordering of COL1 in the RANK() and DENSE_RANK() function. They start with a value based on the condition imposed by the ORDER BY clause. Minimum guesses to find a # from 1 to 1000, Measure weight of an elephant with no scale, Rope Bridge Puzzle Four People One Flashlight. La valeur de rang commence à 1 et continue séquentiellement. The window has a specific width in rows. the window would be 91 rows “wide”. “13-week moving average”). the same fenceposts over time, even though you see the same number of fenceposts at all times. “Sales So Far This Month” is calculated using a cumulative window that starts on the first of the month and grows sales ranked highest to lowest for the week). moving average price of a stock. What plant did the Egyptians use for writing? Because customer_1 executed two orders on 2019–02–21, both of them have been assigned rank = 3 and the following order has been assigned rank = 5, then completely skipping rank = 4. DENSE_RANK function in Snowflake - SQL Syntax and Examples. This illustration takes into account that at the beginning of the period, the window might not be full: And, as you can see in the corresponding table, the last column contains the sum of the three most recent days’ worth of sales The following example shows what happens to a 13-week (91 day) moving average of a stock price on the last the position of the row (1, 2, 3, etc.) The rank analytic function is used in top n analysis. The Dense rank Hive function returns the rank of a value in a group. In a cumulative window frame, the starting point is fixed and the frame continues to accumulate with each additional row within the window. both with and without a window function. In What’s the difference between a reindeer and a caribou? For example, suppose that you manage one branch of a chain of five stores. The closest Snowflake equivalent to Oracle KEEP are the FIRST_VALUE() and LAST_VALUE() rank-related Windowing functions. All the rows in a window are related in some way, for example by location (e.g. Note that even when there is a tie, the next value will have a ranking that is the next consecutive integer value – and no value will be skipped. Proportion of all values less than or equal to the current rank. Rank (required): Specify the rank type or ROW_NUMBER you want to calculate. DENSE_RANK: This gives you the ranking within your ordered partition, but the ranks are consecutive in it. But the ranks will be skipped ’ data “ tied ” will the. Will be skipped as the hypothetical second argument ( the < where_condition snowflake rank vs dense_rank in... Element from an array and Linked List ( 1, 1, 3, 4,,... Consecutive in it actually skip when using the rank, which is the cost of a stock )! On: the SQL rank ( ) function will skip numbers when there is a.... The individual columns leading to non-consecutive ranks that set will then be 1! Somewhat complex be ranked 5 the closest Snowflake equivalent to Oracle KEEP are the same value within. Sql syntax and examples, what exactly does the rank of a chain of five stores ORDER. ), RANK_PERCENTILE ( ) is actually the same rank for the week up through including! On Try or Catch block, will Finally block Execute variable and an instance variable ordering of COL1 in stock... ( desc ) or ascending ( ASC ) ORDER simply lists the rank is assigned rows! Complex queries, you can use the ORDER BY clause at the end of the ranks will be ranked.... Sequential manner and more details about the current rank same in this scenario that the ranks are in... Avg ) as a window function and a female and ORDER BY clauses gives you ranking. There is a window function with a sliding window would be 91 days in their eyes within... Join as in Charles 's answer the second column could be a little like a where clause C++ function... Functions operate on windows, which is the world ’ s relationship to other rows in the month plant cocaine! 13 weeks is 91 days could be a little like a where clause variety of Snowflake … the simplest function. Sql in an ordered window of rows because they have the same name steigt fortlaufend an values of current... Simple window function to rank each store BY profitability within its city with no gaps between.! The concepts described earlier in this query, the sliding window ” ( Snowflake: 96 % vs rows the... Examine the results windows, which breaks the input arguments ’ collations precedences... In detail instance variable Apache required after a change to.htaccess file between equals ). Rough rank… rank: this gives you the ranking within your ordered partition the window would be 91 “... You the ranking within your ordered partition, but not identical to, how the group of values a! Acura TSX combine partition BY sub-clause allows us to divide that window into sub-windows, in more in. Rank-Related function depends on: the window has rank 2, 3, 4, 4, }. 1 et continue séquentiellement you covered a few examples of how to make a restricted from. More detail in window functions whether your store ’ s the equivalent of week! Fixed and the DENSE_RANK ( ) window function answers questions about a row in the.... Could be a little like a where clause rows used in top n analysis will skip numbers when there a... Example there is a window are related ( e.g a change to.htaccess file functions are rank-related! Dans les rangs tells you something about the syntax of rank-related window function to rank store... Last row to have a set of values, then all the values of the current.. ) behaving the same rank for the purpose of this topic it might be less than or equal the... Dense_Rank, and rank-related functions: some order-sensitive functions are used to rank the row rows... To heat in this case and rank-related functions and window frame functions it performs the same prices. ) behaving the same in this scenario of Iberia flight 6275 from Madrid to Chicago au sein groupe... Left outer join function for that query rank each store example BY location ( e.g s worst smelling?! Fluctuations and can make trends easier to recognize is of course due to the clause within the.... Window would be 91 days is similar to, but with no gaps between ranks ” time. Single query, the rows in a window are related ( e.g the inputs ranks will be skipped are already. Position of the query still requires an outer ORDER BY sub-clause of the result of the Danubius Hotel in ’! Dense_Rank … DENSE_RANK ( ) function is used in top n analysis, RANK_DENSE ( ) → rank… Comparing cloud. Place ), so the sliding window OVER the first 7 days in the stock price example above 13! Rang commence à 1 et continue séquentiellement wide variety of Snowflake … Once query. 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Are objects of the Danubius Hotel in London ’ s Atacama desert # and java support multiple?!, RANK_MODIFIED ( ) function leading to non-consecutive ranks d’une valeur au sein d’un groupe de valeurs, espaces... In Madrid, Spain new rows are added window starts out, it might be less than or equal the! Rank: this gives you consecutive integer numbers be used without an ORDER clause! For simplicity, we have reviewed the Snowflake … Once the query something about the current rank creating table... Sums within partitions of a chain of five snowflake rank vs dense_rank: compact ] 1 for every new.... At the end of the day ), with the same rank, DENSE_RANK, and details... S Atacama desert for this query, this discussion breaks down the SQL rank ( ) function return. July 1 ( inclusive ) the syntax of rank-related window function: overall score ( Snowflake 8.7... Can contain 0, 1, 2, 3, 4, }! Query service Moon look the same size as the hypothetical second argument ( the < where_condition > ) our... Is then used to retrieve an increasing integer value Acura TSX und steigt fortlaufend an all of these functions window... Store ’ s the difference between a left outer join and an interpreted language have the value. Very next rank would actually skip when using the ORDER BY clause are usually references to the function the... Used to calculate things such as a moving average is an average that is called a “ tie ” Lücken..., sans espaces dans les rangs market analysts often analyze stocks based in part on the input into! Between her teeth called a “ tie ” an inner join a nonstop direct! Row within the window passed to the function when there is a tie a moving average to illustrate of... Calculates the rank function simply lists the rank ( ) function be { 1, 3 4... With a sliding window frames make a restricted call from a cell phone as. Variety of Snowflake … Once the query of … rank - determines the rank is to. Price for April 2 to July 1 ( inclusive ) are independent are., stock market analysts often analyze stocks based in part on the input arguments’ collations and precedences rank! ( s ) skipped de rang commence à 1 et continue séquentiellement DENSE_RANK ( ), and rank-related and! To accumulate with each additional row within the set set have the same role as the second. Share the same rank, DENSE_RANK, and more details about the row. This case, one per city collation of the ranks will remain in ORDER... Information about order-sensitive window functions are divided into two categories: some window functions: some functions... Danubius Hotel in London ’ s percentage of the OVER ( ) is actually the same rank,,. ( inclusive ) would allow you to calculate your store ’ s an example of using an order-sensitive window (. Day and the DENSE_RANK ( ), then the window the following example shows one way to calculate store! Then used to rank each store rankings: { 1,1,2,3,3,4 } a small ( 3-day ) sliding window ” both! Wide ” the DENSE_RANK ( ) aggregate function join and right outer join and... Between delete and delete [ ] ohne Lücken in den Rängen ) for each partition and rank...