sql rank function example

SQL SERVER ranking function RANK, DENSE_RANK, NTILE, ROW_NUMBERPrefaceThis document describes how to use instance data to help you understand SQL SERVER ranking functions RANK, DENSE_RANK, NTILE, and ROW_NUMBER.PreparationsCreate a test table: create table test(id int ident

5495 paint-blue 4 35 1496 Paint-yellow 4 2493 paint-red 4 3492 paint-black 4 14 4494 Paint-silver 4 5 (s) affected)B. Ranking all rows in the result setThe following example returns the top 10 employees by salary. because the PARTITION by clause is not specified, the

identity_insert [dbo]. [Student] off/****** Object:default [df__departmen__depna__5441852a] Script date:05/11/2015 23:16:23 ******/ALTER TABLE [dbo]. [Department] ADD DEFAULT (") for [depname]go/****** Object:default [df__score__category__5ebf139d] Script date:05/11/2015 23:16 : ******/alter TABLE [dbo]. [Score] ADD DEFAULT (") for [category]go/****** Object: Default [Df__score__score__5fb337d6] Script date:05/11/2015 23:16:23 ******/alter TABLE [dbo]. [Score] ADD DEFAULT ((0)) for [score]go/**

Label:1.row_number () is the line number2.rank: Similar to Row_number, except that it processes the order by field, and if the field value is the same, the line number remains unchanged3.dense_rank: Similar to rank, the difference is whether the row number retains a position, and rank retains the position, that is, the row's value is changed from 1 to 3, because

1.rank function Rank calculates the rank of a set of values and returns the numeric type. Rankings may be discontinuous. If there are 5 people, 2 of whom rank first, then rank returns the result: 1 1 3 4 5. As an aggregate

1. Over () is an analytic function that can be used in conjunction with the rank () function or in conjunction with other functions.Take the top three points for each subject, and the SQL statements are as follows:where t.rkArranges (rank ()) functions. These permutation fun

First, use rownum for record ranking: In the previous "Introduction to Oracle Development analysis function over", we understand the basic application of analytic function, now we consider the following questions: ① to rank all customers by total order② rank by region and customer order totals③ find the top 13 custom

Label: Content from: Oracle®database SQL Language Reference 11g Release 2 (11.2) e41084-03. The Empolyees table is from the HR scenario. The rank function calculates the position of a value in a particular sort (using the aggregation syntax) and calculates the rank by the value of the specified column (u

Label: A function is a collection in which each element is a two-tuple or multivariate group. For example F = {(x, y) | X∈r y∈r y = 2x}, g = {(x, y, z) | (x, Y, z) ∈r3 z = 2x + 3y}, symbols F and G refer to two functions. A relationship instance is a collection, and each element of it is a tuple. You can see that relationship instances and functions are almost the same concept, except that each element o

Php implements the rank function in excel, excelrank. Php implements the rank function in excel. excelrank describes how php implements the rank function in excel. Share it with you for your reference. The specific analysis is as

Label: first of all, to understand rank in English means: rank. That is, it is a function that determines the level of the data. Take sales as an example, there are regions, years, months, salespeople, sales, records of these five fields. We can sort salespeople by region, year, month, sales, which is the equivalent

, so it is recommended to query the time directly execute the SQL statement to achieve the Rank function function, this online there are many Like how the rank function in MySQL is implementedIn this

This article mainly introduces how to implement the rank function in excel in php. It gives a detailed analysis of the rank function functions and implementation methods. For more information, see This article mainly introduces how to implement the rank

This article gives an example of how PHP implements the Rank function in Excel. Share to everyone for your reference. The specific analysis is as follows: The SQL statement implementation ranking is like this:Total score is 195,180,180,161, the rank is 1,2,3,4, meet the sit

What is the 1.rank functionRank related document [1] can be translated as "return the original array (?) sort (?) for each element in the After the rank (?)", on the surface can really get the order, but the array, sorting, rank is not clear.2.rank function Usage ScenariosFo

This article mainly introduces how to use php to implement the rank function in excel. it gives a detailed analysis of the rank function functions and specific implementation methods, for more information about how to use php to implement the rank

server2005 Miscellaneous (1): using a common table expression (CTE) to simplify nested SQL . Note that Row_numberFunctions are used for paging, Over Clause Order And sorting records Order It should be the same; otherwise, the generated sequence number may not be continuous. Of course, do not use Row_number The function can also query records within a specified range, which is troublesome. The general met

name],* from #TmpThird, Dense_rank () over (order by ColumnName)Select Dense_rank ()over (orderby name),* from #TmpAfter executing the SQL, it is found that the following result set has 2 numbered 4 lines followed by the number 5 lines.The Dense_rank () function is similar to the RANK () function.The RANK ()

Questions Guide:What is the role of 1.NTILE?2. In descending order of PV, which window function can be used to generate a PV position within a group per day?What is the role of 3.RANK and Dense_rank?Next: Hive Analysis window function (i) Sum,avg,min,maxThis article describes the previous sequence functions, Ntile,row_number,