sql rank function example

Split and then BULK INSERT DECLARE @s varchar (8000), @sql nvarchar (4000)Set @s= ' 1,12,1212,4545 'Set @sql = ' INSERT into T (col) select ' +replace (@s, ', ', ' Col union ALL Select ')EXEC (@sql) Testdrop table #tableDECLARE @s varchar (8000), @sql nvarchar (4000)Set @s= ' 1,12,1212,4545,454 'CREATE TABLE #tab

SQL format () function usage and simple example, sqlformat The FORMAT () function is used to FORMAT the field display. SQL FORMAT () syntax SELECT FORMAT(column_name,format) FROM table_name; Parameters Description Column_name Required. The f

Back in the evening, the classmate said the interview encountered a SQL interview topic, did a bit of their own, summary summary.The topics are as follows:　　The following is a product data sheet (Product ID, color col, num), each of which is available in one or two colors.　　Ask for the difference in the number of colors for each product (for the total number of reserved products with only one color)　　　　　　　　The solution is as follows:1. Find out the n

(SUM (Size) as float)/128 from Sys.master_files WHERE database_id = a.database_id) as [TotalSize (MB)], a.physical_name as File_path from sys.master_files ainner JOIN SYS.D Atabases B on A.database_id = b.database_id--form function (19%) SELECT a.database_id as [db_id], b.name as [db_name], b.create_date, case A.type when 1 Then ' Log ' ELSE ' Data ' END as File_type, CAST (a.size as FLOAT)/128 as [Size (MB)]--Size in pages (8 KB) , CAST (SUM (s

In the AWR report, it was found that a SQL is inefficient:Select Batch_status from T_batch_infowhere batch_status= ' 0 'and sys_id= ' STM06 ';View execution Plan Discovery the query takes advantage of the index, which contains the Batch_status field, but with the following SQL query:Select Batch_status,count (*) from T_batch_infoGROUP BY Batch_statusThere are few values found for the Batch_status field:Batc

SQL 2005 Character function instance and application example Use DemoGo/*Extract the value from the column string of the table code into the record tableThe character type in string isdsddddd,2222222,222221,3The last one was labeled for Biaoji in the record tableThe value corresponding to the record table is divided by ', ' in the preceding*/Godrop proc Proc_spl

, Fsalary,count (FName) over (PARTITION by fcity) from T_personOver (PARTITION by fcity) indicates that the result set is partitioned by fcity, and the aggregation calculation results of the group to which the current row belongs are calculated. Multiple window functions can be used simultaneously in the same SELECT statement, and these windowing functions do not interfere with each other. For example, the following

whether the letter contains invalid characters. Prevent SQL from URL injection: SQL _inj.java code: Package SQL _inj; import java.net. *; import java. io. *; import java. SQL. *; import java. text. *; import java. lang. string; public class SQL _inj {public static Boolean

SQL database Stored Procedure example parsing and SQL stored procedure example What is a stored procedure:Stored procedures can be said to be a record set, it is a code block composed of some T-SQL statements, these T-SQL statemen

of the group to which the current row belongs are calculated. Multiple window functions can be used simultaneously in the same SELECT statement, and these windowing functions do not interfere with each other. For example, the following SQL statement is used to display information about each individual member, the number of people in the city, and the number of peers: SELECT fname,fcity, Fage, Fsalary, coun

to the country in which the employee is located: 1 Select Country,count (*) as N ' number ' 2 from HR. Employees 3 GROUP BY country When the field to be queried is not included in the GROUP BY clause, the corresponding error is reported, so it is important to note that after the query fields that appear after the select are grouped, you also need to appear behind group by. (2) Here is a hint: query conditions do not use computed columns, the following are the specific reasons: For

The instance explains the usage of the SQL server ranking function DENSE_RANK, And the instance explains dense_rank. I. Requirements Previously, the ranking function of SQL server used RoW_NUMBER () most. I usually use ROW_NUMBER () + CTE for paging. Today, I visited the park and saw another built-in ranking

function. For example, check each employee's order and sort by time with OrderInfo as ( SELECT row_number ()-PARTITION by EmployeeID Order by OrderDate) as number, orderid,c Ustomerid, employeeid,orderdate from Orders (NOLOCK) ) SELECT Number,orderid,customerid, EmployeeID, OrderDate from OrderInfo WHERE number BETWEEN 0 and 10 The window fu