sql server charindex last occurrence

The string lookup feature has recently been used frequently. Including 1. Full matching Find string 2. Fuzzy Lookup string Both the CHARINDEX and PATINDEX functions return the start position of the specified pattern. PATINDEX can use wildcard

DECLARE @s VARCHAR (100)SET @s= ' r1-1-1 ' gets the number after the last "-"SelectREVERSE(@s) return value: 1-1-1R reverses the character. SelectLEN(@s) return value: 6 Get length SelectCHARINDEX(‘-‘,REVERSE(@s)) Return value: 2--Gets the position

Generally use fuzzy query, everyone will think like SELECT * FROM table where a like '% character% 'If a SQL statement uses multiple like fuzzy queries and a large number of record bars, it must be slow.The following two methods can also implement

DECLARE @s VARCHAR (100)SET @s= ' r1-1-1 ' gets the number after the last "-"SelectREVERSE(@s) return value: 1-1-1R reverses the character. SelectLEN(@s) return value: 6 Get length SelectCHARINDEX(‘-‘,REVERSE(@s)) Return value: 2--Gets the position

SQL statement Copy Code code as follows: Reverse (substring reverse (path), 1,charindex ('/', reverse (path))-1) How SQL takes out the character to the right of the last special character in a string, for example: 10*20*300, how do

SQL statement Copy codeThe Code is as follows: reverse (substring (reverse (Path), 1, charindex ('/', reverse (Path)-1 )) How can I retrieve the right character of the last special character in a string, for example, 10*20*300? How can I get 300?

First build a test sheet: CREATE table teststring (name nvarchar (100));INSERT INTO teststringValues(' Zhang San, John Doe, Harry, Caifan, Xiao Rambler, Royal Palace '); 1. Determine the number of occurrences of a character (string) in a string, the

String functionsIn developing T-SQL, it is often necessary to perform a variety of operations on strings, and the following describes commonly used string functions.　　1. ASCII ASCII code to get charactersThe ASCII code is the standard encoding of

First build a test sheet:Create Table nvarchar (+)); Insert into teststring Values (' Zhang San, John Doe, Harry, Caifan, Xiao Rambler, royal palace ');1. Determine the number of occurrences of a character (string) in a string, the position where

Several functions (Stored Procedures) that are useful but not commonly used (or with unclear details) are found during SQL server usage ): Isnumeric, isdate, patindex, newid, collate, sp_executesql, checksum Write it down for future query. Do