SQL追加字符串

Question

如何将字符串从另一个字符串中的特定位置插入到数据库中的列中。与我在表中名为Name的列名world.Name中的列有值Test.How在第二个字符串名中插入从测试后的位置来看，测试应该成为最新的。

Database name :World 
Table Name :Name 
A Value in Name Table: Test 
Desired output: Te-New-st- 
(That is adding string "New" afer 2nd position in "Test" string.) 

Answer 1

对于SQL Server

--Original String 
DECLARE @orgString varchar(50) = 'This is some test string' 
--Search String 
DECLARE @searchString varchar(50) = 'te' 
--String to insert into the original string 
DECLARE @insertString varchar(50) = 'NEW' 

SELECT 
CONCAT(SUBSTRING(@orgString,1,CHARINDEX(@searchString,@orgString)+1), 
      @insertString, 
SUBSTRING(@orgString,CHARINDEX(@searchString,@orgString)+2,LEN(@orgString))) 
AS String 

要在表上运行这样的事情对数据，与您的列名

--Search String 
DECLARE @searchString varchar(50) = 'te' 
--String to insert into the original string 
DECLARE @insertString varchar(50) = 'NEW' 

SELECT CONCAT(SUBSTRING(Name,1,CHARINDEX(@searchString,Name)+1), 
      @insertString, 
SUBSTRING(Name,CHARINDEX(@searchString,Name)+2,LEN(Name))) 
AS String 
FROM Table_1 

代替原来的字符串变量如果是总是将在第二和第三的位置之间，你可以简化它到这一点。

--String to insert into the original string 
DECLARE @insertString varchar(50) = 'NEW' 

SELECT CONCAT(SUBSTRING(Name,1,2), 
       @insertString, 
       SUBSTRING(Name,3,LEN(Name))) 
      AS String 
FROM Table_1 

看看这个字符串函数引用，String Functions