字付串函数 substring(ex,star,end)

 1 --substring(ex,star,end)
 2 SELECT SUBSTRING(Name, 1, 2) AS ProductName, ListPrice
 3 FROM Production.Product order by ProductName
 4
 5 SELECT Name FROM Production.Product order by Name
 6
 7 select * from Production.Product
 8
 9
10 SELECT SUBSTRING(Name, 1, 6) AS ProductName, ListPrice
11 FROM Production.Product
12 WHERE  ListPrice LIKE ‘3%‘;
13
14
15 SELECT SUBSTRING(Name, 1, 30) AS ProductName, ListPrice
16 FROM Production.Product
17 WHERE CONVERT(int, ListPrice) LIKE ‘3%‘;