Oracle中substr函数的用法(sqlserver right)
本文导语: Oracle: 语法: substr(string,a,b): a:从第几位开始,第一位a=1, b:取几个字符 [sql] substr('This is a test', 6, 2) would return 'is' substr('This is a test', 6) would return 'is a test'
语法:
substr(string,a,b):
a:从第几位开始,第一位a=1,
b:取几个字符