SQL Server 实现类似C#中 PadLeft功能

 1 USE [Test]
 2 GO
 3 SET ANSI_NULLS ON
 4 GO
 5 SET QUOTED_IDENTIFIER ON
 6 GO
 7 --@column 表示字段或者常量，@paddingChar  表示 补位字符， @len  补位数量， @returnStr
 8 create function [dbo].[PadLeft](@column varchar(16),@paddingChar char(1),@len int)
 9 
10 returns varchar(16) as
11     begin
12         declare @returnStr varchar(16)
13         select @returnStr = isnull(replicate(@paddingChar,@len - len(isnull(@column ,0))), ‘‘) + @column
14         return @returnStr
15     end