像存储过程中的运算符

Question

declare @paging as varchar(max)
    set @paging = 'A'
 if @paging is null Or @paging =''
    set @paging = 'where ttmo_supp =''tt&MO'''  
    else 
    set  @paging = 'where ttmo_supp =''tt&MO'' and Name like '+''''+ @paging +'%'''+''

当我执行我的前端代码时，它会抛出错误，指出“tt附近的语法错误不正确”。

Answer 1

declare @paging as varchar(max)
    set @paging = 'A'
 if @paging is null Or @paging =''
    set @paging = 'where ttmo_supp =''tt&MO'''  
    else 
    set  @paging = 'where ttmo_supp =''tt&MO'' and Name like '+''''+ @paging +'%'''+''

Select @paging

在变量上的Or之后，您忘记了IF语句中的@符号。

结果

其中ttmo_supp =＆＃39; tt＆amp; MO＆＃39;和名字一样＆＃39; A％＆＃39;

更新了程序

Create Procedure SP_AlphabeticPaging @paging VarChar(Max)
As
Begin
  if @paging is null Or @paging =''
    set @paging = 'where ttmo_supp =''tt&MO'''  
  else 
    set  @paging = 'where ttmo_supp =''tt&MO'' and Name like '+''''+ @paging +'%'''+''

  Select @paging
End
Go

EXEC SP_AlphabeticPaging 'A'
-- Result
-- where ttmo_supp ='tt&MO' and Name like 'A%'
EXEC SP_AlphabeticPaging ''
-- Result
-- where ttmo_supp ='tt&MO'