Question

喜我在从createddate和leavestartdate列上的字符串转换datetime时遇到问题.....

由varchar（30）创建的表结构，createddate datetime，leavetype varchar（30），leavestartdate varchar（30），status varchar（30）

ALTER Procedure [dbo].[sp_SearchLeave]
@createdby      varchar(30) = null ,
@createddate    DateTime    = null ,
@leavetype      varchar(30) = null ,
@leavestartdate varchar(30) = null ,
@status         varchar(30) = null

As
Begin

if @createddate is not null and Len(@createddate) = 0 set @createddate = null
if @leavetype = 'Select' set @leavetype = null
if @leavestartdate is not null and Len(@leavestartdate) = 0 set @leavestartdate = null
if @status = 'Select' set @status = null

Select leaverequestid,leaveenddate,leavetype,leavestartdate,status
from LeaveRequest
where 
       (@createdby is null or createdby like '%' + @createdby + '%')
  and  (@createddate is null or createddate like '%' + @createddate + '%')
  and  (@leavetype is null or leavetype like '%' + @leavetype + '%')
  and  (@leavestartdate is null or leavestartdate like '%' + @leavestartdate + '%')
  and  (@status is null or status like '%' + @status + '%')
End

当我执行此sp作为输入时 exec sp_SearchLeave''，''，''，'12/15/2010'，''

它显示错误信息，如
消息241，级别16，状态1，过程sp_SearchLeave，第26行从字符串转换datetime时转换失败。

Answer 1

原因可能是like声明。您将datetime参数（@createddate）视为字符串，方法是将%附加到字符串，这是您无法做到的。

从字符串转换datetime时转换失败

1 个答案: