搜索存储过程（SQL Server） - 从字符串转换日期和/或时间时转换失败 - 简单吗？

Question

我有一个存储过程，我将3个变量bankNumber,branchNumber和DateFrom传递给。

基于这些变量，我想查询表（在下面的图片中看到的存储过程）返回符合我传递的标准（通过变量）的所有记录。当我通过它DateFrom变量

Conversion failed when converting date and/or time from character string

这似乎是失败的：

相反，我正在此错误。

谢谢您的帮助

ALTER PROCEDURE [dbo].[Search_Records] 
    @bankNumber varchar(3), 
    @branchNumber varchar(3), 
    @dateCreated datetime 
AS 
BEGIN 
    -- SET NOCOUNT ON added to prevent extra result sets from 
    -- interfering with SELECT statements. 
    SET NOCOUNT ON; 

    -- Insert statements for procedure here 
    DECLARE 
     @Bank_Number varchar(3) = @bankNumber, 
     @Branch_Number varchar(3) = @branchNumber, 
     @DateFrom datetime = @dateCreated, 
     @DateTo datetime = @dateCreated 

    SELECT DISTINCT  
     A.bankNumber, 
     A.branchNumber, 
     A.dateCreated 
    FROM   
     dbo.CENSORED A 
    WHERE 
     (@Branch_Number IS NULL OR bankNumber LIKE @BankNumber + '%') 
     AND (@Branch_Number IS NULL OR branchNumber LIKE @Branch_Number + '%') 
     AND (@DateFrom IS NULL OR dateCreated LIKE + @DateFrom + '%') 
     AND (@DateTo IS NULL OR dateCreated LIKE + @DateTo + '%') 
    END 

Answer 1

您不能使用LIKE运营商与datetime值。如果您仅在月份进行匹配，则需要使用MONTH()函数。 LIKE运算符只能与字符串数据类型一起使用。

没有看到所有这些变量在存储过程中声明的点，一个简化版本应该是这个样子....

ALTER PROCEDURE [dbo].[Search_Records] 
    @bankNumber varchar(3), 
    @branchNumber varchar(3), 
    @dateCreated datetime 
AS 
BEGIN 
    SET NOCOUNT ON; 

    SELECT DISTINCT  
     A.bankNumber, 
     A.branchNumber, 
     A.dateCreated 
    FROM   
     dbo.CENSORED A 
    WHERE 
      (@Branch_Number IS NULL OR bankNumber LIKE @bankNumber + '%') 
     AND (@Branch_Number IS NULL OR branchNumber LIKE @branchNumber + '%') 
     AND (@dateCreated IS NULL OR (MONTH(dateCreated) = MONTH(@dateCreated) 
             AND 
             YEAR(dateCreated) = YEAR(@dateCreated))) 

END 

注

这将产生一个非常低效执行计划，考虑使用动态sql查询与这样的可选参数。