Question

我有选择和过滤数据的存储过程。例如：

select CONVERT(nvarchar,[Date],120) , [FirstName] , [LastName]
FROM myDB
WHERE  (@Date IS NULL OR @Date = '' OR [Date] = @Date)
       (@FirstName IS NULL OR @FirstName  = '' OR [FirstName] = @FirstName)
       (@LastName IS NULL OR @LastName  = '' OR [LastName] = @LastName)

当我通过FirstName或/和LastName进行过滤时，它可以工作，但是当我想通过Data过滤它不起作用时，我认为可能存在转换问题？我高管喜欢：

exec myProc '2013-02-03','',''

Answer 1

这可能对你有所帮助 -

SELECT 
      CONVERT(NVARCHAR,[Date],120) 
    , [FirstName] 
    , [LastName]
FROM myDB
WHERE ISNULL(@Date, [Date]) = [Date] --<--
    AND (ISNULL(@FirstName, '') = '' OR [FirstName] = @FirstName) 
    AND (ISNULL(@LastName, '') = '' OR [LastName] = @LastName)

在存储过程ms sql中转换

1 个答案: