SQL Server中具有可选DateTime参数的存储过程

Question

select当datetime参数(@StartDate&@EndDate)在此存储过程中是可选的时,如何在SQL Server中编写此查询？

CREATE PROCEDURE [dbo].[prSearchEmployees]
(
    @Id INT = NULL
    ,@FullName VARCHAR(20) = NULL
    ,@Age INT = NULL
    ,@StartDate = NULL
    ,@EndDate = NULL
)
AS
BEGIN
   SELECT * 
   FROM Employee 
   WHERE Id = ISNULL(@Id, Id) 
     AND FullName LIKE ISNULL(@FullName + '%', FullName)
     AND Age = ISNULL(@Age, Age)
END

Answer 1

您可以在您的sproc顶部添加两个新变量.并根据ISNULL函数进行分配

CREATE PROCEDURE [dbo].[prSearchEmployees]
(
 @Id INT = NULL
,@FullName VARCHAR(20) = NULL
,@Age INT = NULL
,@StartDate DATETIME = NULL
,@EndDate DATETIME = NULL
)
AS
BEGIN

DECLARE @SDate DATETIME
DECLARE @EDate DATETIME

SET @SDate = ISNULL(@StartDate, GETDATE())
SET @EDate = ISNULL(@EndDate, GETDATE())


SELECT * FROM Employee 
     WHERE Id = ISNULL(@Id, Id) 
       AND FullName LIKE ISNULL(@FullName + '%', FullName)
       AND Age = ISNULL(@Age, Age)
       AND Date BETWEEN @SDate AND @EDate

Answer 2

我知道这是一个古老的帖子,但有一些选择更简洁.这篇文章完美地概括了它.所以在前面的例子中你会做类似的事情

 CREATE PROCEDURE [dbo].[prSearchEmployees]
(
 @Id INT = NULL
,@FullName VARCHAR(20) = NULL
,@Age INT = NULL
,@StartDate DATETIME = NULL
,@EndDate DATETIME = NULL
)
AS
BEGIN    

SELECT * FROM Employee 
     WHERE ((@Id IS NULL) OR (Id = @Id))
       AND ((@FullName IS NULL) OR (FullName LIKE @FullName + '%'))
       AND ((@Age IS NULL) OR (Age = @Age))
       AND ((@SDate IS NULL) OR (Date BETWEEN @SDate AND @EDate))

Answer 3

AND(
      ((NullIf(@begin, '') IS NULL)  OR CAST(ColumnDate AS DATE) >= @begin)  
    AND ((NullIf(@end, '') IS NULL)  OR CAST(ColumnDate AS DATE) <= @end)  
   )

涵盖所有选项、空值、空白和比较。