sql-server - SQL Server 中具有可选日期时间参数的存储过程

Question

当此存储过程中的参数 ( & ) 是可选的时，如何select在 SQL Server 中编写此查询？datetime@StartDate@EndDate

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

您可以在存储过程的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

我知道这是一篇旧文章，但有一些更简洁的替代方法。这篇文章完美地概述了它。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。

Answer 4

您只需将@StartDate和的数据类型定义@EndDate为Date。你可以这样尝试：

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

SET @StDate = ISNULL(@StartDate ,NOW())
SET @EtDate = ISNULL(@EndDate , NOW())

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

Answer 5

对于 null 传递到日期字段

声明 dob 字符串

在对象分配 stud_dtl_obj.dob = dob.Text == "" ？空：dob.Text；

在过程分配 SqlHelper.MakeParam("@dob",obj_stud_dtl.dob),

内部程序@dob date=NULL,