[SQL] (Stored Procedure)获取当前日期（一）

设置服务器恒定时间，且获取当前服务器的时间。

[SQL Server]如果直接利用GETDATE()获取服务器当前时间，所获取的时间为server所在的本地的时间，这样如果数据中心在其他地域国家，或者不同server同步数据，直接利用GETDATE()便会出现问题。解决方案，在数据库创建一个存储当前business date的表：SysCurrentDate，之后在从该table中获取被设定好的当前Server date
(1)： 存储business date的拟创表语句

CREATE TABLE [dbo].[SysCurrentDate](
[ID] [int] IDENTITY(1,1) NOT NULL,
[CurrentDate] [datetime] NOT NULL,
[CurrentTime] [datetime] NULL,
[CreatedBy] [nvarchar](30) NOT NULL,
[CreatedDate] [datetime] NOT NULL,
[UpdatedBy] [nvarchar](30) NULL,
[UpdatedDate] [datetime] NULL,
CONSTRAINT [PK_SysCurrentDate] PRIMARY KEY CLUSTERED
(
[ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

(2)： 利用stored procedure获取该当前业务日期（注：如果该表中有数据则返回该当前date，如果没有数据则直接返回DB Server所在的当地date）

拟create sp语句：

-- =====================================================================================
-- Author: bluetata
-- ALTER date: 13-Oct-2017
-- Description:
-- Get the current date from the table SysCurrentDate
-- If no item in the table, return GETDATE()
-- else
--		if CurrentTime is not null
--			return static date and time from current date
--		else
--			return static date from CurrentDate and running time from GETDATE()
-- =====================================================================================
CREATE PROCEDURE [dbo].[sys_sp_GetCurrentDate]

AS
BEGIN

DECLARE @CurrentDate datetime = NULL
DECLARE @CurrentTime datetime = NULL

DECLARE @ReturnDate datetime = NULL

SELECT TOP 1 @CurrentDate = CurrentDate, @CurrentTime = CurrentTime FROM SysCurrentDate

IF(@CurrentDate IS NOT NULL)
BEGIN

IF(@CurrentTime IS NULL)
BEGIN
SET @ReturnDate = CONVERT(varchar(20),CONVERT(date, @CurrentDate)) + ' ' + convert(varchar(10), GETDATE(), 108)
END
ELSE
BEGIN
SET @ReturnDate = CONVERT(varchar(20),CONVERT(date, @CurrentDate)) + ' ' + convert(varchar(10), @CurrentTime, 108)
END

END
ELSE
BEGIN
SET @ReturnDate = GETDATE()
END

SELECT @ReturnDate AS CurrentDate

END

注：本文原创由`bluetata`发布于blog.csdn.net、转载请务必注明出处。