SQL中的日期时间类型转换

Question

I am getting data from some external datasource and need to store in SQL server table. But one filed in it is Datetime. But I am getting that datetime field as Varchar format, and now in my SQL table I need to save it as DateTime datatype.

CONVERT(DATETIME,[Date_time],03) 

-- This code work in my Development Environment but not in Production.

CONVERT(DATETIME,[Date_time],120) 

-- This code work in my Production but not in development.

This make my life difficult to transfer code from development to Production since I have to make changes in tested code.

Please note that I am using SQL server 2008 R2.

Is there anyway that I can make code similar? I cannot change the culture and language on both server since many other applications are deployed there and it might break existing application in both server.

Answer 1

A workaround for your problem would be to provide a feature that calculates (or defines) the correct style for each environment. This simplest option would be a user-defined function.

CREATE FUNCTION [dbo].[fnCustomDateStyle]()
RETURN int AS
BEGIN
  RETURN 3 # Or 120, in the other environment
END

Which can be used in every environment thus:

CONVERT(DATETIME, [Date_Time], fnCustomDateStyle())

Answer 2

You can try to use a SET statement to override the date format, something like this:

SET DATEFORMAT mdy;
SELECT CONVERT(DATETIME, [Date_Time], 120);

As long as you include this code in your stored procedure/query on both environments, this should be fine. You may want to read up about this on MSDN .