在SQLServer上执行SQL脚本期间如何显示某些内容？

问题描述

例如。我有一个数据库升级脚本，用于向数据库表添加列。看起来有点像这样：

For example. I have a database upgrade script for adding a column to a database table. It looks a little like this:

IF NOT Exists(SELECT * FROM SysColumns sc, SysObjects so
              WHERE sc.Name = 'dealer_number'
              AND so.Name = 'collector'
              AND so.Type= 'U'
              AND so.id = sc.id)
BEGIN
 -- SQL for creating column
END
ELSE
BEGIN
 -- notify user that column already exists
END

如何通知用户该列已存在？

How do I notify the user that the column already exists?

推荐答案

RAISERROR ('column already exists',0,1)  with nowait

或

print 'column already exists'

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