I'm using SQL Server 2005/2008. I need to add a column to a table if it does not yet exist. This will apply to all tables in a given database. I hoped I was close, but I'm having issues with this solution.I'm using SQL Server 2005/2008. I need to add a
阅读背景：
如果列不存在于所有表中，请添加一列？
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