varchar(max)和nvarchar(max):用来代替Sql 2000里的ntext和text,max可以存储2GB的数据.
原来的text不能在trigger用使用,也不能使用字串符函数,如:substring...
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varbinary(max):用来代替Sql 2000里的image,max可以存储2GB的数据.
原来的image不能在trigger用使用,同上.
xml:以前我们用varchar来存xml字串,现在方便了,搭配ADO.NET和XQuery一起使用.
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