SQL语句来获取一个表的所有列的信息

本代码适用于: SQLSERVER2000/2005

SQL语句如下：


select c.name, t.name as type, c.length


,(case t.name


when 'nvarchar' then c.length/2


when 'nchar' then c.length/2


else c.length


end)


as reallength


from syscolumns c join systypes t


on c.xtype=t.xtype


where t.name <> 'sysname' and c.id=object_id('Table1')

-- 加了这句代码，可以使列按设计时的顺序输出

order by colorder ASC

为了方便使用，可将其封装成一个函数代码如下：


--


-- 返回一个表的列信息


-- 用法：select * from tbl_columns('Table1')


-- zyl 2007.11.6


--


create function tbl_columns(@tablename nvarchar(256))


returns @tmptb table(


name nvarchar(256),


type varchar(256),


length int,


reallength int


)


begin


insert into @tmptb


select c.name, t.name as type, c.length


,(case t.name


when 'nvarchar' then c.length/2


when 'nchar' then c.length/2


else c.length


end)


as reallength


from syscolumns c join systypes t


on c.xtype=t.xtype


where t.name <> 'sysname' and c.id=object_id(@tablename)


return


end