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select
(case when a.colorder=1 then d.name else '' end) as 表名,--如果表名相同就返回空 syscolumns(表字段信息表) a sysobjects d
a.colorder as 字段序号,
a.name as 字段名,
(case when columnproperty( a.id,a.name, 'isidentity' )=1 then '√' else '' end) as 标识, --返回isidentity的值,isidentity只有两个值:0、1
(case when (select count(*) from sysobjects--查询主键
where (name in
(select name from sysindexes
where (id = a.id) and (indid in
(select indid from sysindexkeys
where (id = a.id) and (colid in
(select colid from syscolumns
where (id = a.id) and (name = a.name))
)))))
and (xtype = 'pk' ))>0 then '√' else '' end) as 主键,--查询主键end
b.name as 类型, --systypes b
a.length as 占用字节数,
columnproperty(a.id,a.name,'precision' ) as 长度,
isnull(columnproperty(a.id,a.name,'scale' ),0) as 小数位数,
(case when a.isnullable=1 then '√' else '' end) as 允许空,
isnull(e.text,'' ) as 默认值, --syscomments e
isnull(g.[value],'' ) as 字段说明 --sys.extended_properties g (字段信息表)
from syscolumns a left join systypes b
on a.xtype=b.xusertype
inner join sysobjects d
on a.id=d.id and d.xtype='u' and d.name<> 'dtproperties'
left join syscomments e
on a.cdefault=e.id
left join sys.extended_properties g
on a.id=g.major_id and a.colid = g.minor_id
where d.name='systempara' --所要查询的表
order by a.id,a.colorder
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