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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