读取SQLServer 数据表结构

刚好需要这个过程, 在网上找了几个, 感觉都差一些, 其SQL都特别长. 而且我特别需要用到聚类索引, 自己写了个, 这是程序开发使用到的版本.

select o.name tablename, c.name fieldname, t.name fieldtype, columnproperty(c.id,c.name,'PRECISION') fieldlen, c.Scale,c.length,
c.colid fieldorder, c.isnullable,
case when c.colid in(select ik.colid
from sysindexes i, Sysindexkeys ik, sysobjects oo
where i.id=ik.id and i.indid=ik.indid
and i.name=oo.name and oo.xtype='PK' --主键
and o.id=i.id
) then 1 else 0 end isPrimaryKey,
case when c.colid in(select ik.colid
from sysindexes i, Sysindexkeys ik
where i.id=ik.id and i.indid=ik.indid
and o.id=i.id and i.indid=1 --聚类索引
) then 1 else 0 end isClusterKey,
columnproperty( c.id, c.name,'IsIdentity') IsIdentity,
isnull(m.text,'') defaultvalue
from sysobjects o, syscolumns c, systypes t, syscomments m
where o.xtype='U'
and o.id=c.id
and c.xtype=t.xtype
and c.cdefault*=m.id
order by o.name, c.colid

程序使用到的版本是否用0/1表示, 如果用在文档整理, 难看得要命, 优化了个文档版本的,在查询分析器找出来还是蛮好看的.

select case when c.colid=1 then o.name else '' end 表名,
c.colid 顺序,
c.name 字段名,
t.name 字段类型,
columnproperty(c.id,c.name,'PRECISION') 字段长度,
isnull(c.Scale,'') 小数位,
c.length 占用字节,
case when c.isnullable=1 then '√' else '' end 可为空,
case when c.colid in(select ik.colid
from sysindexes i, Sysindexkeys ik, sysobjects oo
where i.id=ik.id and i.indid=ik.indid
and i.name=oo.name and oo.xtype='PK' --主键
and o.id=i.id
) then '√' else '' end 主键,
case when c.colid in(select ik.colid
from sysindexes i, Sysindexkeys ik
where i.id=ik.id and i.indid=ik.indid
and o.id=i.id and i.indid=1 --聚类索引
) then '√' else '' end 聚类索引,
case when columnproperty( c.id, c.name,'IsIdentity')=1 then '√' else '' end 自增长,
isnull(m.text,'') 默认值
from sysobjects o, syscolumns c, systypes t, syscomments m
where o.xtype='U'
and o.id=c.id
and c.xtype=t.xtype
and c.cdefault*=m.id
order by o.name, c.colid