转载Sql 获取数据库所有表及其字段名称，类型，长度

Posted 2020-07-01 新西兰程序员

转载原地址

http://www.cnblogs.com/Fooo/archive/2009/08/27/1554769.html

SELECT 
    (case when a.colorder=1 then d.name else \'\' end) 表名,
    a.colorder 字段序号,
    a.name 字段名,
    (case when COLUMNPROPERTY( a.id,a.name,\'IsIdentity\')=1 then \'√\'else \'\' end) 标识,
    (case when (SELECT count(*) 
                FROM sysobjects 
                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) 主键,
    b.name 类型,
    a.length 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) 允许空,
    isnull(e.text,\'\') 默认值,
    isnull(g.[value],\'\') AS 字段说明    

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 sysproperties g on a.id=g.id AND a.colid = g.smallid   --where d.name=\'child\'
order by a.id,a.colorder