【IT168 技术文档】

    一条语句查询数据库中所有表的信息

SELECT 表名=case when a.colorder=1 then d.name else '' end,
       表说明=case when a.colorder=1 then isnull(f.value,'') else '' end,
       字段序号=a.colorder,
       字段名=a.name,
       标识=case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end,
       主键=case when exists(SELECT 1 FROM sysobjects where xtype='PK' and name in (SELECT name FROM sysindexes WHERE indid in(SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid))) then '√' else '' end,
       类型=b.name,
       占用字节数=a.length,
       长度=COLUMNPROPERTY(a.id,a.name,'PRECISION'),
       小数位数=isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),
       允许空=case when a.isnullable=1 then '√'else '' end,
       默认值=isnull(e.text,''),
       字段说明=isnull(g.[value],'')
   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
       left join sysproperties f on d.id=f.id and f.smallid=0
    --where d.name='此处可添加要查询的表名'
   Order by a.id,a.colorder