mysql 获取表结构 sql

 

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SELECT     表名       = d.name,--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 parent_obj=a.id 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.xusertype=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 left join     sys.extended_properties f on     d.id=f.major_id and f.minor_id=0 where     d.name='表名称'  order by     a.id,a.colorder