无分组
select @rownum:=@rownum+1 as autoSeq, sid,pid,oprimary,seq from singlechoice,(select @rownum:=0) r order by pid,sid
单字段分组
select (@i := case when @tableName=a.tablename then @i + 1 else 1 end ) as rowIndex, a.*,(@tableName:=a.tablename) from tablestyle a,(select @i:=0,@tableName:='') as t group by tablename,fieldname order by tablename,(@i := case when @tableName=a.tablename then @i + 1 else 1 end )
多字段分组
select (@i := case when @tableName=concat(a.dbname,a.tablename) then @i + 1 else 1 end ) as rowIndex, a.*,(@tableName:=concat(a.dbname,a.tablename)) as temp from tablestyle a,(select @i:=0,@tableName:='') as t group by dbname,tablename,fieldname order by dbname,tablename,(@i := case when @tableName=concat(a.dbname,a.tablename) then @i + 1 else 1 end )