查询语言.groupBy

    用法如下

    2. Db::table('test', 'tid as id,tname as value')->
    4. groupBy('id')->
    6. groupBy('name')->
    8. getAll();
    10. # SELECT `test`.`tid` AS `id`,`test`.`tname` AS `value`  FROM `test`  GROUP BY `post`.`id`
    14. getAll();
    16. # SELECT `test`.`tid` AS `id`,`test`.`tname` AS `value`  FROM `test`  GROUP BY SUM(`test`.`num`) 
    17. Db::table('test', 'tid as id,tname as value')->
    19. groupBy('{SUM([num])}')->
    21. getAll();
    25. groupBy("title,id,{concat('1234',[id],'ttt')}")->
    27. getAll();
    29. # SELECT `test`.`tid` AS `id`,`test`.`tname` AS `value`  FROM `test`  GROUP BY `test`.`title`,`test`.`id`,`test`.`ttt`,`test`.`value`
    30. Db::table('test', 'tid as id,tname as value')->
    32. groupBy(['title,id,ttt', 'value'])->
    34. getAll();