thinkPHP简单实现多个子查询语句的方法

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发布时间：2018-05-03 16:31:24

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来源于php中文网

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这篇文章主要介绍了thinkphp简单实现多个子查询语句的方法,结合实例形式对比分析了thinkphp中子查询语句的具体实现技巧,需要的朋友可以参考下

本文实例讲述了thinkPHP简单实现多个子查询语句的方法。分享给大家供大家参考，具体如下：

sql语句博大精深

理解好sql语句，就能用好thinkphp等框架中的数据库操作

原sql：

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SELECT a.*,b.* from (SELECT a.id as opener_id,a.name,sum(c.money) as bonus_money,c.year,c.month from sh_opener a
LEFT JOIN sh_opener_bonus b on a.id = b.opener_id
LEFT JOIN sh_incentive c on b.incentive_id = c.id
where a.agent_id = 3 and a.status = 1 and c.year = 2015 and c.month = 11
GROUP BY a.id,c.year,c.month) a
LEFT JOIN (SELECT a.id as payment_id,a.opener_id,a.money as payment_money,a.trode_number from sh_opener_bonus_payment a
where a.year = 2015 and a.`month` = 11 and a.agent_id = 3) b
on a.opener_id = b.opener_id;

这里面有两个子查询语句，其实子查询语句也是表，只不过是存在内存中罢了。

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thinkphp实现：

$useYear = date('Y',strtotime('last month'));
$this->assign('useYear',$useYear);
$useMonth = date('m',strtotime('last month'));
$this->assign('useMonth',$useMonth);
// 获取上一月人员的奖金金额
// 子查询1
$whereSub1['a.agent_id'] = $this->agent_id;
$whereSub1['a.status'] = 1;
$whereSub1['c.year'] = $useYear;
$whereSub1['c.month'] = $useMonth;
$subQuery1 = M()->table('sh_opener a')->join('sh_opener_bonus b on a.id = b.opener_id')->join('sh_incentive c on b.incentive_id = c.id')->where($whereSub1)->group('a.id,c.year,c.month')->field('a.id,a.name,sum(c.money) as bonus_money,c.year,c.month')->select(false);
// 子查询2
$whereSub2['a.agent_id'] = $this->agent_id;
$whereSub2['a.year'] = $useYear;
$whereSub2['a.month'] = $useMonth;
$subQuery2 = M()->table('sh_opener_bonus_payment a')->where($whereSub2)->field('a.id as payment_id,a.opener_id,a.money as payment_money,a.trode_number')->select(false);
$list = M()->table($subQuery1.' a')->join($subQuery2.' b on a.id = b.opener_id')->select();
$this->assign('list',$list);

其实thinkphp框架对sql的封装，最终还是要拼凑成sql语句。