tp5 使用buildSql、union

如题，SQL语句是这样的，如下所示，不用管表里内容是什么，只要知道wygl_sfgl_mxb根据条件查询出的结果与wygl_sfgl_sjjz表根据条件查出来的结果作为a表，再与b表c表左联然后再根据条件查询需要的数据，也不难，但是咱之前没这么搞过啊~~~，再说table里也不能写（SELECT yf,sfxmbh,xqh,sl,je,0 AS hs FROM wygl_sfgl_mxb WHERE je > 0 UNION ALL SELECT yf,sfxmbh,xqh,sl,je,1 AS hs FROM wygl_sfgl_sjjz WHERE je > 0）啊，写上会报错，我试过了~原生查询也不是不行，就是那么一大坨，看着就恶心，而且还要分页，SQL server的分页到现在也没弄明白怎么回事，我也不想弄明白~~~最后在度娘的领导下，经过CSDN，博客园的不懈努力………，终于，找到了正确的写法，如下

$sql1 = Db::connect($this->config)->table('wygl_sfgl_mxb')->field('yf,sfxmbh,xqh,sl,je,0 AS hs')->where('je', '>','0')->buildSql();
        $sql3 = Db::connect($this->config)->table('wygl_sfgl_sjjz')->field('yf,sfxmbh,xqh,sl,je,1 AS hs')->where('je','>','0')->union([$sql1])->buildSql();
        $res = Db::connect($this->config)
            ->table($sql3)
            ->alias('a')
            ->leftJoin('wygl_sfxm b','a.sfxmbh= b.dm')
            ->leftJoin('sys_qx_sjqx qx','a.xqh= qx.xmdm')
            ->field('a.yf,a.sfxmbh,b.mc,COUNT ( 1 ) AS yshs,SUM ( a.sl ) AS yssl,SUM ( a.je ) AS ysje,SUM ( a.hs ) AS yishs,SUM ( a.hs* a.sl ) yissl,SUM ( a.hs* a.je ) AS yisje,SUM ( a.hs- 1 ) * ( - 1 ) AS wshs,SUM ( ( a.hs- 1 ) * a.sl ) * ( - 1 ) AS wssl,SUM ( ( a.hs- 1 ) * a.je ) * ( - 1 ) AS wsje ')
            ->where($map)
            ->group('a.yf ,a.sfxmbh,b.mc')
            ->order(["yf"=>"desc","sfxmbh","mc"])
            ->paginate(20);

上面是解决的tp5写法，下面是原始SQL语句，数据库背景是SQL server。

SELECT TOP
    100 a.yf,
    b.mc,
    COUNT ( 1 ) AS yshs,
    SUM ( a.sl ) AS yssl,
    SUM ( a.je ) AS ysje,
    SUM ( a.hs ) AS yishs,
    SUM ( a.hs* a.sl ) yissl,
    SUM ( a.hs* a.je ) AS yisje,
    SUM ( a.hs- 1 ) * ( - 1 ) AS wshs,
    SUM ( ( a.hs- 1 ) * a.sl ) * ( - 1 ) AS wssl,
    SUM ( ( a.hs- 1 ) * a.je ) * ( - 1 ) AS wsje 
FROM
    (SELECT yf,sfxmbh,xqh,sl,je,0 AS hs FROM wygl_sfgl_mxb WHERE je > 0 UNION ALL SELECT yf,sfxmbh,xqh,sl,je,1 AS hs FROM wygl_sfgl_sjjz WHERE je > 0 ) a
    LEFT OUTER JOIN wygl_sfxm b ON a.sfxmbh= b.dm
    LEFT OUTER JOIN sys_qx_sjqx qx ON a.xqh= qx.xmdm 
WHERE
    a.yf>= '19700101' 
    AND a.yf <= '20200917' 
    AND qx.flag= 1 
    AND qx.dm= '1003' 
GROUP BY
    a.yf ,
    a.sfxmbh,
    b.mc 
ORDER BY
    a.yf DESC,
    a.sfxmbh,
    b.mc