mysql查询总结相关

#查询之后添加序号递增一列：

SELECT CONVERT((@rowNum := @rowNum + 1),CHAR(10)) AS 序号,
temp.* 
FROM(
SELECT h.applyNo '订单编号',
IFNULL(p.name, c.shortName) '出借人姓名',
h.productNo '产品编号', 
pb.`productName` '产品名称',
h.investAmount '订单金额',
h.`payDate` '支付时间',
DATE_FORMAT(er.repayDate, '%Y-%m-%d') '到账时间'

FROM dq_order_header h
LEFT JOIN jz_user u ON h.`uid`=u.`id`
LEFT JOIN `jz_person` p ON h.`uid`=p.`uid`
LEFT JOIN `jz_company` c ON h.uid =c.uid
LEFT JOIN jinzhu.`dq_product_base` pb ON h.`productNo`=pb.`productNo`
LEFT JOIN (SELECT a.applyNo, MAX(a.repayDate) repayDate FROM dq_order_expect_receivable a WHERE a.status!='SETTLED' GROUP BY a.applyNo) er ON h.applyNo=er.applyNo
LEFT JOIN (SELECT COUNT(0) liquidation, a.uid, MAX(a.createDate) liquidationDate FROM `jz_liquidation_record` a WHERE a.contractType IN ('DebtTransContract','DebtTransNotice') GROUP BY a.uid) li ON h.`uid`=li.uid
LEFT JOIN `dq_zz_order_header` zo ON h.zzApplyNo=zo.zzApplyNo
LEFT JOIN `dq_zz_product_info` zp ON zo.zzProductNo = zp.zzProductNo
LEFT JOIN (SELECT COUNT(0) liquidation, a.uid, MAX(a.createDate) liquidationDate FROM `jz_liquidation_record` a WHERE a.contractType IN ('DebtTransContract','DebtTransNotice') GROUP BY a.uid) zli ON zp.uid = zli.uid
WHERE h.`investStatus`='CHECKED'
ORDER BY er.repayDate, h.`payDate`
)temp,(SELECT @rowNum := 0) rn