MySQL数据库多表多条记录的多个字段合并成⼀条记录MySQL数据库多表多条记录的多个字段合并成⼀条记录
SELECT
o.id,
o.business,
o.store_code,
mysql语句多表查询o.mobile,
p.payment_num
FROMtypescript阮一峰教程
django框架问题t_bill_order AS o
INNER JOIN t_bill_payment AS p ansaction_num = p.transaction_num
der_id = p.order_id
ORDER BY
o.id
变成
SELECT
o.id,
o.business,
o.store_code,
p.payment_num
FROM
t_bill_order AS o
INNER JOIN t_bill_payment AS p ansaction_num = p.transaction_num
der_id = p.order_id
GROUP BY
o.id
ORDER BY
o.id
GROUP_CONCAT ⼀定和 GROUP BY ⼀起⽤ 不是 ORDER BY
中间⽤ 分号隔开 SEPARATOR ‘;’flash播放器哪个好
SELECT
o.business,
o.store_code,
concat(GROUP_CONCAT( DISTINCT IFNULL(p.payment_num,'') SEPARATOR ';'),",",GROUP_CONCAT( DISTINCT IFNULL(v.payment_num,'') SEPA RATOR ';')) AS payment_num
FROM
t_bill_order AS o
sql server查看数据库版本
journal of materiomicsLEFT JOIN t_bill_payment AS p ansaction_num = p.transaction_num der_id = p.order_id
LEFT JOIN t_bill_vcp as v    ansaction_num = v.transaction_num der_id = v.order_id
der_id like concat('1615207339774143001','%')
GROUP BY o.id
ORDER der_time desc, o.id desc
p.payment_num 为null 改成 ‘’ 不然sql语句查询会少

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