使用WordPress $wpdb获取按2列排序的行结果

我有” 交易” 表：

id user amount currency plan_id 1111usd1 219usd2 3110usd2 4210usd7 517eur3 615eur3 716eur4 833usd8

我想获取按货币排序的金额总和, 然后按每个给定用户的plan_id：$ results [currency] [plan_id]

$results['usd'][1] = 11 $results['usd'][2] = 19 $results['eur'][3] = 12 $results['eur'][4] = 6

到目前为止, 我有：

$query = ' SELECT plan_id, currency, SUM( amount ) as earnings FROM transactions WHERE user = 1 GROUP BY currency, plan_id '; $results = $wpdb-> get_results( $query, OBJECT_K );

但是它只返回按plan_id定期排序的行, 而忽略按货币排序：

Array ( [1] => stdClass Object ( [plan_id] => 1 [currency] => usd [earnings] => 11 ) [2] => stdClass Object ( [plan_id] => 2 [currency] => usd [earnings] => 19 ) [3] => stdClass Object ( [plan_id] => 3 [currency] => eur [earnings] => 12 ) [7] => stdClass Object ( [plan_id] => 7 [currency] => eur [earnings] => 6 ) )

$ wpdb甚至有可能吗？
请帮忙。谢谢
#1你需要告诉MySQL如何使用ORDER BY子句对结果进行排序(查询中缺少)。
【使用WordPress $wpdb获取按2列排序的行结果】这将产生你想要的结果：

SELECT `plan_id`, `currency`, SUM( `amount` ) AS `earnings` FROM `transactions` WHERE `user` = 1 GROUP BY `currency`, `plan_id` ORDER BY `currency` DESC, `plan_id` ASC