MySQL 查询取决于列值定义 where 语句

Question

我有这个 SQL:

SELECT
  `refnumbers`.`order_id`,
  `refnumbers`.`deal_id`,
  `refnumbers`.`claim_track_id`,
  `deals`.`partner_count`
FROM `refnumbers`
  JOIN `deals`
    ON (`refnumbers`.`deal_id` = `deals`.`ID`)
  JOIN `users`
    ON (`users`.`id` = `deals`.`partner_id`)
WHERE `refnumbers`.`is_claimed` = '1'
    AND `deals`.`partner_id` = '62039'
    AND `refnumbers`.`claimed_at` BETWEEN '2013-01-17 00:00:00'
    AND '2013-01-17 23:59:59'
ORDER BY `refnumbers`.`claimed_at` DESC

如果 deals.partner_count 为 1，我想选择 deals.partner_id = 62039。

如果 partner_count 不是 1 那么它应该选择 refnumbers.claim_track_id = 62039

如何做到这一点？

Answer 1

尝试

where
case when deals.partner_count = 1 
   then deals.partner_id = 62039
   else refnumbers.claim_track_id = 62039
end