工作SQL总结
SELECT SUM(IFNULL(mc.coupon_nominal_value,0)*IFNULL(mc.coupon_count,0)) AS couponCount, SUM( IFNULL(mc.coupon_count,0)) AS couponNum , m.merchant_name AS merchantName, mc.merchant_id AS merchantId,mc.merchant_coupon_id,mcs.merchant_coupon_specification_name AS mcsNameFROM backend.merchant_coupon mc JOIN backend.merchant m ON m.merchant_id=mc.merchant_id JOIN backend.merchant_coupon_specification mcs ON mcs.merchant_coupon_specification_id=mc.coupon_specification_id WHERE mc.is_deleted=0 AND mc.coupon_nominal_value>0 AND mc.coupon_count>0 GROUP BY merchantId,mcsNameSELECT COUNT(DISTINCT mc.coupon_specification_id,mc.merchant_id) FROM backend.merchant_coupon mc WHERE mc.is_deleted=0 AND mc.coupon_nominal_value>0 AND mc.coupon_count>0?
