我尝试根据渠道和产品名称列计算收入总和,以下是我在Codeigniter中使用的查询: $datas['row']=$this->db->query('SELECT channel,product_name, SUM(revenue) AS revenue FROM contribution WHERE YEAR(date) = 2019 GROUP BY channel, SUBSTRING(product_name, 1, 3)')->resu
Select SUM(IF(CPaymentType='Check', CAmount, 0)) as PaymentAmountCheck, from TableOrderPayment
where CPaymentType IN ('Check','Cash') and CDate<=SYSDATETIME() and CSta
我有两个表:拍卖行、和properties。一对多的关系。每一次拍卖都包含许多财产。我试图直接查询属性,但我需要将WHERE子句应用于2列:、property.desc、和auction.code。('desc','LIKE', "%$search%")问题是,第一个查询雄辩的执行是:
SELECT co
在线课程脚本 SELECT l.`id` as parent_lesson_id, l.bigImageURL, l.name, WHERE lesson_id = parent_lesson_id AND user_id = 52461 ORDER BY `percent` DESC LIMIT在运行此查询时,将收到以下错误消息:
#1054 - Unknown colum