这是样本表:我已经成功地获得了一个使用查询的输出:SUM(CASE WHEN sid = 'Frank.net Life Cover' THEN1 ELSE 0 END) AS 'Frank.net Life Cover',
SUM(CASE WHEN sid = 'Frank.net Salary Protection' THEN 1 ELSE0 END) AS 'Frank.net Salary Protecti
我可以在mysqlcase语句中使用'AND‘吗$d = $mysqli->query("SELECT id_timeslot, date_book, id_beautician, 'available') AS thera_b
, MAX(CASEb.id_beautician WHEN 2 THEN 'booked
我正在编写一个查询,从名为contracts的表中获取数据,并将其连接到表user_data或teams。以下是我想出的:FROM contracts WHEN contracts.contracteeType = 'user' WHEN contracts.contracteeType = 'team' END as tableName
<e