我有一张表包含3列:年龄,姓名,昵称 我只想得到姓名(+年龄),其中姓名+年龄根本不存在在昵称+年龄。 例如:如果表:DETAILS包含2行: 年龄:5,名:苏子,昵称:苏子 年龄:2,名称:吉尔,昵称:克 查询将返回:年龄:2名:吉 SELECT d1.AGE, d1.NAME
FROM DETAILS d1
WHERE d1.NAME NOT IN (SELECT d2.NICKNAME
我想从一个MYSQL数据库复制架构到其他MYSQL数据库。虽然这样做几张桌子给人的问题如下 Error Code: 1064
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(
SELECT month(dateofappointment), COUNT(*) 'NumberOfAppointments'
FROM appointment
WHERE YEAR(dateofappointment) = '2016'
GROUP BY MONTH(dateofappointment)
这显示我所有月份,但十二月不存在,因为那一年没有任何约会
我这样的查询: SELECT a.id, a.store_id, a.name, a.total_sold, a.updated_at, b.name AS store_name
FROM products a
JOIN stores b ON b.id = a.store_id
JOIN products_categories c ON c.product_id = a.id
WHERE