我试图编写一个mysql查询,该查询将通过子查询找到要插入的值,并且只将插入到具有指定mysql的id的行中。#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL serverright syntax to use near 'WHERE product_id = '1'&
我创建了一个视图,它显示来自多个表的数据。现在,我想在视图上执行数据操作操作。我怎样才能做到这一点?CREATE DEFINER = `forge`@`%` VIEW `contact_view` AS `c`.`id` AS `id`, `c`.`mname` AS `mname`,
`c`.`lname` AS `lnam
primary key auto_increment, child int not null,) ;select a, b, c from something where condition ;
因此,有时当我运行insert查询时,(父、子)关系可能已经存在并被复制。我不想在(父键、子键)上创建主键,因为这会导致硬失败(查询失败