插入选择语句

Question

我的以下声明有什么问题？

$result = $conn->query("INSERT INTO studentenrolledteacher (student_id,teacher,subject) VALUES   select student_id from studentprofile WHERE lastname='marco','1','2'");` 

Answer 1

您想要insert . . . select。 Values不是语法的一部分：

insert into studentenrolledteacher (student_id, teacher, subject)
    select student_id, 1, 2
    from studentprofile 
    where lastname = 'marco';