mysql - 多行插入语句包含相同的选择字段

Question

我必须进行多次插入，但所有这些新记录都将具有从其他表之一检索的相同字段:

INSERT INTO `user` (`id`, `name`, `surname`, `retrieved`) VALUES
(null, "A", "A", SELECT id from user_records where id = 1),
(null, "B", "B", SELECT id from user_records where id = 1),
(null, "C", "C", SELECT id from user_records where id = 1)...

如何插入此选择结果而不执行每个记录？

谢谢

Answer 1

您应该为此使用变量:

SET @VAR := SELECT id 
              FROM user_records 
             WHERE id = 1;

INSERT INTO `user` (`id`, `name`, `surname`, `retrieved`) 
VALUES
(null, "A", "A", @VAR),
(null, "B", "B", @VAR),
(null, "C", "C", @VAR)...

或

SELECT id INTO @VAR 
  FROM user_records 
 WHERE id = 1;

INSERT INTO `user` (`id`, `name`, `surname`, `retrieved`) 
VALUES
(null, "A", "A", @VAR),
(null, "B", "B", @VAR),
(null, "C", "C", @VAR)...