mysql - 在mysql中的两个数据库之间在mysql中触发

Question

当一行插入到 db1 中的 tbl1 时，我需要两个数据库之间的触发器，该行插入到 db2 中的 tbl2。

CREATE TRIGGER `update_users` AFTER INSERT ON `db1`.`tbl1`
FOR EACH ROW INSERT INTO `db2`.`tbl2` (id,email,password)
VALUES
(???)

VALUES里写的是什么？？

Answer 1

看例子:

mysql> CREATE DATABASE `db1`;
Query OK, 1 row affected (0.00 sec)

mysql> CREATE DATABASE `db2`;
Query OK, 1 row affected (0.00 sec)

mysql> USE `db1`;
Database changed

mysql> CREATE TABLE `tbl1` (
    ->     `id` INT UNSIGNED,
    ->     `email` VARCHAR(255),
    ->     `password` VARCHAR(255)
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql> DELIMITER //

mysql> CREATE TRIGGER `update_users` AFTER INSERT ON `tbl1`
    -> FOR EACH ROW
    -> BEGIN
    ->     INSERT INTO `db2`.`tbl2` (`id`, `email`, `password`)
    ->     VALUES
    ->     (NEW.`id`, NEW.`email`, NEW.`password`);
    -> END//
Query OK, 0 rows affected (0.00 sec)

mysql> DELIMITER ;

mysql> USE `db2`;
Database changed

mysql> CREATE TABLE `tbl2` (
    ->     `id` INT UNSIGNED,
    ->     `email` VARCHAR(255),
    ->     `password` VARCHAR(255)
    -> );
Query OK, 0 rows affected (0.00 sec)

mysql> USE `db1`;
Database changed

mysql> INSERT INTO `tbl1` VALUES (1, 'email@email.net', 'secret');
Query OK, 1 row affected (0.00 sec)

mysql> SELECT `id`, `email`, `password` FROM `tbl1`;
+------+-----------------+----------+
| id   | email           | password |
+------+-----------------+----------+
|    1 | email@email.net | secret   |
+------+-----------------+----------+
1 row in set (0.00 sec)

mysql> SELECT `id`, `email`, `password` FROM `db2`.`tbl2`;
+------+-----------------+----------+
| id   | email           | password |
+------+-----------------+----------+
|    1 | email@email.net | secret   |
+------+-----------------+----------+
1 row in set (0.00 sec)