insert multiple rows into sql using in statement - sql

Question

I am trying to write an sql script to do a bulk insert. I need it to add the users that are managers into the manager's group. I tried to write it like this
INSERT INTO group_member (group_id, user_id) VALUES ((SELECT group_id FROM user_group WHERE group_name = 'Manager') , (SELECT user_id
FROM user WHERE manager=1 and user_status = 1));
but I am getting this error
Subquery returns more than 1 row
I understand the error but am not sure how to work around it so that I do not miss any users.
When run there can be 0 to many managers, not sure if that will make a difference.
sql version: 5.6.27
CREATE TABLE user_group(
group_id INT(11) NOT NULL AUTO_INCREMENT,
group_name VARCHAR(128) NULL DEFAULT NULL,
PRIMARY KEY (group_id)
);
CREATE TABLE user (
user_id INT(11) NOT NULL AUTO_INCREMENT,
user_name VARCHAR(128) NULL DEFAULT NULL,
manager INT(11) NOT NULL
user_status INT(11) NOT NULL
PRIMARY KEY (user_id)
);
CREATE TABLE group_member (
group_id INT(11) NOT NULL,
user_id INT(11) NOT NULL,
PRIMARY KEY (group_id, user_id)
);

Answer 1

You want insert . . . select:
INSERT INTO group_member (group_id, user_id)
SELECT g.group_id, u.user_id
FROM (SELECT group_id FROM user_group WHERE group_name = 'Manager') g CROSS JOIN
(SELECT user_id FROM user WHERE manager = 1 and user_status = 1) u;
If the group already has members, you might want to filter them out.
You can also write this as:
INSERT INTO group_member (group_id, user_id)
SELECT g.group_id, u.user_id
FROM user u JOIN
user_group g
ON g.group_name = 'Manager' AND
(u.manager = 1 and u.user_status = 1);

Answer 2

I need it to add the users that are managers into the manager's group
INSERT INTO group_member (group_id, user_id)
SELECT (SELECT group_id FROM `group` WHERE group_name = 'Manager'),
user_id
FROM user WHERE manager=1 and user_status = 1;
Of course, there must be only one group with the name of Manager.
Test
mysql> SELECT * FROM `user`;
+---------+-------------+---------+
| manager | user_status | user_id |
+---------+-------------+---------+
| 1 | 1 | 1 |
| 1 | 1 | 2 |
+---------+-------------+---------+
2 rows in set (0.00 sec)
mysql> SELECT * FROM `group`;
+----------+------------+
| group_id | group_name |
+----------+------------+
| 17 | Manager |
+----------+------------+
1 row in set (0.00 sec)
mysql> INSERT INTO group_member (group_id, user_id)
-> SELECT (SELECT group_id FROM `group` WHERE group_name = 'Manager'),
-> user_id
-> FROM user WHERE manager=1 and user_status = 1;
Query OK, 2 rows affected (0.08 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> select * FROM group_member;
+----------+---------+
| group_id | user_id |
+----------+---------+
| 17 | 1 |
| 17 | 2 |
+----------+---------+
2 rows in set (0.00 sec)