C:\>mysql -uroot -p
Enter password: ******
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mysql> USE mysql;
Database changed
mysql> DELETE FROM user WHERE (User='pete' AND Host='%') OR (User='fred' and Host='%');
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT User,Host FROM user WHERE User='pete' AND Host='%';
Empty set (0.00 sec)

mysql> CREATE user 'pete'@'%' IDENTIFIED  BY 'pete1234';
Query OK, 0 rows affected (0.01 sec)

mysql> UPDATE user SET User='fred' WHERE User='pete' AND Host='%';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> SELECT User,Host FROM user WHERE User='fred' AND Host='%';
+------+------+
| User | Host |
+------+------+
| fred | %    |
+------+------+
1 row in set (0.00 sec)

mysql> UPDATE `user` SET `Select_priv`='Y' WHERE User='fred' AND Host='%';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> ALTER user 'fred'@'%' IDENTIFIED  BY 'fred5678';
ERROR 1396 (HY000): Operation ALTER USER failed for 'fred'@'%'
mysql> ALTER user 'fred'@'%' IDENTIFIED  BY 'fred5678';
Query OK, 0 rows affected (0.01 sec)

mysql> SELECT User,Host FROM user WHERE User='pete' AND Host='%';
Empty set (0.00 sec)

mysql> CREATE user 'pete'@'%' IDENTIFIED  BY 'pete1234';
Query OK, 0 rows affected (0.01 sec)

mysql> DELETE FROM user WHERE User='pete' AND Host='%';
Query OK, 1 row affected (0.00 sec)

mysql> SELECT User,Host FROM user WHERE User='pete' AND Host='%';
Empty set (0.00 sec)

mysql> CREATE user 'pete'@'%' IDENTIFIED  BY 'pete1234';
ERROR 1396 (HY000): Operation CREATE USER failed for 'pete'@'%'
mysql> CREATE user 'pete'@'%' IDENTIFIED  BY 'pete1234';
Query OK, 0 rows affected (0.01 sec)

mysql> DELETE FROM user WHERE (User='pete' AND Host='%') OR (User='fred' and Host='%');
Query OK, 2 rows affected (0.00 sec)

mysql> SELECT User,Host FROM user WHERE User='pete' AND Host='%';
Empty set (0.00 sec)

mysql> CREATE user 'pete'@'%' IDENTIFIED  BY 'pete1234';
ERROR 1396 (HY000): Operation CREATE USER failed for 'pete'@'%'
mysql> CREATE user 'pete'@'%' IDENTIFIED  BY 'pete1234';
Query OK, 0 rows affected (0.01 sec)

mysql> UPDATE user SET User='fred' WHERE User='pete' AND Host='%';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> SELECT User,Host FROM user WHERE User='fred' AND Host='%';
+------+------+
| User | Host |
+------+------+
| fred | %    |
+------+------+
1 row in set (0.00 sec)

mysql> UPDATE `user` SET `Select_priv`='Y' WHERE User='fred' AND Host='%';
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> ALTER user 'fred'@'%' IDENTIFIED  BY 'fred5678';
ERROR 1396 (HY000): Operation ALTER USER failed for 'fred'@'%'
mysql> ALTER user 'fred'@'%' IDENTIFIED  BY 'fred5678';
Query OK, 0 rows affected (0.01 sec)

mysql> SELECT User,Host FROM user WHERE User='pete' AND Host='%';
Empty set (0.00 sec)

mysql> CREATE user 'pete'@'%' IDENTIFIED  BY 'pete1234';
Query OK, 0 rows affected (0.01 sec)

mysql> DELETE FROM user WHERE User='pete' AND Host='%';
Query OK, 1 row affected (0.00 sec)

mysql> SELECT User,Host FROM user WHERE User='pete' AND Host='%';
Empty set (0.00 sec)

mysql> CREATE user 'pete'@'%' IDENTIFIED  BY 'pete1234';
ERROR 1396 (HY000): Operation CREATE USER failed for 'pete'@'%'
mysql> CREATE user 'pete'@'%' IDENTIFIED  BY 'pete1234';
Query OK, 0 rows affected (0.01 sec)

mysql> quit
Bye

C:\>