Greetings,
Thank you Dahl and Xiaobo. Here it is working for all to see. I
particularly like that it doesn't try to use a key again once it is
deleted.
Joe.
mysql> use names;
Database changed
mysql> create table people ( id mediumint unsigned not null
auto_increment,
-> first char(20),
-> last char(20),
-> primary key (id) );
Query OK, 0 rows affected (0.20 sec)
mysql> describe people;
+-------+-----------------------+------+-----+---------
+----------------+
| Field | Type | Null | Key | Default |
Extra |
+-------+-----------------------+------+-----+---------
+----------------+
| id | mediumint(8) unsigned | | PRI | NULL |
auto_increment |
| first | char(20) | YES | | NULL
| |
| last | char(20) | YES | | NULL
| |
+-------+-----------------------+------+-----+---------
+----------------+
3 rows in set (0.02 sec)
mysql> insert into people (first, last) values ("john", "smith");
Query OK, 1 row affected (0.00 sec)
mysql> insert into people (first, last) values ("bob", "jones");
Query OK, 1 row affected (0.13 sec)
mysql> insert into people (first, last) values ("brad", "pitt");
Query OK, 1 row affected (0.00 sec)
mysql> select * from people;
+----+-------+-------+
| id | first | last |
+----+-------+-------+
| 1 | john | smith |
| 2 | bob | jones |
| 3 | brad | pitt |
+----+-------+-------+
3 rows in set (0.02 sec)
mysql> delete from people where last = 'smith';
Query OK, 1 row affected (0.00 sec)
mysql> select * from people;
+----+-------+-------+
| id | first | last |
+----+-------+-------+
| 2 | bob | jones |
| 3 | brad | pitt |
+----+-------+-------+
2 rows in set (0.00 sec)
mysql> insert into people (first, last) values ("john", "smith");
Query OK, 1 row affected (0.06 sec)
mysql> select * from people;
+----+-------+-------+
| id | first | last |
+----+-------+-------+
| 4 | john | smith |
| 2 | bob | jones |
| 3 | brad | pitt |
+----+-------+-------+
3 rows in set (0.21 sec)
mysql>
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