Increment/Deincrment value in MySQL

Question

Table:

What I am trying to do is ++ or -- the ORD value by selecting the id_phonebook.

Query:

SELECT * FROM phonebook WHERE id_phonebook = '$entry_id' ALTER ORD-1 

Am I going the right way about this or do I need to make this query more sophisticated? Not much of a DB Admin.

Answer 1

I believe you need an UPDATE statement.

To increment:

update phonebook set ord=ord +1 where id_phonebook = '$entry_id'

To decrement:

update phonebook set ord=ord -1 where id_phonebook = '$entry_id'

Reference:

• https://dev.mysql.com/doc/refman/5.0/en/update.html