You could make the column a unique key...that would prevent duplicates from
being entered. Then if you want to be able to try inserting duplicates (like
if you don't want the query to fail on duplicate attempts), you could do
INSERT IGNORE INTO myTable ...
Check http://www.mysql.com/doc/en/CREATE_
Add a UNIQUE INDEX to the table you are inserting to. You will then get
an error if you try to insert a second time with the same values.
Alternativly you could use perform a select and then an insert within
the same transaction, determining whether something exists in the db
before inserting. Th
If you wanted to use MyISAM tables and peform an initial select to
determine whether you should insert, you could lock the table you would
be selecting/insert from. 'LOCK TABLES table_name WRITE' Don't forget
to unlock the table when you are done 'UNLOCK TABLES', otherwise you
will likely have de
