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mysql join

i want to join two tables together currently i am selecting from the code table

SELECT userip, datef, quiz, username, sum(category) as category, count(qid) as qid FROM codes group by quiz,username ORDER BY category
but i also wants to select fields from the enterused table where code and enterused table quiz value is the same
CREATE TABLE `enterused` (
  `id` int(10) NOT NULL auto_increment,
  `randomcode` varchar(100) NOT NULL,
  `category` varchar(50) NOT NULL,
  `quiz` varchar(100) NOT NULL,
  `datef` varchar(30) default NULL,
  `type` int(10) default NULL,
  PRIMARY KEY  (`id`)
1 Solution
Kevin CrossChief Technology OfficerCommented:
If there is always a match or you only want rows that have both tables for data, use an INNER JOIN.


SELECT c.username, e.type
FROM codes c
INNER JOIN enterused e ON e.quiz = c.quiz

If there may not be a value in enterused, then use LEFT OUTER JOIN.


SELECT c.username, e.type
FROM codes c
LEFT OUTER JOIN enterused e ON e.quiz = c.quiz

When there is not a match, e.type in this example will be NULL.

If other way around, you can use RIGHT OUTER JOIN or just switch the order of the tables with LEFT OUTER JOIN.
mattibuttAuthor Commented:
thanks buddy its good to hear from you after a while i did manage to do it
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