Question

i have a search query which will retrieve information from 3 tables i made the query so it retrieve the information from 2 tables and i don’t know if i can combine the third one or not

SELECT *
FROM articles
INNER JOIN terms
ON articles.ArticleID = terms.RelatedID AND terms.TermType = 'article'

the third query is

SELECT * FROM categories where CategoryID in (something)

something is a filed in the articles tables which have value like ‘3,5,8’

i want do this 2 queries into 1 query and i don’t know if it can be done by 1 query or not

Answer 1

without looking at your schema (which would be helpful) and some sample data try this query

SELECT *
FROM categories,articles
INNER JOIN terms
ON (articles.ArticleID = terms.RelatedID AND terms.TermType = 'article')
WHERE
FIND_IN_SET(categories.CategoryID,articles.categories)

here is the definition for FIND_IN_SET()

http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_find-in-set