Question

i’ve this 3 following table

table ads
...
categoryID
subcategoryID


table category
categoryID
description

table subcategory
subCategoryID
description

How can i JOIN this 3 table to have all field from ADS and category description and also subcategory description…

(when i use sql server, i can “design” the relations, but now, i’m using mysql and i haven’t a graphical environment to do it.. and i’m not good to write the sql)

THanks in advance

Answer 1

SELECT 
    ads.*,
    c.description as categoryDescription,
    sc.description as subcategoryDescription,
FROM
    ads 
    INNER JOIN category c ON c.categoryID = ads.categoryID
    INNER JOIN subcategory sc ON sc.subcategoryID = ads.subcategoryID

Note: it is better practice to use an explicit column list rather than ‘*’