Member Avatar for daniyalnawaz

hi,
i have two entities products and categories. both have many-to-many relation. how can i get the products that are not related with the categories. i mean the ones which not not mapped in junction table.

thank you!
daniyal nawaz

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  • Latest Post Latest Post by varmadba

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Member Avatar for pritaeas 
SELECT * FROM products WHERE product_id NOT IN (SELECT DISTINCT product_id FROM junction_table)
Member Avatar for varmadba

Try this :

select products .*,junction_table.product_id from products 
left outer join junction_table
  on junction_table.product_id=products .product_id
having junction_table.product_id is null
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