我有這對另一個表連接的查詢:如何在不重複數據的情況下進行查詢?
select * from tbl_scales s
join tbl_recipes r on r.category_id = s.product_id
,它顯示這樣的冗餘數據,
scale_id r_id date recipe_name
1 1 2012-05-20 Cheese Bread
6 1 2012-05-21 Cheese Bread
1 1 2012-05-20 Spanish Bread
6 1 2012-05-21 Spanish Bread
3 4 2012-05-20 Pancake
8 4 2012-05-21 Pancake
1 1 2012-05-20 Pandesal
6 1 2012-05-21 Pandesal
我不知道該怎麼辦this..can別人的幫助我?
什麼是重複,每一行都不一樣。 – xdazz