How to count the number of 02 tables |
Hi every body ?
I have 2 table data: db_category: +idcate +name db_book: + idbook + name + idcate Now I want to count the number by category. Example: Book 1: 2 file Book 2: 5 file Please help me, thanks
This makes no sense at all.
example Code: SELECT cat_a 12 cat_b 10 |
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