MySQL advanced data filtering

Combined where clause

and operator

SELECT * FROM products WHERE vend_id = 'DLL01' AND prod_price <= 4;

OR operator

SELECT * FROM products WHERE vend_id = 'DLL01' OR vend_id = 'BRS01';

Evaluation order

SELECT * FROM products WHERE (vend_id = 'DLL01' OR vend_id = 'BRS01') AND prod_price >= 10;
SELECT * FROM products WHERE vend_id = 'DLL01' OR vend_id = 'BRS01' AND prod_price >= 10;

IN operator

SELECT * FROM products WHERE vend_id IN ('DLL01', 'BRS01') ORDER BY prod_name;

NOT operator

SELECT * FROM products WHERE NOT vend_id = 'DLL01';