sql or multiple conditions code example

Example 1: where sql multiple conditions

SELECT *
FROM suppliers
WHERE (state = 'California' AND supplier_id <> 900)
OR (supplier_id = 100);

Example 2: multiple where statements sql

SELECT items.* FROM items i, meta_data m1, meta_data m2
    WHERE i.item_id = m1.item_id and i.item_id = m2.item_id
    AND m1.meta_key = 'lat' AND m1.meta_value >= 55 AND m1.meta_value <= 65
    AND m2.meta_key = 'lng' AND m2.meta_value >= 20 AND m2.meta_value <= 30