where sql multiple conditions

1SELECT CASE col1
2	WHEN 'agree' THEN 'Ok'
3	WHEN 'disagree' THEN 'Ko'
4    ELSE
5        CASE 
6            WHEN col2 >= 1 THEN 'Ko'
7            ELSE 'Maybe'
8        END
9END AS my_result
10FROM table_name;

1SELECT *
2FROM suppliers
3WHERE (state = 'California' AND supplier_id <> 900)
4OR (supplier_id = 100);

1SELECT items.* FROM items i, meta_data m1, meta_data m2
2    WHERE i.item_id = m1.item_id and i.item_id = m2.item_id
3    AND m1.meta_key = 'lat' AND m1.meta_value >= 55 AND m1.meta_value <= 65
4    AND m2.meta_key = 'lng' AND m2.meta_value >= 20 AND m2.meta_value <= 30

1SQL> SELECT ID, NAME, SALARY 
2FROM CUSTOMERS
3WHERE SALARY > 2000 OR age < 25;

1+----+----------+----------+
2| ID | NAME     | SALARY   |
3+----+----------+----------+
4|  3 | kaushik  |  2000.00 |
5|  4 | Chaitali |  6500.00 |
6|  5 | Hardik   |  8500.00 |
7|  6 | Komal    |  4500.00 |
8|  7 | Muffy    | 10000.00 |
9+----+----------+----------+
10