SELECT * FROM data_table WHERE zone_name = 'Dhaka' AND factory_type = 'Traditional';
SELECT * FROM data_table WHERE zone_name ≠ 'Dhaka';
SELECT * FROM data_table WHERE zone_name != 'Dhaka';
SELECT * FROM data_table WHERE zone_name <> 'Dhaka';
SELECT * FROM data_table WHERE zone_code > 1;
SELECT * FROM data_table WHERE zone_code >= 3;
SELECT * FROM data_table WHERE zone_code ≥ 3;
SELECT * FROM data_table WHERE zone_name = 'Dhaka' OR zone_name = 'Khulna';
SELECT * FROM data_table WHERE zone_code < 3;
SELECT * FROM data_table WHERE zone_code <= 3;
SELECT * FROM data_table WHERE zone_code ≤ 3;
SELECT * FROM data_table WHERE zone_name NOT IN ('Dhaka', 'Khulna');
SELECT * FROM data_table WHERE zone_name IN ('Dhaka', 'Khulna');
SELECT * FROM data_table WHERE zone_name IS NULL;
SELECT * FROM data_table WHERE zone_name IS NOT NULL;