Comparison Operators

Boolean operator for comparing against one or multiple expressions.

Equality (=)

SELECT last_name l FROM "test_emp" WHERE emp_no = 10000 LIMIT 5;

Null safe Equality (<=>)

SELECT 'elastic' <=> null AS "equals";
    equals
---------------
false

SELECT null <=> null AS "equals";
    equals
---------------
true

Inequality (<> or !=)

SELECT last_name l FROM "test_emp" WHERE emp_no <> 10000 ORDER BY emp_no LIMIT 5;

Comparison (<, <=, >, >=)

SELECT last_name l FROM "test_emp" WHERE emp_no < 10003 ORDER BY emp_no LIMIT 5;

BETWEEN

SELECT last_name l FROM "test_emp" WHERE emp_no BETWEEN 9990 AND 10003 ORDER BY emp_no;

IS NULL/IS NOT NULL

SELECT last_name l FROM "test_emp" WHERE emp_no IS NOT NULL AND gender IS NULL;

IN (<value1>, <value2>, ...)

SELECT last_name l FROM "test_emp" WHERE emp_no IN (10000, 10001, 10002, 999) ORDER BY emp_no LIMIT 5;