CREATE TABLE numeros (
num INT
);
INSERT INTO numeros (num) VALUES (1);
INSERT INTO numeros (num) VALUES (2);
INSERT INTO numeros (num) VALUES (3);
INSERT INTO numeros (num) VALUES (4);
CREATE TABLE pares (
num INT
);
INSERT INTO pares (num) VALUES (2);
INSERT INTO pares (num) VALUES (4);
INSERT INTO pares (num) VALUES (6);
INSERT INTO pares (num) VALUES (8);
SELECT * FROM numeros WHERE num IN (SELECT num FROM pares);
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