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CREATE TABLE tabB1(
NUMID NUMERIC(5));
INSERT INTO tabB1(NUMID) VALUES (12),(14),(10),(11)
CREATE TABLE tabB2 (NUMID NUMERIC(5));
INSERT INTO tabB2(NUMID) VALUES (13),(11),(15),(12)
SELECT * FROM tabB1 inner join tabB2 on tabB1.NUMID=tabB2.NUMID;