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DROP TABLE IF EXISTS t1; DROP TABLE IF EXISTS t2; CREATE TABLE t1 (c1 INT, c2 CHAR(100)); INSERT INTO t1 VALUES (null,null); INSERT INTO t1 VALUES (1,''); INSERT INTO t1 VALUES (2,'abcde'); INSERT INTO t1 VALUES (100,'abcdefghij'); CREATE TABLE t2 (c1 INT, c2 VARCHAR(100)); INSERT INTO t2 VALUES (1,'abcde'); INSERT INTO t2 VALUES (2,'abcde'); SELECT * FROM t1 WHERE (c1,c2) = (SELECT c1, c2 FROM t2 WHERE c1=2); c1 c2 2 abcde SELECT * FROM t1 WHERE ROW(1,2) = (SELECT c1, c2 FROM t2 WHERE c1=2); c1 c2 SELECT * FROM t1 WHERE (c1,c2) = (2,'abcde'); c1 c2 2 abcde DROP TABLE t1; DROP TABLE t2; CREATE TABLE t1 (c1 INT, c2 VARCHAR(100)); INSERT INTO t1 VALUES (null,null); INSERT INTO t1 VALUES (1,''); INSERT INTO t1 VALUES (2,'abcde'); INSERT INTO t1 VALUES (100,'abcdefghij'); CREATE TABLE t2 (c1 INT, c2 VARCHAR(100)); INSERT INTO t2 VALUES (1,'abcde'); INSERT INTO t2 VALUES (2,'abcde'); SELECT * FROM t1 WHERE (c1,c2) = (SELECT c1, c2 FROM t2 WHERE c1=2); c1 c2 2 abcde SELECT * FROM t1 WHERE ROW(1,2) = (SELECT c1, c2 FROM t2 WHERE c1=2); c1 c2 SELECT * FROM t1 WHERE (c1,c2) = (2,'abcde'); c1 c2 2 abcde DROP TABLE t1; DROP TABLE t2; CREATE TABLE t1 (c1 INT, c2 BINARY(100)); INSERT INTO t1 VALUES (null,null); INSERT INTO t1 VALUES (1,''); INSERT INTO t1 VALUES (2,'abcde'); INSERT INTO t1 VALUES (100,'abcdefghij'); CREATE TABLE t2 (c1 INT, c2 VARCHAR(100)); INSERT INTO t2 VALUES (1,'abcde'); INSERT INTO t2 VALUES (2,'abcde'); SELECT * FROM t1 WHERE (c1,c2) = (SELECT c1, c2 FROM t2 WHERE c1=2); c1 c2 SELECT * FROM t1 WHERE ROW(1,2) = (SELECT c1, c2 FROM t2 WHERE c1=2); c1 c2 SELECT * FROM t1 WHERE (c1,c2) = (2,'abcde'); c1 c2 DROP TABLE t1; DROP TABLE t2; CREATE TABLE t1 (c1 INT, c2 VARBINARY(100)); INSERT INTO t1 VALUES (null,null); INSERT INTO t1 VALUES (1,''); INSERT INTO t1 VALUES (2,'abcde'); INSERT INTO t1 VALUES (100,'abcdefghij'); CREATE TABLE t2 (c1 INT, c2 VARCHAR(100)); INSERT INTO t2 VALUES (1,'abcde'); INSERT INTO t2 VALUES (2,'abcde'); SELECT * FROM t1 WHERE (c1,c2) = (SELECT c1, c2 FROM t2 WHERE c1=2); c1 c2 2 abcde SELECT * FROM t1 WHERE ROW(1,2) = (SELECT c1, c2 FROM t2 WHERE c1=2); c1 c2 SELECT * FROM t1 WHERE (c1,c2) = (2,'abcde'); c1 c2 2 abcde DROP TABLE t1; DROP TABLE t2;