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drop table if exists t1, t2; CREATE TABLE t1 ( a int PRIMARY KEY ) engine = ndb; INSERT INTO t1 VALUES (1); INSERT INTO t1 VALUES (2); INSERT INTO t1 VALUES (3); INSERT INTO t1 VALUES (4); INSERT INTO t1 VALUES (5); INSERT INTO t1 VALUES (6); select MAX(a) from t1; MAX(a) 6 select MAX(a) from t1; MAX(a) 6 select MAX(a) from t1; MAX(a) 6 select MAX(a) from t1; MAX(a) 6 select MIN(a) from t1; MIN(a) 1 select MIN(a) from t1; MIN(a) 1 select MIN(a) from t1; MIN(a) 1 select * from t1 order by a; a 1 2 3 4 5 6 select MIN(a) from t1; MIN(a) 1 select MAX(a) from t1; MAX(a) 6 select MAX(a) from t1; MAX(a) 6 select * from t1 order by a; a 1 2 3 4 5 6 drop table t1; CREATE TABLE t2 ( a int PRIMARY KEY, b int not null, c int not null, KEY(b), UNIQUE(c) ) engine = ndb; INSERT INTO t2 VALUES (1, 5, 1); INSERT INTO t2 VALUES (2, 2, 7); INSERT INTO t2 VALUES (3, 3, 3); INSERT INTO t2 VALUES (4, 4, 4); INSERT INTO t2 VALUES (5, 5, 5); INSERT INTO t2 VALUES (6, 6, 6); INSERT INTO t2 VALUES (7, 2, 10); INSERT INTO t2 VALUES (8, 10, 2); select MAX(a) from t2; MAX(a) 8 select MAX(b) from t2; MAX(b) 10 select MAX(c) from t2; MAX(c) 10 select MIN(a) from t2; MIN(a) 1 select MIN(b) from t2; MIN(b) 2 select MIN(c) from t2; MIN(c) 1 select * from t2 order by a; a b c 1 5 1 2 2 7 3 3 3 4 4 4 5 5 5 6 6 6 7 2 10 8 10 2 select MIN(b) from t2; MIN(b) 2 select MAX(a) from t2; MAX(a) 8 select MAX(c) from t2; MAX(c) 10 select * from t2 order by a; a b c 1 5 1 2 2 7 3 3 3 4 4 4 5 5 5 6 6 6 7 2 10 8 10 2 drop table t2;