DROP TABLE IF EXISTS A; DROP TABLE IF EXISTS B; CREATE TABLE A(k UInt32, t UInt32, a UInt64) ENGINE = MergeTree() ORDER BY (k, t); INSERT INTO A(k,t,a) VALUES (1,101,1),(1,102,2),(1,103,3),(1,104,4),(1,105,5); CREATE TABLE B(k UInt32, t UInt32, b UInt64) ENGINE = MergeTree() ORDER BY (k, t); INSERT INTO B(k,t,b) VALUES (1,102,2), (1,104,4); SELECT A.k, A.t, A.a, B.b, B.t, B.k FROM A ASOF LEFT JOIN B USING(k,t) ORDER BY (A.k, A.t); DROP TABLE B; CREATE TABLE B(t UInt32, k UInt32, b UInt64) ENGINE = MergeTree() ORDER BY (k, t); INSERT INTO B(k,t,b) VALUES (1,102,2), (1,104,4); SELECT A.k, A.t, A.a, B.b, B.t, B.k FROM A ASOF LEFT JOIN B USING(k,t) ORDER BY (A.k, A.t); DROP TABLE B; CREATE TABLE B(k UInt32, b UInt64, t UInt32) ENGINE = MergeTree() ORDER BY (k, t); INSERT INTO B(k,t,b) VALUES (1,102,2), (1,104,4); SELECT A.k, A.t, A.a, B.b, B.t, B.k FROM A ASOF LEFT JOIN B USING(k,t) ORDER BY (A.k, A.t); DROP TABLE B; DROP TABLE A;