Sorry to bother you with this simple request, but I can't seem to come up with a solution. Imagine these tables: create table t (n INTEGER PRIMARY KEY, a, b, c, d, e, idate); insert into t (a, b, c, d, e, idate) values ('p001', 'a', 1, 'n', 4, '2019-02-11'); insert into t (a, b, c, d, e, idate) values ('p002', 'a', 1, 'n', 4, '2019-02-11'); insert into t (a, b, c, d, e, idate) values ('p003', 'a', 2, 'n', 4, '2019-02-11'); insert into t (a, b, c, d, e, idate) values ('p004', 'a', 2, 'y', 4, '2019-02-11'); insert into t (a, b, c, d, e, idate) values ('p005', 'a', 3, 'y', 4, '2019-02-11'); insert into t (a, b, c, d, e, idate) values ('p001', 'a', 4, 'n', 4, '2019-02-12'); insert into t (a, b, c, d, e, idate) values ('p002', 'a', 5, 'n', 4, '2019-02-12'); insert into t (a, b, c, d, e, idate) values ('p003', 'a', 6, 'n', 4, '2019-02-12'); insert into t (a, b, c, d, e, idate) values ('p004', 'a', 7, 'y', 4, '2019-02-12'); insert into t (a, b, c, d, e, idate) values ('p005', 'a', 8, 'y', 4, '2019-02-12'); insert into t (a, b, c, d, e, idate) values ('p001', 'a', 3, 'n', 4, '2019-02-13'); <----- insert into t (a, b, c, d, e, idate) values ('p002', 'a', 4, 'n', 4, '2019-02-13'); insert into t (a, b, c, d, e, idate) values ('p003', 'a', 5, 'n', 4, '2019-02-13'); insert into t (a, b, c, d, e, idate) values ('p004', 'a', 6, 'y', 4, '2019-02-13'); insert into t (a, b, c, d, e, idate) values ('p005', 'a', 7, 'y', 4, '2019-02-13');
create table z (n INTEGER PRIMARY KEY, f, g, h, i, j, idate); insert into z (f, g, h, i, j, idate) values ('p001', 'b', 6, 'o', 4, '2019-02-15'); insert into z (f, g, h, i, j, idate) values ('p002', 'b', 6, 'o', 4, '2019-02-15'); insert into z (f, g, h, i, j, idate) values ('p003', 'b', 6, 'i', 4, '2019-02-15'); insert into z (f, g, h, i, j, idate) values ('p004', 'a', 9, 'i', 4, '2019-02-16'); insert into z (f, g, h, i, j, idate) values ('p005', 'a', 8, 'u', 4, '2019-02-16'); insert into z (f, g, h, i, j, idate) values ('p001', 'a', 8, 'u', 4, '2019-02-17'); insert into z (f, g, h, i, j, idate) values ('p002', 'a', 5, 'e', 4, '2019-02-17'); insert into z (f, g, h, i, j, idate) values ('p003', 'a', 7, 'e', 4, '2019-02-17'); insert into z (f, g, h, i, j, idate) values ('p004', 'a', 7, 'b', 4, '2019-02-17'); insert into z (f, g, h, i, j, idate) values ('p005', 'a', 3, 'b', 4, '2019-02-18'); insert into z (f, g, h, i, j, idate) values ('p001', 'a', 3, 'a', 4, '2019-02-18'); <----- insert into z (f, g, h, i, j, idate) values ('p002', 'a', 3, 'a', 4, '2019-02-18'); insert into z (f, g, h, i, j, idate) values ('p003', 'a', 5, 'a', 4, '2019-02-18'); insert into z (f, g, h, i, j, idate) values ('p004', 'a', 6, 'o', 4, '2019-02-18'); insert into z (f, g, h, i, j, idate) values ('p005', 'a', 7, 'o', 4, '2019-02-18'); What I am trying to do is to SELECT the max(idate) items a, b and c from t and g, h, and i from z where t.a and z.f = 'p001' in both tables. So, what I want is, 'p001', 'a', 3, 'a', 3, 'a' from the combination of both <-----. So, here is what I have tried, select a.a, a.b, a.c, b.g, b.h, b.i from t as a join z as b on a.a = b.f where a.a = 'p001' group by a.a having ( a.idate = (select max(a.idate) from t as c where a.n = c.n) and b.idate = (select max(b.idate) from z as d where b.n = d.n) ); But, I get nothing. sqlite> select a.a, a.b, a.c, b.g, b.h, b.i from t as a join z as b on a.a = b.f ...> where a.a = 'p001' ...> group by a.a ...> having ...> ( a.idate = (select max(a.idate) from t as c where a.n = c.n) ...> and ...> b.idate = (select max(b.idate) from z as d where b.n = d.n) ...> ); sqlite> Any help would be greatly appreciated. Thanks. josé _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users