Greetings! I am getting the wrong output, and I don't know how to get it to work. Please take a look at the following (Pardon the lengthy data): create table t0 (n INTEGER PRIMARY KEY, a, b, c, d, e, idate); insert into t0 (a, b, c, d, e, idate) values ('p001', 1, 2019, 'n', 4, '2019-02-11'); insert into t0 (a, b, c, d, e, idate) values ('p002', 2, 2019, 'n', 4, '2019-02-11'); insert into t0 (a, b, c, d, e, idate) values ('p003', 3, 2019, 'n', 4, '2019-02-11'); insert into t0 (a, b, c, d, e, idate) values ('p004', 4, 2019, 'y', 4, '2019-02-11'); insert into t0 (a, b, c, d, e, idate) values ('p005', 5, 2019, 'y', 4, '2019-02-11'); insert into t0 (a, b, c, d, e, idate) values ('p001', 10, 2020, 'n', 4, '2019-02-12'); insert into t0 (a, b, c, d, e, idate) values ('p002', 2, 2019, 'n', 4, '2019-02-12'); insert into t0 (a, b, c, d, e, idate) values ('p003', 3, 2019, 'y', 4, '2019-02-12'); insert into t0 (a, b, c, d, e, idate) values ('p004', 4, 2019, 'y', 4, '2019-02-12'); insert into t0 (a, b, c, d, e, idate) values ('p005', 5, 2019, 'y', 4, '2019-02-12'); insert into t0 (a, b, c, d, e, idate) values ('p001', 10, 2020, 'n', 4, '2019-02-13'); insert into t0 (a, b, c, d, e, idate) values ('p002', 2, 2019, 'n', 4, '2019-02-13'); insert into t0 (a, b, c, d, e, idate) values ('p003', 3, 2020, 'y', 4, '2019-02-13'); insert into t0 (a, b, c, d, e, idate) values ('p004', 5, 2019, 'n', 4, '2019-02-13'); insert into t0 (a, b, c, d, e, idate) values ('p005', 5, 2020, 'y', 8, '2019-02-13');
create table t1 (n INTEGER PRIMARY KEY, f, g, h, i, j, idate); insert into t1 (f, g, h, i, j, idate) values ('p001', 1, 4, 'n', 4, '2019-02-11'); insert into t1 (f, g, h, i, j, idate) values ('p002', 2, 3, 'n', 4, '2019-02-11'); insert into t1 (f, g, h, i, j, idate) values ('p003', 3, 2, 'n', 4, '2019-02-11'); insert into t1 (f, g, h, i, j, idate) values ('p004', 4, 5, 'y', 4, '2019-02-11'); insert into t1 (f, g, h, i, j, idate) values ('p005', 5, 3, 'y', 4, '2019-02-11'); insert into t1 (f, g, h, i, j, idate) values ('p001', 10, 2, 'n', 4, '2019-02-12'); insert into t1 (f, g, h, i, j, idate) values ('p002', 2, 6, 'n', 4, '2019-02-12'); insert into t1 (f, g, h, i, j, idate) values ('p003', 3, 7, 'y', 4, '2019-02-12'); insert into t1 (f, g, h, i, j, idate) values ('p004', 4, 1, 'y', 4, '2019-02-12'); insert into t1 (f, g, h, i, j, idate) values ('p005', 5, 2, 'y', 4, '2019-02-12'); insert into t1 (f, g, h, i, j, idate) values ('p001', 10, 1, 'n', 4, '2019-02-13'); insert into t1 (f, g, h, i, j, idate) values ('p002', 2, 8, 'n', 4, '2019-02-13'); insert into t1 (f, g, h, i, j, idate) values ('p003', 3, 9, 'y', 4, '2019-02-13'); insert into t1 (f, g, h, i, j, idate) values ('p004', 5, 3, 'n', 4, '2019-02-13'); insert into t1 (f, g, h, i, j, idate) values ('p005', 5, 3, 'y', 8, '2019-02-13'); create table t2 (pid, WYear); insert into t2 values ('p001', 2019); insert into t2 values ('p003', 2019); insert into t2 values ('p004', 2019); insert into t2 values ('p002', 2020); insert into t2 values ('p003', 2020); insert into t2 values ('p005', 2020); When I run this SELECT, SELECT a.a, a.c, a.e, b.g, b.h, b.i, ( CASE ( SELECT WYear FROM t2 WHERE pid = a.a ) WHEN c.WYear = 2020 THEN “YES” ELSE “NO” END ) AS DIGITAL FROM t0 as a, t1 as b, t2 as c WHERE a.a = b.f and a.a = c.pid AND a.c = 2020 AND a.idate = (SELECT MAX(idate) from t0 where a = a.a) AND b.idate = (SELECT MAX(idate) from t1 where f = a.a) GROUP BY a.a ; I get, p001|2020|4|10|1|n|NO p003|2020|4|3|9|y|NO p005|2020|8|5|3|y|NO I expected this, p001|2020|4|10|1|n|NO p003|2020|4|3|9|y|YES p005|2020|8|5|3|y|YES I've tried a few changes, but nothing seems to work. Thoughts please? thanks. josé _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users