я ведь вполне могу сделать так:
[Tab1]:
SELECT id
FROM B
WHERE date = '01/01/2019';
[Tab2]:
SELECT *
FROM A
WHERE b_id EXISTS([Tab1]);
??
[Tab1]:
SELECT id as tab1_id
FROM B
WHERE date = '01/01/2019';
[Tab2]:
SELECT id as tab2_id,
*
FROM A
WHERE EXISTS(tab2_id, tab1_id);