Dapatkan kembali hasil yang sama ketika mencoba menemukan data yang berbeda

Masalah Anda adalah kurangnya tanda kurung:Dalam SQL AND diutamakan daripada OR , jadi Anda perlu memberi tanda kurung di sekitar ekspresi Anda sebelumnya:

SELECT * FROM dim_date
WHERE ( -- added bracket
 EXTRACT (MONTH FROM date_cal) BETWEEN 3 AND 5
 OR (EXTRACT (MONTH FROM date_cal) = 2 AND EXTRACT (DAY FROM date_cal) >= 15)
 OR (EXTRACT (MONTH FROM date_cal) = 6 AND EXTRACT (DAY FROM date_cal) <= 21)
 ) -- added bracket
AND EXTRACT (YEAR FROM date_cal) BETWEEN 2010 AND 2012

Tanpa tanda kurung, Anda mendapatkan A or B or (C and D) , tetapi Anda ingin (A or B or C) and D