SQL JOINs | INNER vs LEFT vs RIGHT vs FULL OUTER | Clearly Explained | Beginners Start Here!

MASTER SQL JOINS IN ONE VIDEO | INNER vs LEFT vs RIGHT vs FULL vs CROSS | Realtime Examples

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Один % убил мой индекс — поиск завис на 8 секунд 🔥 LIKE '%foo%' — это ловушка: процент в начале выключает индекс. На миллионе строк — 5 мс против 8 сек. #sql #postgres #postgresql #backend #python #django #программирование #разработка #databases #performance #sqlacademy