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什麼是使用這種語法的好處:WITH語句VS子查詢
WITH
cte1 AS (SELECT a, b FROM table1),
cte2 AS (SELECT c, d FROM table2)
SELECT b, d FROM cte1 JOIN cte2
WHERE cte1.a = cte2.c;
代替:
SELECT b, d
FROM (SELECT a, b FROM table1) AS cte1
JOIN (SELECT c, d FROM table2) AS cte2
WHERE cte1.a = cte2.c;
我理解,這是新的MySQL的8?
WITH AS ..可在子查詢不能重用的情況下重用。 –