哪些操作應該在MySQL中執行得更快?假設我有999個值改變:多個UPDATE或DELETE + INSERT在MySQL中?
DELETE FROM table WHERE id IN(100, ..., 999);
INSERT INTO example VALUES (100, 'Peter'), (...), (999, 'Sam');
OR
UPDATE table_name SET name='Peter'
WHERE person_id=100; ...; UPDATE table_name SET name='Sam' WHERE person_id=999;
什麼['REPLACE'(http://dev.mysql.com/doc/refman/5.5/en/replace.html)? – Carsten 2013-03-22 12:22:45