有人知道为什么第一个查询可以工作,而第二个不能吗?第一个查询(有效): MATCH(username) AGAINST ('ergergergergergerg' IN BOOLEAN MODE) AS _scoreFROM (ci_users) HAVING _score > '0';SELECT COUNT(id),
MATCH(username) AGAINST('ergergergergergerg
我已经找到了= vs用于单个值(链接和链接)的帖子,但实际上我要求的是多个值。它可能表现得更好:SELECT * FROM tbl WHERE id = 50 OR id = 51 OR id = 52
SELECT * FROM tbl WHERE id IN (50, 51, 52)
SELECT * FROM tbl WHERE id >= 50 AND id <= 52
注意:很明显,id是主索引的。