mysql - Sql 通配符，大写字母导致问题

Question

进行非常简单的通配符搜索：

"SELECT firstname, lastname, email, text FROM members WHERE firstname LIKE '%$word%' OR lastname LIKE '%$word%' OR email LIKE '%$word%' OR text LIKE '%$word%'"

如果我搜索“test”，它会找到“test”而不是“Test”，我该如何解决这个问题？奇怪的是，在另一个数据库中，它找到了“Test”和“test”这两个词，它们正在运行“latin1_swedish_ci”。

我认为“整理”语句会有所帮助，但我无法让它工作:(

Answer 1

"SELECT firstname, lastname, email, text FROM members WHERE UPPER(firstname) LIKE UPPER('%$word%') OR UPPER(lastname) LIKE UPPER('%$word%') OR UPPER(email) LIKE UPPER('%$word%') OR UPPER(text) LIKE UPPER('%$word%')"

尝试这样做它会在将每个文本转换为大写后进行搜索

Answer 2

"SELECT firstname, lastname, email, text 
FROM members 
WHERE upper(firstname) LIKE upper('%$word%') 
OR upper(lastname) LIKE upper('%$word%') 
OR upper(email) LIKE upper('%$word%') 
OR upper(text) LIKE upper('%$word%')"

"SELECT firstname, lastname, email, text 
FROM members 
WHERE lower(firstname) LIKE lower('%$word%') 
OR lower(lastname) LIKE lower('%$word%') 
OR lower(email) LIKE lower('%$word%') 
OR lower(text) LIKE lower('%$word%')"

这应该工作:)