Mysql 搜索不区分大小写

Question

我在多个表中搜索不同值时遇到问题。当我搜索“paul”时，我什么也没得到，但如果我搜索“Paul”，我会得到名为 Paul 的订单的相应人员。

$get_orders = mysql_query("
SELECT
  co.id, co.final_id, co.shop_id, co.customer_id, co.payment_type, co.payment_currency, co.billing_email, co.billing_first_name, co.billing_last_name, co.delivery_first_name, co.delivery_last_name, UNIX_TIMESTAMP(co.order_created) AS order_created, c.email, s.site_name, 
MATCH(co.final_id, co.billing_first_name, co.billing_last_name, co.delivery_first_name, co.delivery_last_name, co.order_created) 
AGAINST ('$match_against' IN BOOLEAN MODE) AS score 
FROM customer_orders AS co 
LEFT JOIN customers AS c ON c.id = co.customer_id 
LEFT JOIN shops AS s ON s.id = co.shop_id WHERE co.status = '{$os}' 
ORDER BY score DESC 
LIMIT $offset,$views_page") or die(mysql_error());

我已经到处寻找这个问题的解决方案。我尝试使用 UPPER，将数据库排序规则从 utf8_general_ci 更改为 utf8_bin (二进制)，但我的问题仍然没有解决。

感谢所有建议..

问候

Answer 1

来自mysql手册:

The default character set and collation are latin1 and latin1_swedish_ci, so nonbinary string comparisons are case insensitive by default. This means that if you search with col_name LIKE 'a%', you get all column values that start with A or a. To make this search case sensitive, make sure that one of the operands has a case sensitive or binary collation. For example, if you are comparing a column and a string that both have the latin1 character set, you can use the COLLATE operator to cause either operand to have the latin1_general_cs or latin1_bin collation:

参见:mysql case sensitivity