MySQL-优化或语句

我想使用

或

子句搜索3列。我知道，我遗漏了一些简单的东西，但我一直收到一个mysql错误

以下是我目前掌握的情况：

SELECT customerid,companyname,firstname,lastname
FROM `tbl_customers` 
WHERE customeronoff = 1 
AND customerrecordtype = 'A' 
AND (companyname LIKE '$query%') OR (lastname LIKE '$query%') OR (firstname LIKE '$query%')   
ORDER BY lastname ASC

---

我一定是把手术室放错了。有人能帮我修理一下吗？请使用Paranthesis对您的

或
状态进行分组：

AND (
     (companyname LIKE '$query%') 
  OR (lastname LIKE '$query%') 
  OR (firstname LIKE '$query%')  
)

使用paranethesis对您的
或
状态进行分组：

AND (
     (companyname LIKE '$query%') 
  OR (lastname LIKE '$query%') 
  OR (firstname LIKE '$query%')  
)

缺少两个括号：

SELECT customerid,companyname,firstname,lastname
FROM `tbl_customers` 
WHERE customeronoff = 1 
AND customerrecordtype = 'A' 
AND **(**(companyname LIKE '$query%') OR (lastname LIKE '$query%') OR (firstname LIKE '$query%')**)**
ORDER BY lastname ASC

缺少两个括号：

SELECT customerid,companyname,firstname,lastname
FROM `tbl_customers` 
WHERE customeronoff = 1 
AND customerrecordtype = 'A' 
AND **(**(companyname LIKE '$query%') OR (lastname LIKE '$query%') OR (firstname LIKE '$query%')**)**
ORDER BY lastname ASC

你的错误是什么？你的错误是什么？