mysql - MySQL - 优化 OR 语句

Question

我想使用该OR子句搜索 3 列。我知道，我只是遗漏了一些东西，但我不断收到 mysql 错误。

这是我到目前为止所拥有的：

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 OR 错了。有人能帮我修一下吗

Answer 1

使用 paranethesis 对您的ORstaements 进行分组：

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

Answer 2

您缺少两个括号：

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