优化多个OR查询

Question

我有一个数据库表，我需要验证用户是否输入了相同或部分相同的信息。

下面是我在想什么

的DB布局

rec_id (pk), user_id, 
name, phone, address_1, address_2, zip, 
company, co_phone, co_address_1, co_address_2, co_zip, 
billing, bi_phone, bi_address_1, bi_address_2, bi_zip 

查询

SELECT rec_id 
FROM tbl_name 
WHERE user_id = '123456789' 
OR '1112223333' IN (phone, co_phone, bi_phone) 
OR 'John Doe' IN (name, business, billing) 
OR '12345' IN (zip, co_zip, bi_zip) 
OR '123 main street' IN (address_1, co_address_1, bi_address_1) 
OR 'po box 123' IN (address_2, co_address_2, bi_address_2) 

如果有任何数据匹配的（是的将是误报）我需要旧的rec_id。

想知道是否有更好的方法来做到这一点？

感谢

Answer 1

对于此查询表现良好，你将需要为每个要测试的列单独的索引。所有列上的组合索引对OR条件完全没有帮助（如果您有AND，这将有所帮助）。

但是我会想象你的查询导致全表扫描，无论你添加了哪些索引。您可能需要使用工会代替或查看尝试，如果有差别：

SELECT rec_id FROM tbl_name WHERE tax_id = '123456789' 
UNION 
SELECT rec_id FROM tbl_name WHERE phone = '1112223333' 
UNION 
SELECT rec_id FROM tbl_name WHERE co_phone = '1112223333' 
UNION 
SELECT rec_id FROM tbl_name WHERE bi_phone = '1112223333' 
UNION 
SELECT rec_id FROM tbl_name WHERE name = 'John Doe' 
UNION 
SELECT rec_id FROM tbl_name WHERE business = 'John Doe' 
UNION 
SELECT rec_id FROM tbl_name WHERE billing = 'John Doe' 
UNION 
-- etc... 

重写它像这样的想法是，现在每个子查询就可以使用索引（假设，当然，你已经添加了必要的索引）。