用于匹配多个字符串之一的SQL查询

Question

我在表格中有以下数据:

+----------------------+----------------------------------------------------------+--------------+
| subscriber_fields_id | name                                                     | field_type   |
+----------------------+----------------------------------------------------------+--------------+
|                  143 | Peshawar/Islamabad/Lahore/Swat/Mardan/Karachi            | Job Location |
|                  146 | Karachi                                                  | Job Location |
|                  147 | Lahore and Karachi                                       | Job Location |
|                  149 | Karachi, Mirpur Khas, Sukkur, Layyah, Gilgit, Charsaddah | Job Location |
|                  152 | Islamabad or Lahore                                      | Job Location |
|                  155 | Islamabad                                                | Job Location |
|                  157 | 7 Districts of Sindh and Karachi                         | Job Location |
+----------------------+----------------------------------------------------------+--------------+

我的查询是:

select * from subscriberfields
where  name like '%Khairpur,Islamabad,Karachi%';

结果:

+----------------------+-----------------------------------------------+--------------+
| subscriber_fields_id | name                                          | field_type   |
+----------------------+-----------------------------------------------+--------------+
|                  143 | Peshawar/Islamabad/Lahore/Swat/Mardan/Karachi | Job Location |
|                  152 | Islamabad or Lahore                           | Job Location |
|                  155 | Islamabad                                     | Job Location |
+----------------------+-----------------------------------------------+--------------+

它应该返回名称包括伊斯兰堡,Khairpur或卡拉奇的所有行,但事实并非如此.

Answer 1

要获得正确的解决方案,请对数据库设计进行规范化,或者除此之外,请考虑全文搜索.

要快速解决当前问题,请使用正则表达式match(~)或三个简单LIKE表达式:

SELECT *
FROM   subscriberfields 
WHERE  name ~ '(Khairpur|Islamabad|Karachi)';

要么:

...
WHERE (name LIKE '%Khairpur%' OR
       name LIKE '%Islamabad%' OR
       name LIKE '%Karachi%')

或者使用~*或ILIKE不区分大小写的匹配.

由于另一个答案建议:永远不要使用SIMILAR TO:

• 使用SIMILAR TO进行正则表达式？
• 与PostgreSQL中的LIKE,SIMILAR TO或正则表达式匹配的模式

Answer 2

你可以使用这个：

select * from subscriberfields
where  name like any(array['%Khairpur%','%Islamabad%','%Karachi%']);

https://postgres.cz/wiki/PostgreSQL_SQL_Tricks#LIKE_to_list_of_patterns

Answer 3

在 WHERE 子句中使用 OR，例如，

select * from subscriberfields where name like '%Khairpur%' OR name like '%Islamabad%' OR name like '%Karachi%';

希望它有效。