什么是为下面的查询创建索引的最佳方法

Question

I have this query:

select * from `metro_stations`
where `is_active` = 1
  and (`title` like '%search%' or `title_en` like '%search%')

How to create effective indexes if is_active is TINYINT field and titles are VARCHAR(255) ?

And what about this query:

select * from `metro_stations`
where `is_active` = 1
 and (`title` like '%search%' or
      `title_en` like '%search%' or
      `description` like '%search%')

if description field is text?

Answer 1

use full text index for each column. If use in query "or" use seperately fts index, if use "and" mix fts index (in one index use several column) Full Text Index

Answer 2

FULLTEXT(title, title_en)

WHERE is_active = 1
  AND MATCH(title, title_en) AGAINST ("+search" IN BOOLEAN MODE)

(This should work for either InnoDB (5.6+) or MyISAM.)

Keep in mind the limitations of "word length" and "stop words" in FULLTEXT.