MySql多个关键字like查询结果按照匹配最多排序

MySql多个关键字like查询结果按照匹配最多排序：

  SELECT * FROM table WHERE  `title` LIKE '%关键字1%' OR `title` LIKE '%关键字2%' OR `title` LIKE '%关键字3%' OR `title` LIKE '%关键字4%'  ORDER BY ((CASE WHEN `title` LIKE '%关键字1%' then 3 else 0 end)+(CASE WHEN `title` LIKE '%关键字2%' then 1 else 0 end)) DESC LIMIT 0, 4

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