How can i optimize this query MYSQL

Question

Hello everyone i have this query but I don't know how to optimize this query. I will be thankful if someone can guide me here thanks in advance.

SELECT
    Jobs.id AS `Jobs__id`,
    Jobs.name AS `Jobs__name`,
    Jobs.media_id AS `Jobs__media_id`,
    Jobs.job_category_id AS `Jobs__job_category_id`,
    Jobs.job_type_id AS `Jobs__job_type_id`,
    Jobs.description AS `Jobs__description`,
    Jobs.detail AS `Jobs__detail`,
    Jobs.business_skill AS `Jobs__business_skill`,
    Jobs.knowledge AS `Jobs__knowledge`,
    Jobs.location AS `Jobs__location`,
    Jobs.activity AS `Jobs__activity`,
    Jobs.academic_degree_doctor AS `Jobs__academic_degree_doctor`,
    Jobs.academic_degree_master AS `Jobs__academic_degree_master`,
    Jobs.academic_degree_professional AS `Jobs__academic_degree_professional`,
    Jobs.academic_degree_bachelor AS `Jobs__academic_degree_bachelor`,
    Jobs.salary_statistic_group AS `Jobs__salary_statistic_group`,
    Jobs.salary_range_first_year AS `Jobs__salary_range_first_year`,
    Jobs.salary_range_average AS `Jobs__salary_range_average`,
    Jobs.salary_range_remarks AS `Jobs__salary_range_remarks`,
    Jobs.restriction AS `Jobs__restriction`,
    Jobs.estimated_total_workers AS `Jobs__estimated_total_workers`,
    Jobs.remarks AS `Jobs__remarks`,
    Jobs.url AS `Jobs__url`,
    Jobs.seo_description AS `Jobs__seo_description`,
    Jobs.seo_keywords AS `Jobs__seo_keywords`,
    Jobs.sort_order AS `Jobs__sort_order`,
    Jobs.publish_status AS `Jobs__publish_status`,
    Jobs.version AS `Jobs__version`,
    Jobs.created_by AS `Jobs__created_by`,
    Jobs.created AS `Jobs__created`,
    Jobs.modified AS `Jobs__modified`,
    Jobs.deleted AS `Jobs__deleted`,
    JobCategories.id AS `JobCategories__id`,
    JobCategories.name AS `JobCategories__name`,
    JobCategories.sort_order AS `JobCategories__sort_order`,
    JobCategories.created_by AS `JobCategories__created_by`,
    JobCategories.created AS `JobCategories__created`,
    JobCategories.modified AS `JobCategories__modified`,
    JobCategories.deleted AS `JobCategories__deleted`,
    JobTypes.id AS `JobTypes__id`,
    JobTypes.name AS `JobTypes__name`,
    JobTypes.job_category_id AS `JobTypes__job_category_id`,
    JobTypes.sort_order AS `JobTypes__sort_order`,
    JobTypes.created_by AS `JobTypes__created_by`,
    JobTypes.created AS `JobTypes__created`,
    JobTypes.modified AS `JobTypes__modified`,
    JobTypes.deleted AS `JobTypes__deleted`
FROM
    jobs Jobs
    LEFT JOIN jobs_personalities JobsPersonalities ON Jobs.id = (JobsPersonalities.job_id)
    LEFT JOIN personalities Personalities ON (Personalities.id = (JobsPersonalities.personality_id)
            AND(Personalities.deleted) IS NULL)
    LEFT JOIN jobs_practical_skills JobsPracticalSkills ON Jobs.id = (JobsPracticalSkills.job_id)
    LEFT JOIN practical_skills PracticalSkills ON (PracticalSkills.id = (JobsPracticalSkills.practical_skill_id)
            AND(PracticalSkills.deleted) IS NULL)
    LEFT JOIN jobs_basic_abilities JobsBasicAbilities ON Jobs.id = (JobsBasicAbilities.job_id)
    LEFT JOIN basic_abilities BasicAbilities ON (BasicAbilities.id = (JobsBasicAbilities.basic_ability_id)
            AND(BasicAbilities.deleted) IS NULL)
    LEFT JOIN jobs_tools JobsTools ON Jobs.id = (JobsTools.job_id)
    LEFT JOIN affiliates Tools ON (Tools.type = 1
            AND Tools.id = (JobsTools.affiliate_id)
            AND(Tools.deleted) IS NULL)
    LEFT JOIN jobs_career_paths JobsCareerPaths Page 3 / 4 ON Jobs.id = (JobsCareerPaths.job_id)
    LEFT JOIN affiliates CareerPaths ON (CareerPaths.type = 3
            AND CareerPaths.id = (JobsCareerPaths.affiliate_id)
            AND(CareerPaths.deleted) IS NULL)
    LEFT JOIN jobs_rec_qualifications JobsRecQualifications ON Jobs.id = (JobsRecQualifications.job_id)
    LEFT JOIN affiliates RecQualifications ON (RecQualifications.type = 2
            AND RecQualifications.id = (JobsRecQualifications.affiliate_id)
            AND(RecQualifications.deleted) IS NULL)
    LEFT JOIN jobs_req_qualifications JobsReqQualifications ON Jobs.id = (JobsReqQualifications.job_id)
    LEFT JOIN affiliates ReqQualifications ON (ReqQualifications.type = 2
            AND ReqQualifications.id = (JobsReqQualifications.affiliate_id)
            AND(ReqQualifications.deleted) IS NULL)
        INNER JOIN job_categories JobCategories ON (JobCategories.id = (Jobs.job_category_id)
                AND(JobCategories.deleted) IS NULL)
            INNER JOIN job_types JobTypes ON (JobTypes.id = (Jobs.job_type_id)
                    AND(JobTypes.deleted) IS NULL)
        WHERE ((JobCategories.name LIKE '%キャビンアテンダント%'
                OR JobTypes.name LIKE '%キャビンアテンダント%'
                OR Jobs.name LIKE '%キャビンアテンダント%'
                OR Jobs.description LIKE '%キャビンアテンダント%'
                OR Jobs.detail LIKE '%キャビンアテンダント%'
                OR Jobs.business_skill LIKE '%キャビンアテンダント%'
                OR Jobs.knowledge LIKE '%キャビンアテンダント%'
                OR Jobs.location LIKE '%キャビンアテンダント%'
                OR Jobs.activity LIKE '%キャビンアテンダント%'
                OR Jobs.salary_statistic_group LIKE '%キャビンアテンダント%'
                OR Jobs.salary_range_remarks LIKE '%キャビンアテンダント%'
                OR Jobs.restriction LIKE '%キャビンアテンダント%'
                OR Jobs.remarks LIKE '%キャビンアテンダント%'
                OR Personalities.name LIKE '%キャビンアテンダント%'
                OR PracticalSkills.name LIKE '%キャビンアテンダント%'
                OR BasicAbilities.name LIKE '%キャビンアテンダント%'
                OR Tools.name LIKE '%キャビンアテンダント%'
                OR CareerPaths.name LIKE '%キャビンアテンダント%'
                OR RecQualifications.name LIKE '%キャビンアテンダント%'
                OR ReqQualifications.name LIKE '%キャビンアテンダント%')
            AND publish_status = 1
            AND(Jobs.deleted) IS NULL)
    GROUP BY
        Jobs.id
    ORDER BY
        Jobs.sort_order DESC,
        Jobs.id DESC
    LIMIT 50 OFFSET 0

I know it's a long query but I have to optimize this no other options so need pro's guide thank you

Answer 1

Inefficient pattern

                 OR  Jobs.restriction   LIKE '%キャビンアテンダント%'
                 OR  Jobs.remarks       LIKE '%キャビンアテンダント%'
                 OR  Personalities.name LIKE '%キャビンアテンダント%'

This is a common, but very inefficient, pattern.

• OR prevents use of indexes
• Leading wildcard in LIKE prevents use of an index
• WHERE clause touching multiple table hurts.

Possible workaround

I do see pattern that can possibly be turned into an optimization. You seem to be checking a user-provided string against lots of columns. If, instead of using LIKE , you could use FULLTEXT , then there is a much faster solution. (Sorry, I don't know if Japanese can be used with FULLTEXT ; you would possibly need MySQL 8.0, which has a lot of UTF-8 improvements.)

Here's the technique:

1. Collect the data from all those search columns (restriction, remarks, name, etc) into a single column, perhaps into a new table.
2. Apply FULLTEXT to that column.
3. Search only in that column; get the matching id to then JOIN to all the other tables.

Fallback

Even if FULLTEXT does not work well with Asian languages, a single string to apply LIKE to would help.

Syntax error?

 LEFT JOIN jobs_career_paths JobsCareerPaths Page 3 / 4 ON Jobs.id = (JobsCareerPaths.job_id)

looks like a syntax error.

Composite index needed

    LEFT JOIN  affiliates CareerPaths
          ON (CareerPaths.type = 3
         AND  CareerPaths.id = (JobsCareerPaths.affiliate_id)
         AND (CareerPaths.deleted) IS NULL

CareerPaths needs this composite index:

INDEX(type, id, deleted)

with the columns in any order. 3 separate indexes is not as good. (Also check the other JOINs .)