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question random update

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czm 2021-01-06 22:05:51 +08:00
parent 1a3ecaf9e0
commit 487e184a9c
1 changed files with 17 additions and 24 deletions
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41
source/xzs/src/main/resources/mapper/QuestionMapper.xml
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@ -234,38 +234,34 @@
<select id="selectQuestionsByQuestionsNumber"
resultMap="BaseResultMap">
<foreach collection="eachList" item="each" separator="union">
(SELECT
q.skill_id,
q.industry_id,
i. NAME AS industry_name,
s. NAME AS skill_name,
t.content,
q.difficult,
q.question_type
FROM
t_question q
JOIN (
(
SELECT
r1.id
q.skill_id,
q.industry_id,
i. NAME AS industry_name,
s. NAME AS skill_name,
t.content,
q.difficult,
q.question_type
FROM
t_question AS r1
t_question AS q
JOIN (
SELECT
(
RAND() * (
SELECT
MAX(id)-#{each.eachNumber}
MAX(id)
FROM
t_question
)
) AS row_id
) AS r2
JOIN t_industry i ON i.id = r1.industry_id
JOIN t_skill s ON s.id = r1.skill_id
JOIN t_text_content t ON t.id = r1.info_text_content_id
JOIN t_industry i ON i.id = q.industry_id
JOIN t_skill s ON s.id = q.skill_id
JOIN t_text_content t ON t.id = q.info_text_content_id
<where>
r1.deleted=0 AND
r1.id >= r2.row_id
q.deleted=0 AND
q.id >= r2.row_id
<if test="each.difficult != null">
and q.difficult = #{each.difficult}
</if>
@ -277,12 +273,9 @@
</if>
</where>
ORDER BY
r1.id ASC
q.id ASC
LIMIT #{each.eachNumber}
) AS rows ON (rows.id = q.id)
JOIN t_industry i ON i.id = q.industry_id
JOIN t_skill s ON s.id = q.skill_id
JOIN t_text_content t ON t.id = q.info_text_content_id)
)
</foreach>
</select>