SELECT * from vat_subject sb
WHERE stage_id=1 and course=0
ORDER BY RAND() LIMIT 0,4
ORDER BY RAND(): stands for random
LIMIT 0,4: Query 4 pieces of data
Random query 4
Test result 1:
Test result 2:
MySQL randomly query 4 records
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Origin blog.csdn.net/m0_43413873/article/details/106501422
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