mysql實現隨機獲取幾條數據的方法

sql語句有幾種寫法sql 1：SELECT * FROM tablename ORDER BY RAND() LIMIT 想要獲取的數據條數；spa 2：SELECT *FROM `table` WHERE id >= (SELECT FLOOR( MAX(id) * RAND()) FROM `table` ) ORDER BY id LIMIT 想要獲取的數據條數;table 3：SELEC

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