Oracle 僞列、取前幾條記錄、日期判斷、觸發器等

從表中隨機取4條記錄： sql select * from (select * from 表 order by dbms_random.random) where rownum < 5 僞列2type： select * from ( select ai.activityId,ai.owner,ai.creatorName, ai.subject,ai.createDate,2type from

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