Oracle数据库批量删除数据经验
作者:互联网
由于大批量删除数据,必须考虑其删除数据需要的资源最少,因此可按照如下的方式删除。
DECLARE ln_count NUMBER(10); ln_rownum NUMBER(10); BEGIN LOOP FOR cur IN (SELECT t.rowid FROM os_mail_fs_send_detail t WHERE mail_title = '邮箱攻略' AND provcode = 16 AND rownum <= 10000) LOOP ln_count := ln_count + 1; DELETE os_mail_fs_send_detail WHERE ROWID = cur.rowid; IF ln_count > 10000 THEN ln_count := 1; COMMIT; END IF; END LOOP; SELECT COUNT(1) INTO ln_rownum FROM os_mail_fs_send_detail t WHERE mail_title = '邮箱攻略' AND provcode = 16 AND rownum <= 1; IF ln_rownum <= 0 THEN EXIT; END IF; END LOOP; END;
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标签:删除,批量,ln,数据库,NUMBER,Oracle,mail,rownum,SELECT 来源: https://www.cnblogs.com/susan8866/p/15670690.html