使用PL/SQL删除百万条记录的大表

$ cat data_del.sql 

set serveroutput on
show serveroutput
DECLARE 
V_LOGNUM NUMBER;
V_NEEDARC NUMBER;
BEGIN 
SELECT count(1) INTO V_LOGNUM FROM V$LOG; 
LOOP 
LOOP 
SELECT count(1) INTO V_NEEDARC FROM V$ARCHIVE; 
IF V_NEEDARC < V_LOGNUM - 1 THEN 
 EXIT; 
ELSE 
 DBMS_LOCK.SLEEP(60); 
END IF; 
END LOOP; 
 
DELETE FROM T_USER.T_TABLE_NAME WHERE mobile=‘13800138000‘ AND rownum < 100; 
IF SQL%ROWCOUNT = 0 THEN 
 EXIT; 
END IF; 
 COMMIT; 
END LOOP; 
END;
/

 

2.编写调用脚本：

 

$vim clear_dirt_data.sh

source ~/.bash_profile

sqlplus -s mytest/passwd@mydb <<EOF

@data_del.sql;

exit;

EOF