1 BEGIN
 2     FOR c IN ( SELECT COLUMN_NAME cn FROM all_tab_columns WHERE table_name = '表名' )
 3     loop
 4 BEGIN
 5     execute IMMEDIATE 'alter table 表名 rename column "' || c.cn || '" to ' || c.cn;
 6 EXCEPTION 
 7     WHEN others THEN
 8     dbms_output.put_line ( '表名' || '.' || c.cn || '已经存在' );
 9 
10 END;
11 
12 END loop;
13 END;
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