-- 查看表中列含有指定字符。
SQL> select * from demo1;


NAME                                   ID
------------------------------ ----------
????                                    4
andy                                    1
andy1                                   2
andy2                                   3
liudehua                                3
????                                    5


6 rows selected.


SQL> select * from demo2;


NAME                                   ID
------------------------------ ----------
andy                                    1
andy2                                   3
andy2                                   3
liudehua                                3


SQL> select * from demo3;


NAME                                   ID
------------------------------ ----------
andy                                    1
andy2                                   3
andy2                                   3
liudehua                                3


SQL> set serveroutput on






SQL>DECLARE
  v_sql VARCHAR2(4000);
  v_tb_column VARCHAR2(4000);
  v_cnt NUMBER(18,0);
  cursor cur is SELECT ‘SELECT ‘‘‘||‘"‘||t1.table_name||‘"."‘||t1.Column_Name||‘"‘||‘‘‘‘||‘ as col_name, NVL(COUNT(t."‘||t1.Column_Name||‘"),0) as cnt FROM "‘||
         t1.table_name||‘" t WHERE t."‘||t1.column_name||‘" like ‘‘%andy%‘‘‘ AS str
    FROM cols t1 left join user_col_comments t2
      on t1.Table_name=t2.Table_name and t1.Column_Name=t2.Column_Name
    left join user_tab_comments t3 
      on t1.Table_name=t3.Table_name 
   WHERE NOT EXISTS ( SELECT t4.Object_Name FROM User_objects t4
               WHERE t4.Object_Type=‘TABLE‘ 
                 AND t4.Temporary=‘Y‘ 
                 AND t4.Object_Name=t1.Table_Name )
     AND (t1.Data_Type=‘CHAR‘ or t1.Data_Type=‘VARCHAR2‘ or t1.Data_Type=‘VARCHAR‘)
   -- AND t1.table_name=‘RUN_STATS‘
   ORDER BY t1.Table_Name, t1.Column_ID;
 
BEGIN
  FOR i IN cur LOOP
    v_sql := i.str; -- 获取将要执行的SQL语句；
    EXECUTE IMMEDIATE v_sql INTO v_tb_COLUMN, v_cnt;
    IF v_cnt > 0 THEN
      dbms_output.put_line(‘table‘||substr(v_tb_column,1,instr(v_tb_column,‘.‘,1,1)-1)||‘ col‘||substr(v_tb_column,instr(v_tb_column,‘.‘,1,1)+1)||‘ has string"andy" ‘);
    END IF;
  END LOOP;
EXCEPTION WHEN OTHERS THEN
BEGIN
  dbms_output.put_line(v_sql);
  dbms_output.put_line(v_tb_column);
END;
END;
/






结果输出：
table"DEMO1" col"NAME" has string"andy"
table"DEMO2" col"NAME" has string"andy"
table"DEMO3" col"NAME" has string"andy"
table"TEAM" col"MENTOR" has string"andy"

PL/SQL procedure successfully completed.

参考：http://bbs.csdn.net/topics/350154546

查看哪些表的哪些列含有指定字符串（如‘andy’存在哪些表的哪些列中）