PL/SQL帮助检查特定表中的特定值

Question

我有查询。我有1列user_auto与234值。 我想找到哪个表正在使用此列和具体的值。

我已经完成了多少个表正在使用此列。

SELECT t.name AS table_name 
FROM sys.tables AS t 
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID 
WHERE c.name LIKE '%user_auto%' 
ORDER BY table_name; 

现在我想要这个表与user_auto = 234有改变的价值。 表示User_auto的价值是234.想要关于此用户的所有详细信息？

Answer 1

你想要这样的东西吗？

SQL> desc foo1 
Name          Null? Type 
----------------------------------------- -------- ---------------------------- 
USER_AUTO           NUMBER 

SQL> desc foo2 
Name          Null? Type 
----------------------------------------- -------- ---------------------------- 
USER_AUTO           NUMBER 

SQL> select * From foo1; 

USER_AUTO 
---------- 
     123 
     1234 

SQL> select * From foo2; 

USER_AUTO 
---------- 
     234 

SQL> set serverout on 
SQL> declare 
    2 v_val varchar2(3) := '234'; 
    3 v_cnt pls_integer; 
    4 begin 
    5 for r_tab in (select table_name, column_name 
    6     from all_tab_columns 
    7     where column_name = 'USER_AUTO' 
    8     order by 1) 
    9 loop 
10  dbms_output.put_line('Found table ' || r_tab.table_name || ' with column '||r_tab.column_name); 
11  execute immediate 'begin select count(*) into :b0 from ' 
12      || r_tab.table_name 
13      || ' where rownum = 1 and ' || r_tab.column_name || ' = :b1;' 
14      || 'end;' using out v_cnt, v_val; 
15  if (v_cnt = 1) 
16  then 
17  dbms_output.put_line(chr(9)||'row found for ' || v_val); 
18  else 
19  dbms_output.put_line(chr(9)||'no row found for ' || v_val); 
20  end if; 
21 end loop; 
22 end; 
23/
Found table FOO1 with column USER_AUTO 
     no row found for 234 
Found table FOO2 with column USER_AUTO 
     row found for 234 

PL/SQL procedure successfully completed.