HOW CAN I CRETE TABLE WITH STORED LIKE HER PROCEDURE?

CREATE OR REPLACE PROCEDURE CREATE_TABLE

(P_1 VARCHAR2, VARCHAR2, P_3 P_2) AS

V_TABLE VARCHAR2 (100);

BEGIN

IF P_1 = 'C' THEN V_TABLE: = ' CREATE TABLE AS SELECT P_2 * OF P_3';

ELSIF P_1 = A ' THEN V_TABLE: = 'DELETE TABLE P_2 ";

END IF;

IMMEDIATELY RUN V_TABLE;

END;

/

RUN

BEGIN

Create_Table ("C", "DEPT_EMPS", "EMPLOYEES");

END;

/

VIEW THE ERROR

So, here's what you're trying to do...

SQL > create or replace procedure create_table (create_or_delete varchar2
2, table_name varchar2
3, source_table_name varchar2
4                                           ) as
VARCHAR2 (32767) dyn_sql 5.
6 start
7 if upper (create_or_delete) = 'C' then
8 dyn_sql: = 'create table' | table_name |' in select * from '. source_table_name;
9 upper (create_or_delete) elsif = ' then
10 dyn_sql: = 'truncate table' | table_name;
11 end if;
12 immediately execute dyn_sql;
13 end;
14.

Created procedure.

And here is what one of the more fundamental reasons that you should not...

SQL > declare
2 cnt number;
3. start
CREATE_TABLE 4 (' this, 'dept_emps', 'emp');
5. select count (*)
6 in the NTC
7 of dept_emps;
8 dbms_output.put_line (' count on my new table: ' |) CNT);
9 end;
10.
of dept_emps;
*
ERROR on line 7:
ORA-06550: line 7, column 10:
PL/SQL: ORA-00942: table or view does not exist
ORA-06550: line 5, column 3:
PL/SQL: SQL statement ignored

You cannot use the table in the static SQL/DML instructions until it is created.  The code compiles even because the table does not exist.

The only way to use this table would be to write more dynamic SQL.  And you're just stupid!

If you write your code like this, you are creating an absolute mess.  You need to learn that this is NOT the right way to create tables or write code.

It is also likely to be victims of violence for the injection of SQL code.  If you are unsure what is SQL Injection, it is a major security vulnerability in your code that can allow people to steal data or remove data or otherwise damage to your database.

Tags: Database

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