Anonymous block with Variable and SELECT

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  Hello

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  But the preferred method is to use the functions and procedures stored in memory and runs faster.

  For more details and information, please see:

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  Procedures and functions:

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  HTH
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• Error of closure with variable

  Dear all,
  
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  ------
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  SQL> ed
  Wrote file afiedt.buf
  
    1  declare
    2    l_cursor sys_refcursor;
    3    l_sql_stmt varchar2(100);
    4    l_dummy    varchar2(1);
    5  begin
    6    l_sql_stmt := 'select dummy from dual';
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    8    loop
    9      fetch l_cursor into l_dummy;
   10      exit when l_cursor%notfound;
   11      dbms_output.put_line( l_dummy );
   12    end loop;
   13    close l_cursor;
   14* end;
  SQL> /
  X
  
  PL/SQL procedure successfully completed.
  

  Justin

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• Unexpected result with select max (colmn) in anonymous block

  Hello
  
  The following query gives me 28 800 like sum (sal)

  SELECT SUM(salary)
  FROM employees 
      WHERE department_id =60
  O/P is :  28800

  But when I use the above query in anonymous block, it gives me 684400

  DECLARE
   v_sum_sal NUMBER;
   department_id employees.department_id%TYPE := 60;
  BEGIN
      dbms_output.put_line ('The department_id is'||department_id);
     SELECT SUM(salary)
        into v_sum_sal 
      FROM employees 
      WHERE department_id = department_id ;
     dbms_output.put_line ('The sum of sal is'||v_sum_sal);
  END;

  Exit instructions above gives me 684400 as output... But the grounds are 28800
  
  You can me why the output differs block anonymous reference please

  Hello

  What about prefixing all your PL/SQL variables so that they do not match a column_name :

  DECLARE
   v_sum_sal NUMBER;
   v_department_id employees.department_id%TYPE := 60;
  BEGIN
      dbms_output.put_line ('The department_id is'||v_department_id);
     SELECT SUM(salary)
        into v_sum_sal
      FROM employees
      WHERE department_id = v_department_id ;
     dbms_output.put_line ('The sum of sal is'||v_sum_sal);
  END;
  

  Because, with the first names, where clause was equivalent to:

  where 1=1
  

• Anonymous blocks that goes down and creates a table

  Version: 11.2.0.3

  I'm relatively new to PL/SQL.

  We have a table named CHK_CNFG_DTL.

  I want to create a backup table for CHK_CNFG_DTL who will be named as CHK_CNFG_DTL_BKP_ < timestamp > for example: CHK_CNFG_DTL_BKP_JULY_22_2013

  Creating this backup table must be automated, so I want to create an anonymous block that will first remove the existing backup table and then create a new backup of the original table.

  The code below works fine. But the first time when you run it, the loop will not iterate because there is no such table named % CHK_CNFG_DTL_BKP.

  declare

  v_stmt varchar2 (1000);

  date of T_DATE;

  Start

  for rec in

  (select * from user_tables where table_name like '% CHK_CNFG_DTL_BKP')

  loop

  Start

  run immediately "alter session set nls_date_format =" DD_MON_YYYY "';"

  v_stmt: = 'drop table' | Rec.table_name | "purge."

  dbms_output.put_line (v_stmt);   -Old backup drops table

  immediately run v_stmt;

  Select sysdate in double T_DATE;

  v_stmt: = "create table CHK_CNFG_DTL_BKP_ | TO_DATE (V_DATE): ' in select * from CHK_CNFG_DTL';

  dbms_output.put_line ('Bkp création table CHK_CNFG_DTL_BKP_' | to_date (v_date));

  dbms_output.put_line (v_stmt);

  immediately run v_stmt;  -Creates the new table of backup
  

  exception

  while others

  then

  dbms_output. Put_line (rec.table_name |'-'|) SQLERRM);

  end;

  end loop;

  end;

  /

  PL/SQL procedure successfully completed.

  -Backup table was not created.

  SQL > select table_name from user_Tables where table_name like '% CHK_CNFG_DTL ';

  TABLE-NAME

  ------------------------------

  CHK_CNFG_DTL

  Of course, this can fixed by creating a table as bleow before running the anonymous block

  SQL > create table CHK_CNFG_DTL_BKP_JULY_22_2013 (x varchar2 (37));

  Table created.

  and now the block will be executed with success as

  24 end;

  25.

  drop table CHK_CNFG_DTL_BKP_JULY_22_2013 purge

  Creating table Bkp CHK_CNFG_DTL_BKP_22_JUL_2013

  create the table CHK_CNFG_DTL_BKP_22_JUL_2013 select * from CHK_CNFG_DTL

  PL/SQL procedure successfully completed.

  But it goes to production. We cannot have a table like CHK_CNFG_DTL_BKP_JULY_22_2013 without an appropriate reason.

  How can I change the code above so that if even if there is no such like '% CHK_CNFG_DTL_BKP' table, he will create the backup table?

  Hello

  Why don't you press the create backup of the loop?

  declare

  v_stmt varchar2 (1000);

  date of T_DATE;

  Start

  for rec in

  (select * from user_tables where table_name like 'CHK_CNFG_DTL_BKP %')

  loop

  Start

  run immediately "alter session set nls_date_format =" DD_MON_YYYY "';"

  v_stmt: = 'drop table' | Rec.table_name | "purge."

  dbms_output.put_line (v_stmt);   -Old backup drops table

  immediately run v_stmt;

  exception

  while others

  then

  dbms_output. Put_line (rec.table_name |'-'|) SQLERRM);

  end;

  end loop;

  Select sysdate in double T_DATE;

  v_stmt: = "create table CHK_CNFG_DTL_BKP_ | TO_DATE (V_DATE): ' in select * from CHK_CNFG_DTL';

  dbms_output.put_line ('Bkp création table CHK_CNFG_DTL_BKP_' | to_date (v_date));

  dbms_output.put_line (v_stmt);

  immediately run v_stmt;  -Creates the new table of backup

  end;