Dynamic query using no PL/SQL. Is this Possible?

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• index of dynamic query uses

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  Hello

  We have following question

  Select s.* s bose_sites.registration_crm_serial_number

  R2 bose_sites.registration_crm_serial_number left on join

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  Hello

  You have one table here

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

  Schema name: SYS

  SQL ID: cf2875zz4q4nd

  SQL text: select s.* bose_sites.registration_crm_serial_number s

  R2 bose_sites.registration_crm_serial_number left on join

  s.serialnr = r2.shipserialnr

  where s.shipserialnr is null

  and (r2.serialnr = '052378332000138AE' or (s.serialnr =

  S.shipserialnr and "052378332000138AE" is null))

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

  then why don't you go for a simple query

  HTH

• Sort on dynamic query problem!

  Hello
  
  I have a dynamic query written in pl/sql, when I check "Sort" for each field in the report attribute, error message resurrected as "ORA-01785: ORDER BY item must include the number of an expression in the SELECT list.
  If I do not check sort, it works very well. In my applications, I need all the fields sorted by user, how do I solve this problem?
  
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  s_class varchar2 (1000);
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  Start
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  Maybe the internal column used when you clicked the sort is not indicated in the report. Try to use aliases when you build the query string, it might help apex internally to identify a column even if its order is changed to another user. After all, the order of the columns in the code is dynamic and I assume that even the number of displayed columns can vary that could sort on a column that is identified by a number not valid.

  How about somewhere, displaying the report query so that you know what is the exact query processing, it could give you the best information on the problem.

  If the problem persists, use a collection that is extracted these record using the same query string, then replace the report to view the collection and then set the sort column on. This way Summit could get confused about which columns are being sorted and it would just sort on a c001... C050 column as if it were a string (Yes problems with the number of sort columns when you do this).

• How to map Dynamic Query columns on variables of forms.

  Dear all,
  This is a correct code for executing a dynamic query and display data.
  In this program that I have defined variables ("BOLD" of police) later I binds these with the query (in the second code "BOLD").
  
  How I can map a column in the query, in which case I don't know that the surveyed fields type?
  
  
  
  GetData PROCEDURE IS
  EXEC_SQL connection_id. PORT;
  cursorID EXEC_SQL. CURSTYPE;
  sqlstr VARCHAR2 (1000);
  
  loc_ename VARCHAR2 (30);
  loc_eno NUMBER;
  loc_hiredate DATE;
  
  nIgn PLS_INTEGER;
  
  BEGIN
  connection_id: = EXEC_SQL. DEFAULT_CONNECTION;
  cursorID: = EXEC_SQL. OPEN_CURSOR (connection_id);
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  sqlstr: = "select ename, empno, hiredate from emp;
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  EXEC_SQL. DEFINE_COLUMN (connection_id, cursorID, 2, loc_eno);
  EXEC_SQL. DEFINE_COLUMN (connection_id, cursorID, 3, loc_hiredate);
  
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  -do execute_and_fetch after the analysis of the statement and calling bind_variable and
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  --
  
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  EXEC_SQL. COLUMN_VALUE (connection_id, cursorID, 1, loc_ename);
  EXEC_SQL. COLUMN_VALUE (connection_id, cursorID, 2, loc_eno);
  EXEC_SQL. COLUMN_VALUE (connection_id, cursorID, 3, loc_hiredate);
  
  MESSAGE(loc_ename||) e '|| loc_eno | » '|| loc_hiredate);
  
  END LOOP;
  END IF;
  END;

  If you want to use EXEC_SQL and a dynamic query with unknown data types, but the known table name,
  Then you can declare a rowtype variable
  for example;

   NOT TESTED ---A ROUGH IDEA
  m_emp_row employee_master%rowtype;
  m_col_cnt number := 0;
  So when you define collumn, create a procedure to find the column name and its width if it is varchar2 with respect to the column name .
     Find the column details from the user_tab_columns table ...
  ---------------------------------------------------------------------------------------------------------------------------------------------------
    while m_col_cnt < 3 loop
         m_col_cnt  := m_col_cnt +1;
         proc_find_col_name_width(p_qry ,p_col_no=>m_col_cnt , p_col_name,p_col_width);
  
        If p_col_name = 'EMPCODE' then
           EXEC_SQL.DEFINE_COLUMN(connection_id, cursorID, m_col_cnt , m_emp_row.empcode , p_col_width);
        elsif p_col_name ='EMPNAME' then
           EXEC_SQL.DEFINE_COLUMN(connection_id, cursorID, m_col_cnt , m_emp_row.empname , p_col_width);
         -----
          -------
         end if;
    end loop;
  
  ---------------------------------------------------------------------------------------------------------------------------------------------------
  --Your procedure will look like this
   procedure proc_find_col_name_width(p_qry  varchar2,p_col_no number, p_col_name out varchar2,p_col_width out number) is 
  
   m_col_name varchar2(30);
   Cursor c1 is
   Select  data_length
   from user_tab_columns
   where table_name = 'yr_tab_name'
   and column_name = m_col_name;
   m_lastpos number ;
   m_nxtpos number ;
   Begin
    m_lastpos := instr(p_qry,',',1,p_col_no-1);
    m_nxtpos := instr(p_qry,',',1,p_col_no);
    If m_lastpos = 0 then --- if only one col
       m_col_name := substr(p_qry,instr(upper(P_QRY),'SELECT') + 6, instr(upper(P_QRY),'FROM') -1);
    else
         If m_nxtpos = 0 then ---if last column
               m_nxtpos := instr(upper(P_QRY),'FROM') -1;
         end if;
  
      m_col_name := substr(p_qry,m_lastpos+1,m_nxtpos);
    End if;
    m_col_name := ltrim(rtrim(m_col_name));
    open c1;
    fetch c1 into p_col_width;
    close c1;
    p_col_name := m_col_name;
  END;
  

  same thing you must apply when retrieving values using exec_sql.column_value
  concerning
  Dora

  Published by: Dora on December 7, 2009 12:20

  Published by: Dora on December 7, 2009 12:20

• Dynamic query with wildcard

  Hello
  
  I have a table1 as below
  
  ID (NUMBER), keyword (VARCHAR2)
  ----------------------------------------------------
  1, HAS
  2, B
  3, C
  
  Another table2
  
  Name (VARCHAR2)
  --------------------------
  Alice
  Bob
  Jack
  
  I need to write a stored procedure to check if the 2 mactched of the char keyword table1 table name. How to write the dynamic query in my PL/SQL in a stored procedure so that I can generate query similar to
  
  SELECT * from table2 where name like '%x %' where I need to replace X by the tank in table1
  
  Help, please.
  
  Thanks in advance,
  Marry

  I need to write a stored procedure to check if the 2 mactched of the char keyword table1 table name

  You could simply join the tables:

  SQL> with table1  as
  (
   select 1 id, 'A' keyword from dual union all
   select 2 id, 'B' keyword from dual union all
   select 3 id, 'C' keyword from dual
  ),
  table2 as (
   select 'Alice' name from dual union all
   select 'Bob' name from dual union all
   select 'Jack' name from dual
  )
  --
  --
  select * from table1, table2 where name like '%' || keyword  || '%'
  
          ID KEYWORD NAME
  ---------- ------- -----
           1 A       Alice
           2 B       Bob  
  
  2 rows selected.
  

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  I'm currently building an Apex application that will accomplish this dynamically built form in the frontend.
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  A brief overview of my code:
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  Hello

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  Have you created a branch on your page?

  Andy

• The value of a menu drop-down can be used in a SQL query?

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  Assuming that the SQL of this entity is as follows:

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  I want to use dynamic action with dates in APEX 5.0 picker such that after the selection of start_date and end_date interactive report should display data for the selected date range.

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  And if you remove it your selectors of dates format mask then you could be simpler:

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    from table1
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    and :p2_item
  

  You have need of other attributes.

• Need to check delays in update of 1000 lines using the PL/SQL procedure.

  Hi all

  I'm new to PL/SQL. I need your help to build a procedure that executes the following statement and follows the time of update of 1000 rows. This is to check the performance of the database. I need to print the timestamp of start before the update and end timestamp after update. I need to do for the 1000 lines. The statement that will be used in the procedure is:

  SELECT

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  "', W_INSERT_DT = ' | NVL (TO_CHAR (W_INSERT_DT), 'NULL') |', W_UPDATE_DT = ' | NVL (TO_CHAR (W_UPDATE_DT), 'NULL').

  ', START_DATE_WID =' | NVL (TO_CHAR (START_DATE_WID), 'NULL') |', END_DATE_WID = ' | NVL (TO_CHAR (END_DATE_WID), 'NULL') |', START_TIME =' |

  NVL (TO_CHAR (START_TIME), 'NULL') |', END_TIME =' | NVL (TO_CHAR (END_TIME), 'NULL'). "WHERE INTEGRATION_ID ="' | INTEGRATION_ID | " « ; »  OF XXAFL_MON_FACTS_F;

  The above query creates instructions of update that must be executed 1000 times and the time required to update the 1000 lines should be followed.

  Thanks in advance!

  Code horribly wrong!

  Why this approach?

  Dynamic SQL is almost NEVER needed in PL/SQL. And if you think it's necessary and taking into account what is displayed as being problems here, you have a 99% chance of being wrong.

  This 1% where dynamic SQL is necessary, he will WITH bind variables to create shareable SQL, decrease memory requests, decrease the likelihood of a fragmented shared reel and decrease the burning CPU cycles on hard analysis.

  An example below. Your approach is the 1st. One that is slower than the correct approach to 37 (x_!) ...

  SQL> create table t ( n number );
  
  Table created.
  
  SQL>
  SQL> var ITERATIONS number;
  SQL> exec :ITERATIONS := 100000;
  
  PL/SQL procedure successfully completed.
  
  SQL>
  SQL>
  SQL> TIMING START "INSERTs using Hard Parsing"
  SQL> declare
    2          i      integer;
    3  begin
    4          for i in 1..:ITERATIONS
    5          loop
    6                  execute immediate 'insert into t values ('||i||')';
    7          end loop;
    8          commit;
    9  end;
  10  /
  
  PL/SQL procedure successfully completed.
  
  SQL> TIMING SHOW
  timing for: INSERTs using Hard Parsing
  Elapsed: 00:02:00.33
  SQL>
  SQL> TIMING START "INSERTs using Soft Parsing"
  SQL> declare
    2          i      integer;
    3  begin
    4          for i in 1..:ITERATIONS
    5          loop
    6                  execute immediate 'insert into t values ( :1 )' using i;
    7          end loop;
    8          commit;
    9  end;
  10  /
  
  PL/SQL procedure successfully completed.
  
  SQL> TIMING SHOW
  timing for: INSERTs using Soft Parsing
  Elapsed: 00:00:06.06
  SQL> drop table t;
  
  Table dropped.
  
  SQL> create table t( n number );
  
  Table created.
  
  SQL>
  SQL>
  SQL> TIMING START "INSERTs using a single parse and repeatable statement handle "
  SQL> declare
    2          i      integer;
    3  begin
    4          for i in 1..:ITERATIONS
    5          loop
    6                  insert into t values ( i );
    7          end loop;
    8          commit;
    9  end;
  10  /
  
  PL/SQL procedure successfully completed.
  
  SQL> TIMING SHOW
  timing for: INSERTs using a single parse and repeatable statement handle
  Elapsed: 00:00:04.81
  SQL>