How to write efficient code in pl/sql using case

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  Select * from EMP_TEST;
  
  EMPNO, ENAME EMPSTATUS EMPDELFLAG
  
  1 a 0 model
  2 Perm 0 B
  3 c model 1
  4 d, Perm 1
  
  How to get data based on Empstatus and Empdelflag.
  
  Condition is then
  
  1: EMPDELFLAG = 0 and EMPSTATUS = dummy or Perm.
  2: EMPDELFLAG = 1 and EMPSTATUS = Perm can view EMPNO 1,2 and 4.
  
  On the other
  3: EMPDELFLAG = 1 and EMPSTATUS = dummy can display 3 EMPNO.
  
  I wanted to do this by using SQL, but I am not able to do. Please help me on this. Can it be done using the condition of the case?
  
  Select * from version of v$.
  
  BANNER
  
  Oracle Database 11 g Enterprise Edition Release 11.2.0.2.0 - 64 bit Production
  PL/SQL Release 11.2.0.2.0 - Production
  CORE Production 11.2.0.2.0
  AMT for IBM/AIX RISC System/6000: Version 11.2.0.2.0 - Production
  NLSRTL Version 11.2.0.2.0 - Production

  Hello

  583003 wrote:
  Hi Frank,.

  I'm sorry that I haven't posted Create Table and its insert statement.

  CREATE TABLE ITPCS. EMP_TEST...

  Thank you.
  Not everyone who wants to help you have a schema called ITPCS. Simply omit the schema name.

  Don't forget to post the exact results you want from these sample data.

  To your question, I would like to display EMPNO = 3 when EMPDELFLAG = 1 and EMPSTATUS = DUMMY. In all other conditions, it should display EMPNO 1,2,4.
  Please suggest on this.

  Assuming that empdelflag and empstatus cannot be NULL:

  SELECT       *
  FROM       emp_test
  WHERE       (    empdelflag     = 1
         AND  empstatus     = 'Dummy'
         AND  empno          = 3
         )
  OR       (   (  empdelflag     != 1
             OR empstatus     != 'Dummy'
             )
         AND empno          IN (1, 2, 4)
         )
  ORDER BY  empno          -- If wanted
  ;
  

  If empdelflag or empstatus can be NULL, so it's a little more complicated, but only a little.

  The results I get are:

  EMPNO ENAME      EMPSTATUS  E
  ----- ---------- ---------- -
      1 A          Dummy      0
      2 B          Perm       0
      3 C          Dummy      1
      4 D          Perm       1
  

  in other words, the entire table.

  Those are the reuslt you want? If so, maybe a few different examples of data, that includes lines that should be excluded for reasons varipous, would provide a better test.

  If these aren't the desired results, post the correct results. In places where the above results are false, explain why you don't want every given line.

• Re-write the code DOM node with SQL - XML funtions

  Hi friends,

  Could you please help to re - write the code using the following SQl - XML functions

  DECLARE

  l_domdoc dbms_xmldom. DOMDocument;

  l_xmltype XMLTYPE.

  l_root_node dbms_xmldom. DOMNode;

  l_departments_node dbms_xmldom. DOMNode;

  l_dept_element dbms_xmldom. DOMElement.

  l_dept_node dbms_xmldom. DOMNode;

  l_name_node dbms_xmldom. DOMNode;

  l_name_textnode dbms_xmldom. DOMNode;

  l_location_node dbms_xmldom. DOMNode;

  l_location_textnode dbms_xmldom. DOMNode;

  l_employees_node dbms_xmldom. DOMNode;

  l_emp_element dbms_xmldom. DOMElement.

  l_emp_node dbms_xmldom. DOMNode;

  l_emp_first_name_node dbms_xmldom. DOMNode;

  l_emp_first_name_textnode dbms_xmldom. DOMNode;

  l_emp_last_name_node dbms_xmldom. DOMNode;

  l_emp_last_name_textnode dbms_xmldom. DOMNode;

  BEGIN

  -Create an empty XML document

  l_domdoc: = dbms_xmldom.newDomDocument;

  -Create a root node

  l_root_node: = dbms_xmldom.makeNode (l_domdoc);

  -Create a new node departments and add it to the root node

  l_departments_node: = dbms_xmldom.appendChild (l_root_node

  , dbms_xmldom.makeNode (dbms_xmldom.createElement (l_domdoc, 'Deptartments'))

  );

  FOR r_dept IN (SELECT dept.department_id

  dept.department_name

  loc.city

  SERVICE dept

  JOIN the loc site

  ON loc.location_id = dept.location_id

  WHERE dept.department_id IN (10.20)

  )

  LOOP

  -For each folder, create a new item Dept with the service as an attribute ID.

  - and add this new Dept element in the node of departments

  l_dept_element: = dbms_xmldom.createElement (l_domdoc, "Dept");

  dbms_xmldom.SetAttribute (l_dept_element, 'Deptno', r_dept. Department_id);

  l_dept_node: = dbms_xmldom.appendChild (l_departments_node

  dbms_xmldom.makeNode (l_dept_element)

  );

  -Each node Dept will get a node names that contains the name of the service as a text

  l_name_node: = dbms_xmldom.appendChild (l_dept_node

  , dbms_xmldom.makeNode (dbms_xmldom.createElement (l_domdoc, 'Name'))

  );

  l_name_textnode: = dbms_xmldom.appendChild (l_name_node

  dbms_xmldom.makeNode (dbms_xmldom.createTextNode (l_domdoc, r_dept.department_name))

  );

  -Each node Dept will also get a node to the location that contains the location (city) in the form of text

  l_location_node: = dbms_xmldom.appendChild (l_dept_node

  , dbms_xmldom.makeNode (dbms_xmldom.createElement (l_domdoc, 'Location'))

  );

  l_location_textnode: = dbms_xmldom.appendChild (l_location_node

  dbms_xmldom.makeNode (dbms_xmldom.createTextNode (l_domdoc, r_dept.city))

  );

  -For each Department, add a node of employees

  l_employees_node: = dbms_xmldom.appendChild (l_dept_node

  , dbms_xmldom.makeNode (dbms_xmldom.createElement (l_domdoc, 'Employees'))

  );

  FOR r_emp IN (SELECT employee_id

  first name

  last_name

  Employees

  WHERE department_id = r_dept.department_id

  )

  LOOP

  -For each folder, create a new item Emp with the employee as an attribute ID.

  - and add this new element of the Emp to the employees node

  l_emp_element: = dbms_xmldom.createElement (l_domdoc, 'Emp');

  dbms_xmldom.SetAttribute (l_emp_element, "empid", r_emp.employee_id);

  l_emp_node: = dbms_xmldom.appendChild (l_employees_node

  dbms_xmldom.makeNode (l_emp_element)

  );

  -Each node emp will get a first name and a last name node that contains the first name and the last name text

  l_emp_first_name_node: = dbms_xmldom.appendChild (l_emp_node

  , dbms_xmldom.makeNode (dbms_xmldom.createElement (l_domdoc, "FirstName"))

  );

  l_emp_first_name_textnode: = dbms_xmldom.appendChild (l_emp_first_name_node

  dbms_xmldom.makeNode (dbms_xmldom.createTextNode (l_domdoc, r_emp.first_name))

  );

  l_emp_last_name_node: = dbms_xmldom.appendChild (l_emp_node

  , dbms_xmldom.makeNode (dbms_xmldom.createElement (l_domdoc, "LastName"))

  );

  l_emp_last_name_textnode: = dbms_xmldom.appendChild (l_emp_last_name_node

  dbms_xmldom.makeNode (dbms_xmldom.createTextNode (l_domdoc, r_emp.last_name))

  );

  END LOOP;

  END LOOP;

  l_xmltype: = dbms_xmldom.getXmlType (l_domdoc);

  dbms_xmldom.freeDocument (l_domdoc);

  dbms_output.put_line (l_xmltype.getClobVal);

  END;

  /

  
  

  Thank you and best regards,

  Arun Thomas T
  

  It's as simple as that:

  SQL> select xmlserialize(document
    2           xmlelement("Departments"
    3           , xmlagg(
    4               xmlelement("Dept"
    5               , xmlattributes(d.department_id as "Deptno")
    6               , xmlforest(
    7                   d.department_name as "Name"
    8                 , l.city as "Location"
    9                 )
   10               , xmlelement("Employees"
   11                 , (
   12                     select xmlagg(
   13                              xmlelement("Emp"
   14                              , xmlattributes(e.employee_id as "empid")
   15                              , xmlforest(
   16                                  e.first_name as "FirstName"
   17                                , e.last_name as "LastName"
   18                                )
   19                              )
   20                            )
   21                     from hr.employees e
   22                     where e.department_id = d.department_id
   23                   )
   24                 )
   25               )
   26             )
   27           )
   28           indent
   29         )
   30  from hr.departments d
   31       join hr.locations l on l.location_id = d.location_id
   32  where d.department_id in (10,20) ;
  
  XMLSERIALIZE(DOCUMENTXMLELEMEN
  --------------------------------------------------------------------------------
  
    
      Administration
      Seattle
      
        
          Jennifer
          Whalen
        
      
    
    
      Marketing
      Toronto
      
        
          Michael
          Hartstein
        
        
          Pat
          Fay
        
      
    
  
  

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  Note: I do not use forms Javascript here. It is an ACROJS Javascript folder.

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