SQL Query To Display One Row of Several Columns Into One Column of Several Rows



Question: How to display one row of several columns into one column of several rows?
Or
Pivoting one row of several columns into one column of several rows.
Or
How to pivote one row of several columns into one column of several rows.

For Example consider the following screenshot:


Expected Result:


Answer: Following SQL Query can be used to display one row of several columns into one column of several rows:

SELECT
  emp_detail,
  case
       when emp_detail = 'ID' then ID
       when emp_detail = 'NAME' then NAME
       when emp_detail = 'JOB' then JOB
       when emp_detail = 'SALARY' then SALARY
       when emp_detail = 'DEPARTMENT' then DEPARTMENT
   end as value
FROM
(
  SELECT
     pivoter.emp_detail,
     ID,
     NAME,
     JOB,
     SALARY,
     DEPARTMENT
  FROM
    emp 
    cross join
    (
      select 'ID' as emp_detail from dual
      UNION ALL
      select 'NAME' as emp_detail from dual
      UNION ALL
      select 'JOB' as emp_detail from dual
      UNION ALL
      select 'SALARY' as emp_detail from dual
      UNION ALL
      select 'DEPARTMENT' as emp_detail from dual
          )pivoter
);

Let us know if you face any problem in the query.

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Oracle Apps Guy: SQL Query To Display One Row of Several Columns Into One Column of Several Rows
SQL Query To Display One Row of Several Columns Into One Column of Several Rows
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