You want to derive all of that from all_tab_columns. (1) in the sub-query unpivoted_data, we had to know that there were 3 columns to be unpivoted, and that they were called x_amt, y_amt and z_amt. Column names are hard-coded in two places: , SUM (CASE WHEN type_val = 'Q4' THEN v ELSE 0 END)ĚS q4 - ***** Dynamic section 2 ***** , SUM (CASE WHEN type_val = 'Q3' THEN v ELSE 0 END)ĚS q3 - ***** Dynamic section 2 ***** , SUM (CASE WHEN type_val = 'Q2' THEN v ELSE 0 END)ĚS q2 - ***** Dynamic section 2 ***** , SUM (CASE WHEN type_val = 'Q1' THEN v ELSE 0 END)ĚS q1 - ***** Dynamic section 2 ***** WHEN 'Z_AMT' THEN z_amt - ***** Dynamic section 1 ***** WHEN 'Y_AMT' THEN y_amt - ***** Dynamic section 1 ***** WHEN 'X_AMT' THEN x_amt - ***** Dynamic section 1 ***** Here's a dynamic way to do this is Oracle 10, using theSQL*Plus command to handle the dynamic parts.įirst, let's see how we would do this using a static query:ĪND column_name NOT IN ('EMP_ID', 'TYPE_VAL')
![pivot in oracle 10g pivot in oracle 10g](https://i.stack.imgur.com/qkW7k.jpg)
SELECT * FROM (SELECT Designation, Deptnumber, Salary FROM Employee) PIVOT (SUM(Salary) Dept_SalFOR Deptnumber IN (select Deptno FROMEmp))
![pivot in oracle 10g pivot in oracle 10g](https://i.stack.imgur.com/5IS5x.jpg)
If you declare, it will return an error.īut Sub Query can be used in Pivot_In_Clause, see the example below. The above PIVOT Clause example returns an error “missing expression”.WHY?īecause that subquery return all department value means duplicate values that’s why in Pivot_In_Clause subquery is not allowed or not acceptable. SELECT * FROM (SELECT Designation, Deptnumber, Salary FROM Employee) PIVOT (SUM(Salary) Dept_Sal, COUNT(DeptNumber) Dept_Count FOR Deptnumber IN (select Deptnumber from employee)) The output showing summation of salary department wise and count of the employee Deptnumber wise who falls in the same department with the same designation and returns the result 4. In the above PIVOTClause, there are two columns (Salary & DeptNumber) are being used for aggregation in Pivot_Clause. SELECT * FROM (SELECT Designation, Deptnumber, Salary FROM Employee) PIVOT (SUM (Salary) Dept_Sal, COUNT(DeptNumber) Dept_Count FOR Deptnumber IN (10, 20)) In PIVOT clause, multiple columns can be used in Pivot_Clause.
![pivot in oracle 10g pivot in oracle 10g](https://docs.oracle.com/middleware/11119/bip/BIPRD/img/xdo11g_bld_rpt_pivot_tab.gif)
The alias name gets concatenated or added with Pivot_In_Clause using underscore ‘_’. In the above example, Dept_Sal is an Alias name of Pivot_Clause (SUM (Salary)). SELECT * FROM (SELECT Designation, Deptnumber, Salary FROM Employee) PIVOT (SUM (Salary) Dept_Sal FOR Deptnumber IN (10, 20, 30)) Pivot_In_Clause Alias || ‘_’ || Pivot_Clause Alias
![pivot in oracle 10g pivot in oracle 10g](https://technology.amis.nl/wp-content/uploads/2013/11/image.png)
SELECT * FROM (SELECT Name, Designation, Deptnumber, Salary FROM Employee) PIVOT (SUM (Salary) FORDeptnumber IN (10,20,30)) For that, we will use the below sample table (Employee) with 14records to understand the Oracle PIVOT Clause behavior. In this section we’ll see the implementation of Oracle PIVOT Clause and its behavior. It transforms multiple input rows into columns, aggregating data as part of the rotation process. Its main functionality is to transpose rows into the column. ThePIVOTclause is a key technique in many data warehouse applications. Subquery can be used for Pivot_In_Clause to get the column name. ORDER BY clause can be used for sorting the result but it could be the last clause. It’s not mandatory but it depends on the requirement. Note: Subquery can be used instead of Table_Name.