How to pivot data into multiple columns in Oracle?
Introduction to Oracle PIVOT clause. Oracle 11g introduced the new PIVOT clause that allows you to write cross-tabulation queries which transpose rows into columns, aggregating data in the process of the transposing. As a result, the output of a pivot operation returns more columns and fewer rows than the starting data set.
How does pivot function work in Oracle 11g?
Oracle 11g introduced the new PIVOT clause that allows you to write cross-tabulation queries which transpose rows into columns, aggregating data in the process of the transposing. As a result, the output of a pivot operation returns more columns and fewer rows than the starting data set.
How does pivot in XML work in Oracle?
The XML string for each row contains aggregated data corresponding to the implicit GROUP BY value of that row e.g., number of orders ( ORDERS) and total sales ( SALES ). When you use a subquery in the pivot_in_clause, Oracle uses all values returned by the subquery for pivoting.
How to use pivot clause in order stats?
Second, query data from the new order_stats view: Third, use PIVOT clause to return the number of orders and order values by product category and order status:
Why are null values used in Oracle pivot?
Any NULL values are because no data exists. For example, there are no sales in the west location for customer_id 2. When using the PIVOT keyword, any columns not mentioned in the FOR clause are used as part of the Oracle PIVOT GROUP BY. In the above example, the only column was the location column, which was OK.
What’s the difference between UNPIVOT and pivot in Oracle?
The SQL PIVOT keyword we’ve looked at above will translate rows into columns. Oracle offers an UNPIVOT keyword, which performs the opposite. It transforms columns into rows. It allows you to treat NULL values in a specific way. It does not include the XML keyword.