How to efficiently transform narrow table into wide in oracle?

@wilmer.lemke 

One efficient way to transform a narrow table into a wide table in Oracle is to use the PIVOT function. Here are the steps to achieve this:

1. Identify the columns that you want to pivot. These columns will become the new wide columns in the table.
2. Use the PIVOT function along with an aggregate function (such as SUM, MAX, MIN, etc.) to pivot the data. The syntax for the PIVOT function is as follows:

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SELECT *
FROM narrow_table
PIVOT (
   aggregate_function(column_to_pivot)
   FOR pivot_column IN (value1, value2, value3, ...)
);

1. Replace "narrow_table" with the name of your narrow table, "aggregate_function" with the desired aggregate function (e.g. SUM, MAX, MIN), "column_to_pivot" with the column you want to pivot, and "value1, value2, value3, ..." with the values you want to pivot.
2. Execute the query to pivot the data and create the wide table.
3. You can also use the UNPIVOT function to reverse the pivot operation if needed.

By following these steps and using the PIVOT function in Oracle, you can efficiently transform a narrow table into a wide table.