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Software ==>	SSIS Integration Services (28 exercises)
Topic ==>	Conditional split transforms (5 exercises)
Level ==>	Harder than average
Subject ==>	SSIS training

Use a variety of transforms to summarise Brexit voting figures by leave or remain status

This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.

Before you can do this exercise, you'll need to download and unzip this file .

The aim of this exercise is to produce a text file showing the Brexit voting figures, with the largest differences between leave and remain votes coming first:

Dudley (shown highlighted) was the leave area with the highest absolute difference in votes between leave and remain, but it was only 6th in order of absolute difference in votes cast.

To do this, you'll need to derive the Status column shown above, and also calculate the absolute difference and sort by this.

If you're feeling brave, you could continue without turning the page for help!

Here's what the final package could look like:

A suggestion for how to solve this problem - a guide to each step follows.

Here's what each step could do:

Step	What it could do
1	Import the Excel workbook contained in the folder at the top of this exercise.
2	A conditional split to determine if the leave votes exceeded the remain ones.
3	A derived column transform to create a new field called Status, and set it to Leave.
4	A derived column transform to create a new field called Status, and set it to Remain.
5	A Union All transform to unite leavers and remainers (if only it were that simple).
6	Use the ABS function in a derived column transform to work out the difference between leave and remain votes, ignoring any sign.
7	Sort by this newly calculated column.
8	Send the output to a new flat file.