Convert rows to columns for a Report - sql

Question

Using instructions found here I've tried to create a crosstab query to show historical data from three previous years and I would like to output it in a report.
I've got a few complications that are making this difficult and I'm having trouble getting the data to show correctly.
The query it is based on is structured like this:
EmpID | ReviewYearID | YearName | ReviewDate | SelfRating | ManagerRating | NotSelfRating |
1 | 5 | 2013 | 01/09/2013 | 3.5 | 3.5 | 3.5 |
1 | 6 | 2014 | 01/09/2014 | 2.5 | 2.5 | 2.5 |
1 | 7 | 2015 | 01/09/2015 | 4.5 | 4.5 | 4.5 |
2 | 6 | 2014 | 01/09/2014 | 2.0 | 2.0 | 2.0 |
2 | 7 | 2015 | 01/09/2015 | 2.0 | 2.0 | 2.0 |
3 | 7 | 2015 | 01/09/2015 | 5.0 | 5.0 | 5.0 |
[Edit]: Here is the SQL for the base query. It is combining data from two tables:
SELECT tblEmployeeYear.EmployeeID AS EmpID, tblReviewYear.ID AS ReviewYearID, tblReviewYear.YearName, tblReviewYear.ReviewDate, tblEmployeeYear.SelfRating, tblEmployeeYear.ManagerRating, tblEmployeeYear.NotSelfRating
FROM tblReviewYear INNER JOIN tblEmployeeYear ON tblReviewYear.ID = tblEmployeeYear.ReviewYearID;
[/Edit]
I would like a crosstab query that transposes the columns/rows to show historical data for up to 3 previous years (based on review date) for a specific employee. The end result would look something like this for Employee ID 1:
Year | 2015 | 2014 | 2013 |
SelfRating | 4.5 | 2.5 | 3.5 |
ManagerRating | 4.5 | 2.5 | 3.5 |
NotSelfRating | 4.5 | 2.5 | 3.5 |
Other employees would have less columns since they don't have data for previous years.
I'm having issues with filtering it down to a specific employee and sorting the years by their review date (the name isn't always a reliable way to sort them).
In the end I'm looking to use this as the data for a report.
If there is a different way than a crosstab query to accomplish this I would be okay with that as well.
Thanks!

Answer 1

You need a column for all the rating types, not an individual column for each type. If you can't redesign the table, I would suggest creating a new one for your purposes. The below uses a union to add in that type column referred to above. You create a column and hardcode the value (SelfRating, ManagerRating, etc):
SELECT * INTO EmployeeRatings
FROM (SELECT tblEmployeeYear.EmployeeId AS EmpId, ReviewYearId, "SelfRating" AS Category, SelfRating AS Score
FROM tblEmployeeYear
WHERE SelfRating Is Not Null
UNION ALL
SELECT tblEmployeeYear.EmployeeId, ReviewYearId, "ManagerRating", ManagerRating
FROM tblEmployeeYear
WHERE ManagerRating Is Not Null
UNION ALL
SELECT tblEmployeeYear.EmployeeId, ReviewYearId, "NotSelfRating", NotSelfRating
FROM tblEmployeeYear
WHERE NotSelfRating Is Not Null)
Then use the newly created table in place of tblEmployeeYear. Note that I use Year([ReviewDate]) which will return only the year. Also, since it looks like it may be possible to have more than one of each review type per year, I averaged the Score for the year.
TRANSFORM Avg(Score)
SELECT EmpId, Category
FROM (SELECT EmpId, Category, ReviewDate, Score
FROM tblReviewYear
INNER JOIN EmployeeRatings
ON tblReviewYear.ID = EmployeeRatings.ReviewYearID) AS Reviews
GROUP BY EmpId, Category
PIVOT Year([ReviewDate]);