Im trying to group two queries by year so that it will show the amount of tours done(by count of tour id) in that year
Assuming [Date] contains "year" values (i.e. 2018, 2017, 2016, ..)

;With SchoolTours AS 
(
SELECT [Date] AS YEAR, COUNT(ID) AS [SchoolCountOfTour ID] 
FROM [school tours done showing year] 
GROUP BY [Date]
)
, VisitorTours AS
(
SELECT [Date] AS YEAR, COUNT(ID) AS [VisitorCountOfTour ID] 
FROM [Visitor Tours Done Showing Year]
GROUP BY [Date]
)
SELECT t1.Year
, t1.[SchoolCountOfTour ID] 
, t2.[VisitorCountOfTour ID]
FROM SchoolTours t1
LEFT JOIN VisitorTours t2 ON t2.Year = t1.Year


Plenty of other ways to do it but I'm partial to CTEs

B