SQL Query: customer name including activity count - sql-server

Question

There's probably a very simple solution to this that I'm not seeing right now.
I need a script for an SQL report. I can get all customer names in a simple SELECT:
SELECT
t5.[Name] AS CustomerName
FROM
[T5] t5
WHERE
t5.Type IN (1, 2)
ORDER BY
t5.[Name]
This gives me an ordered list for the dropdown menu, to select the customer name. The result set looks like this:
CustomerName
------------
Customer 1 Name
Customer 2 Name
Customer 3 Name
...
But I don't just need the name, I need the number of related activities to that customer name inside the name string as well. For example, with 38 activities for that customer it should look like : "(38) Customer Name here"
The statement giving me the correct count for one particular customer (in this example, "Customer 5 Name") looks something like this, it needs a couple of joins to get there:
SELECT
COUNT(*)
FROM
[T1] t1
INNER JOIN
[T2] t2 ON t2.[ID] = t1.[Activity]
INNER JOIN
[T3] t3 ON t3.[ID] = t2.[Username]
INNER JOIN
[T4] t4 ON t4.[ID] = t3.[ID]
INNER JOIN
[T5] t5 ON t5.[ID] = t4.[X]
WHERE
t5.[Name] = 'Customer 5 Name'
Now obviously I need to combine these somehow, to get the following result set:
CustomerName
-------------------
(a) Customer 1 Name
(b) Customer 2 Name
(c) Customer 3 Name
(d) Customer 4 Name
(e) Customer 5 Name
(f) Customer 6 Name
...
(a-f being the respective activity count for that customer)
Thanks for help!

Answer 1

WITH pre AS
(
SELECT t5.[Name] AS CustomerName, COUNT(*) AS ActivityCount
FROM [T1] t1
INNER JOIN [T2] t2 ON t2.[ID] = t1.[Activity]
INNER JOIN [T3] t3 ON t3.[ID] = t2.[Username]
INNER JOIN [T4] t4 ON t4.[ID] = t3.[ID]
INNER JOIN [T5] t5 ON t5.[ID] = t4.[X]
WHERE t5.Type IN (1, 2) AND t5.[Name] = 'Customer 5 Name'
GROUP BY t5.Name
)
SELECT '(' + ActivityCount + ') ' + CustomerName
FROM pre

Answer 2

You should use group by
SELECT
t5.[Name], COUNT(*)
FROM
[T1] t1
INNER JOIN
[T2] t2 ON t2.[ID] = t1.[Activity]
INNER JOIN
[T3] t3 ON t3.[ID] = t2.[Username]
INNER JOIN
[T4] t4 ON t4.[ID] = t3.[ID]
INNER JOIN
[T5] t5 ON t5.[ID] = t4.[X]
group by t5.[Name]

Answer 3

I Think this will give you the number with the customer name as per your requirement.
SELECT
'(' + CAST(COUNT(*) AS nvarchar(4) ) + ') ' + t5.[Name] as [CustomerName]
FROM
[T1] t1
INNER JOIN
[T2] t2 ON t2.[ID] = t1.[Activity]
INNER JOIN
[T3] t3 ON t3.[ID] = t2.[Username]
INNER JOIN
[T4] t4 ON t4.[ID] = t3.[ID]
INNER JOIN
[T5] t5 ON t5.[ID] = t4.[X]
group by t5.[Name]