How can I combine these columns in SQL Server Management Studio (SSMS)

Question

I am using SMSS v17.3

added- select @@version shows "Microsoft SQL Server 2014 - 12.0.2269.0 (X64) Jun 10 2015 03:35:45 Copyright (c) Microsoft Corporation Enterprise Edition (64-bit) on Windows NT 6.1 (Build 7601: Service Pack 1) "

I have

-- Book = book name.
-- Ch=chapter V=verse

CREATE TABLE dbo.flow1(Id int, A varchar(10), B varchar(10), Book varchar(10), Ch INT, V INT)

INSERT INTO dbo.flow1 VALUES(1, 'qwe', 'asd', 'gggg', 3, 44)
INSERT INTO dbo.flow1 VALUES(2, 'qwe', 'asd', 'asdf', 43, 11)
INSERT INTO dbo.flow1 VALUES(3, 'erw', 'asd', 'fsef', 12, 53)
INSERT INTO dbo.flow1 VALUES(4, 'erw', 'zre', 'vxde', 53, 12)
INSERT INTO dbo.flow1 VALUES(5, 'vwe', 'hwa', 'vwhe', 11, 51)
INSERT INTO dbo.flow1 VALUES(6, 'rwq', 'yha', 'bgda', 63, 12)
INSERT INTO dbo.flow1 VALUES(7, 'qwe', 'asd', 'faaa', 32, 61)
INSERT INTO dbo.flow1 VALUES(8, 'rwq', 'yha', 'fsag', 35, 3)

SELECT A,B,COUNT(Id) as cnt  FROM dbo.flow1 GROUP BY A,B;

What I would like is

A while back I tried fiddling around with CONCAT to do it, I would include what I tried here but I can't find it, anyhow I never quite managed it at the time.

Answer 1

select 
    A,
    B,
    Cnt = count(Id),
    Concatted =
    stuff
        (
            (
                select concat(',', Book, ' ', Ch, ':', V)
                from Flow1 i
                where o.A = i.A
                    and o.B= i.B
                for xml path(''), type
            ).value('.', 'nvarchar(max)'),
            1, 1, ''
        )

from flow1 o
group by A,B