select true/false based on col value in a group by - sql-server

Question

Sorry if the title is not clear. I have a simple table T1
counter int, not null
type nvarchar(250), not null
name nvarchar(50), not null
I'm summing up the counters grouped by type, Like this:
select sum(counter), type
from T1
group by type;
I want to select one more field which is boolean (true/false) which is any of the names contains a specific text i.e. if name like '%Bassem%' then select true. But I can not figure it out since I'm using group by.

Answer 1

Here's a way to do this.
First create a test table and insert some values:
CREATE TABLE dbo.T
(
[counter] int not null,
[type] nvarchar(250) not null,
[name] nvarchar(50) not null
);
INSERT INTO dbo.T ([counter], [type], [name])
VALUES (1, N'Alpha', N'Bassem Akl'),
(2, N'Alpha', N'aaaaa'),
(3, N'Alpha', N'Akl Bassem'),
(4, N'Bravo', N'bbbbb'),
(5, N'Bravo', N'A Bassem'),
(6, N'Charlie', N'ccccc'),
(7, N'Charlie', N'ddddd');
Then use a CTE (common table expression) to determine if the name contains the text you are searching for. You don't have to use a CTE here, but it makes the overall SELECT statement easier to understand.
WITH cte AS
(
SELECT [counter], [type], IIF([name] LIKE N'%Bassem%', 1, 0) AS 'contains'
FROM dbo.T
)
SELECT SUM([counter]) AS 'SumCounter', [type], CAST(MAX([contains]) AS bit) as 'contains'
FROM cte
GROUP BY [type];
Note that Transact-SQL doesn't have a Boolean data type; instead it has a bit type. See Books Online > bit (Transact-SQL) -- https://msdn.microsoft.com/en-gb/library/ms177603.aspx

Answer 2

select sum(counter), type,
max(case when name like '%value%' then true else false end ) as 'Booleanvalue'
from T1
group by type;
you can do this as well,but you may want to do a distinct later using cte or derived table
select sum(counter) over (partition by type order by type),
type,
case when name like '%value%' then true else false end as 'Booleanvalue'
from table

Answer 3

WITH cte as
(
SELECT counter, type, IIF(name like '%Bassem%', 1, 0) as b
FROM #t
)
select sum(counter), type, CAST(max(b) as bit)
from cte
group by type;

Answer 4

A simple CASE statement gets it done.
SELECT SUM(foo.counter)
, type
, CASE WHEN foo.type = 'type a' THEN 1 ELSE 0 END AS true_false
FROM (VALUES (1, 'type a'), (2, 'type b')) AS foo(counter, type)
GROUP BY type;