SQL merging lines into one line - sql

Question

I have a question about an SQL query.
I have a table with these column names:
date time route_id name
(and other columns not included here):
Date
route_id
Time
Name
2022-02-04
320
11:40:00
Taxi
2022-02-04
320
14:35:00
Taxi
I have made the following query:
Select
date,
LEFT(route_id_intern,4) as route_id,
CASE
WHEN time < '12:00:00' THEN 'Morning'
ELSE 'Free' END as 'Morning',
CASE
WHEN time > '12:00:00' THEN 'Afternoon'
ELSE 'Free' END as 'Afternoon',
Name,
FROM [DW2].[dbo].[FCT_RITTEN]
where year(date) = 2022 and month(date)=02 and day(date) = 04
and LEFT(route_id_intern,4) = 3209
My query gives the following result:
Date
route_id
Moring
Afternoon
Name
2022-02-04
320
Morning
Free
Taxi
2022-02-04
320
Free
Afternoon
Taxi
The data stays separated in two lines but I would like to have following result:
Date
route_id
Moring
Afternoon
Name
2022-02-04
320
Morning
Afternoon
Taxi
I have tried several methods but I keep getting these separated lines.
Please note the used data is anonymized for the data in the above samples but the problem stays the same.
Update:
After the reply of #HoneyBadger, I have amended my query:
Select
date,
LEFT(route_id_intern,3) as route_id,
MAX(CASE
WHEN time <= '12:00:00' THEN '1'
ELSE '0' END) as 'Morning',
MAX(CASE
WHEN time > '12:00:00' THEN '1'
ELSE '0' END) as 'Afternoon'
FROM [DW2].[dbo].[FCT_RITTEN]
where date = '2022-02-04'
and LEFT(route_id_intern,4) = 320
group by date, route_id_intern
Unfortunately, the result is still not as needed:
Date
route_id
Morning
Afternoon
2022-02-04
320
1
0
2022-02-04
320
0
1

Answer 1

You are almost there I guess. Removing the group by and putting your query inside a cte and then playing with the time column a bit as below will give you the desired result.
;with cte as(
Select
date,
LEFT(route_id_intern,4) as route_id,
CASE
WHEN max(time)over(partition by date,name order by date) > '12:00:00'
and count(1)over(partition by date,name order by date) > 1
THEN 'Morning-Afternoon'
WHEN max(time)over(partition by date,name order by date) = '12:00:00'
and count(1)over(partition by date,name order by date) > 1
THEN 'Morning-Lunch'
when max(time)over(partition by date,name order by date) > '12:00:00'
and count(1)over(partition by date,name order by date) = 1
then 'Free-Afternoon'
when max(time)over(partition by date,name order by date) < '12:00:00'
and count(1)over(partition by date,name order by date) = 1
then 'Morning-Free'
END as 'day',
Name,
FROM [DW2].[dbo].[FCT_RITTEN]
where year(date) = 2022 and month(date)=02 and day(date) = 04
and LEFT(route_id_intern,4) = 3209
)
select distinct Date,route_id
,SUBSTRING([day],1,charindex('-',[day])-1) as [Morning]
,SUBSTRING([day],charindex('-',[day])+1,len([day])) as [Afternoon]
,name
from cte

Answer 2

One the challenges here is that your sample data and query don't line up. There are columns referenced in your query not in your sample data. I think this is likely because you obfuscated the real information so much that some details got lost. I made some best guesses and I think that what you need is conditional aggregation. At the very least this will return the desired output you wanted based (mostly) on the sample provided.
create table FCT_RITTEN
(
MyDate date
, route_id int
, MyTime time
, Name varchar(10)
)
insert FCT_RITTEN
select '20220204', 320, '11:40:00', 'Taxi' union all
select '20220204', 320, '14:35:00', 'Taxi'
Select
MyDate
, route_id
, Morning = max(CASE WHEN MyTime < '12:00:00' THEN 'Morning' END)
, Afternoon = max(CASE WHEN MyTime > '12:00:00' THEN 'Afternoon' END)
, Name
FROM [dbo].[FCT_RITTEN]
where MyDate = '20220204'
and route_id like '320%' --Why are you doing a string comparison on an integer column?
group by MyDate
, route_id
, Name