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I have a quick sql data as below,
Customerid,Type
1,Adult
1,Adult
2,Adult
3,Adult
4,Teenager
4,Adult
I want the query that lists those customer no.s that do not have any other Type associated with them. For eg. 1 as only Adult associated with, same with 2. But 3 and 4 have multiple Types associated with them.
I am trying to get an output as below.
Customerid,Type
1,Adult
2,Adult
3,null
How should we tackle this.
You seem to want:
select customerid
, (case when min(type) = max(type) then min(type) end) as type
from table t
group by customerid;
Related
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There is no error, but the results show the values excluding the row that meets both conditions. The result shows 3, in fact, it should be 4 excluding data that has 22 for age and UK for the country. Any idea why the result is 3, not 4?
SELECT COUNT(*) FROM CUSTOMERS WHERE CUSTOMERS.AGE = '22' OR CUSTOMERS.COUNTRY = 'UK';
You have two customers at the age of 22 and 2 residing in the UK.
This is actually a correct result here - how on earth do you come to the conclusion that you have four people meeting that criteria? If more than one point matches for a database entry, it will only count as one for the result, since it's still the same database entry.
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Need a query to check ids with multiple revisionnums
id reviionnum
1 0
2 0
1 1
3 1
2 1
The query should result
id revisionnum
3 1
Please help
If you want ids with only one revision number, you can use aggregation:
select id, min(revissionnum)
from t
group by id
having count(*) = 1;
The min() is the value if there is only one row.
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I have a table with data like:
cust_id, acct_no, ind
123111, 1233, Y
123111, 2311, N
222111, 1112, N
222111, 2111, N
I have to get output as cust_id, 1 (a binary indicator if any of the acct under that customer is Y)
so from the above table I have to get below output.
123111 1
222111 0
A simple way to achieve this is something like:
select cust_id, max(case when ind = 'Y' then 1 else 0 end) as flag from customers group by cust_id;
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How can I possibly select a part of a row data in MS Sql?
ex. Charmina (Female)
All I want to select is the Female not the whole Charmina (Female)
Try this
select substring('Charmina (Female)',
charindex('(','Charmina (Female)')+1,
LEN('Charmina (Female)')-charindex('(','Charmina (Female)')-1)
or
select stuff('Charmina (Female)',1,charindex('(','Charmina (Female)')-1,'')
You may Use SUBSTRING to get sub sequences of strings
SELECT SUBSTRING( your_Raw ,start , length ) AS Alias
FROM Your_Table
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Instead of ASC or DESC, I want my query results to be in a specific, custom order.
For example, instead of A, B, C, D..., what if I wanted my results in, P, A, L, H...?
I have tried using case but not successfully
SELECT * FROM Customers
ORDER BY case country
when 'P' then 1 …
E.g., here, I'm trying to create a custom order on the Country column:
SELECT * FROM Customers
ORDER BY case when country = 'P' then 1
when country = 'A' then 2
when country = 'L' then 3
when country = 'H' then 4
else 5
end asc