I have a practice question that I am struggling with.
Here are:
image of the table
my code and the answer i get
the answer im SUPPOSED to get
Thanks.
As far as I understand, you get the TeachersAnswers result from the query.
I think that you may use the below query instead of yours :
SELECT horse_name, COUNT(place)
from horse h
left join entry e on e.horse_id = h.horse_id
where e.place = 1
group by horse_name
Related
New to SQL and I am trying to run a query that pulls all our item codes, lot number, and qty on hand.
Each lot number has multiple entries due to adjustments. I need a way of running my query and having it add or subtract to get the actual qty on hand for each lot and only show me lots that are in the negatives. I have tried playing with SSRS but I cant get it right. I'm using SQL 2008R2.
SELECT
IMLAYER.ITEM_CODE
,IMMSTR.ITEM_DESC
,IMLAYER.LOT_NO
,IMLAYER.QTY_ON_HAND
FROM
IMLAYER
INNER JOIN
IMMSTR
ON
IMLAYER.ITEM_CODE = IMMSTR.ITEM_CODE
WHERE
(IMLAYER.QTY_ON_HAND < 0);
I believe I understand the requirements correctly, but if not please comment and I can update the query:
SELECT
M.ITEM_CODE
,M.ITEM_DESC
,L.LOT_NO
,'SUM_OF_QTY_ON_HAND' = SUM(L.QTY_ON_HAND)
FROM
IMLAYER L
INNER JOIN
IMMSTR M
ON L.ITEM_CODE = M.ITEM_CODE
GROUP BY
M.ITEM_CODE
,M.ITEM_DESC
,L.LOT_NO
HAVING
SUM(L.QTY_ON_HAND) < 0
HAVING is the trick you are looking for to be able to use an aggregate function for filtering.
My query here has a sub-query in it but it returns no output, but in reality it has to give some output because I manually checked and output exists.I have posted the query below.
select mac.mac_id,mac.mac1,mac.mac_type,record.soc_id
from mso_charter.mac
join record on mac.record_id = record.record_id
where mac.mac_type='ethB' and record.soc_id IN (select soc from d);
Sample data is below
mac_id mac1 mac_type record_id--- for table mac
1 6142 ethA 1
2 6412 ethB 1
3 2313 ethC 1
record_id soc_id ---- for table record
1 Qu132
1 as432
1 342aq
soc --- for table d
a12w2
23we
qw12
mso_charter is the schema name mac,d and record is the table name.
Note that your subquery is actually still a join and can be written that way:
select mac.mac_id,mac.mac1,mac.mac_type,record.soc_id
from mso_charter.mac
join record using(record_id)
join d on record.soc_id = d.soc
where mac.mac_type='ethB';
As per the comment we still need a data set to reproduce and help.
Should be select soc_id from d instead of select select soc from d
According to your sample data, d has a column soc_id. That should be used for the comparison:
select m.mac_id, m.mac1, m.mac_type, r.soc_id
from mso_charter.mac m join
record r
on m.record_id = r.record_id
where m.mac_type = 'ethB' and
r.soc_id in (select d.soc_id from d);
It is possible that ids look the same but are not, because of international characters, hidden characters, spaces in the wrong place, and so on.
If this doesn't work then try the following:
Remove the soc_id condition and see if any rows match the first condition and join.
If that still returns nothing, remove the entire where clause to see if anything matches the join.
None of your record.soc_id match any of your d.soc_id. So you get no row.
Also, you write select soc from d. soc, not soc_id. Typo or error?
So, thanks to all who tried helping me in this situation. I actually had did a very silly mistake.The reason I am posting the right answer is probably because if someone else in future get stuck in such a issue or something similar it would be helpful to them.
select m.mac_id,m.mac,m.mac_type,r.soc_id
from mso_charter.mac m
join mso_charter.record r on m.record_id = r.record_id
where m.mac_type = 'ethB' and r.soc_id IN (select d.soc_id from d);
Mistake was I had not mentioned the schema name while performing join and there were multiple tables named record in other schema's, it was just out of frustration we tend to forget small things which costed me few hours to work over.
I've got the code below which displays the location_id and total number of antisocial crimes but I would like to get the location_name from a different table called location_dim be output as well. I tried to find a way to UNION it but couldn't get it to work. Any ideas?
SELECT fk5_location_id , COUNT(fk3_crime_id) as TOTAL_ANTISOCIAL_CRIMES
from CRIME_FACT
WHERE fk1_time_id = 3 AND fk3_crime_id = 1
GROUP BY fk5_location_id;
You want to use join to lookup the location name. The query would probably look like this:
SELECT ld.location_name, COUNT(cf.fk3_crime_id) as TOTAL_ANTISOCIAL_CRIMES
from CRIME_FACT cf join
LOCATION_DIM ld
on cf.fk5_location_id = ld.location_id
WHERE cf.fk1_time_id = 3 AND cf.fk3_crime_id = 1
GROUP BY ld.location_name;
You need to put in the right column names for ld.location_name and ld.location_id.
you need to find a relationship between the two tables to link a location to crime. that way you could use a "join" and select the fields from each table you are interested in.
I suggest taking a step back and reading up on the fundamentals of relational databases. There are many good books out there which is the perfect place to start.
LEFT JOIN PatientClinics AB ON PPhy.PatientID = AB.PatientID
JOIN Clinics CL ON CL.ID = AB.ClinicID
AND COUNT(AB.ClinicID) = 1
I get error using Count(AB.ClinicID) = 1 (ClinicID has duplicate values in the table and
I want to use only 1 value of each duplicate value of ClinicId to produce result)
What mistake am I making?
I've never seen a COUNT() being used in a JOIN before. Maybe you should use:
HAVING COUNT(AB.ClinicID) = 1
instead.
Count() can't be used as a join/filter predicate. It can be used in the HAVING clause however. You should include the entire query in order to get a better example of how to rewrite it.
maybe investigate the HAVING clause instead of using COUNT where you put it.
hard to help without the full query.
I want to know how many users answerd a question, so I made that query :
SELECT answer.idAnswer,
answer.title,
answercategory.label,
(SUM(1)) as nbAnswer
FROM ANSWER
INNER JOIN answerCategory ON answer.idAnswerCategory = answercategory.idAnswerCategory
LEFT JOIN answerUser ON answer.idAnswer = answerUser.idAnswer
GROUP BY answer.idAnswer
Its almost working, the only thing that doesn't work is that it's giving me "one" answer if nobody answered the question (it means even if there are no records in answerUser). I would like to have zero instead of one in that case. If I add a "-1", when there is one answer, I'll get zero. Any idea how I can correct that?
Use COUNT(answerUser.idAnswer) instead of SUM(1). Count will ignore the NULL rows created by the LEFT JOIN.
Use COUNT(*) instead of SUM(1).
SELECT answer.idAnswer, answer.title, answercategory.label, count(*) as nbAnswer
FROM answer
INNER JOIN answerCategory on answer.idAnswerCategory = answercategory.idAnswerCategory
LEFT JOIN answerUser ON answer.idAnswer = answerUser.idAnswer
GROUP BY answer.idAnswer