I have the following 3 tables
Source
Id | Name | SiteId
---+--------------+---------
1 | Source 1 | 1
2 | Source 2 | 1
3 | Source 3 | 2
4 | Source 4 | 2
SourceAccount
SourceId | AccountId
---------+----------
1 | 1
2 | 1
3 | 1
4 | 1
SourceUser
SourceId | UserId
---------+----------
1 | 1
3 | 1
I'm trying to build up a query with thew following parameters
SiteId (1)
AccountId (1)
UserId (1)
With those parameters the query should return something like this
SourceId | Name | Access
---------+--------------+---------
1 | Source 1 | 1
2 | Source 2 | 0
Access column being a boolean (bit)
So in essence the query should return all the sources (Id and Name) that are part of a given AccountId for a given SiteId along with a boolean telling me is a user has access to it or not.
Any idea on how to proceed?
Thanks
EDIT:
For the record here is the query I came up with but does not work:
SELECT s.[Id], s.[Name]
,(IF EXISTS (SELECT 1 FROM [dbo].[SourceUser] su WHERE su.SourceId = s.[Id] AND su.UserId = 1)
SELECT CAST(1 AS BIT)
ELSE
SELECT CAST(0 AS BIT))
FROM [dbo].[Source] s
INNER JOIN [dbo].[SourceAccount] sa ON sa.SourceId = s.Id
WHERE sa.AccountId = 1
AND s.SiteId = 1
Might also be worth mentionning that I'm running this on SQL Azure and SQL Server 2012
EDIT 2: Relations
SiteAccount - Site - SiteUser - User
| \ |
Account - SourceAccount - Source - SourceUser
Try this:
SELECT s.[Id],
s.[Name],
CASE WHEN EXISTS (SELECT 1 FROM [dbo].[SourceUser] su WHERE su.SourceId = s.[Id] AND su.UserId = 1)
THEN CAST(1 AS BIT)
ELSE CAST(0 AS BIT)
END AS Access
FROM [dbo].[Source] s
INNER JOIN [dbo].[SourceAccount] sa ON sa.SourceId = s.Id
WHERE sa.AccountId = 1 AND s.SiteId = 1
Related
For a "products reservation system", I have 2 tables :
"RD", for global reservations data (fieds: ID, CustomerID, Date, ...)
"RP", for reserved products data per reservation (fields: ID, RD_ID, ProductID, Status, ...). RD_ID fits with the ID in RD table (field for joining). Status field can have these values: O, C, S.
I need to extract (with 2 Select instructions) the list of reservations and the number of reservations for which all products have status 'O' .
Data example for RP:
ID | RD_ID | ProdID | Status
----------------------------
1 | 1 | 100 | O
2 | 1 | 101 | O
3 | 1 | 102 | O
4 | 2 | 105 | O
5 | 2 | 100 | S
6 | 3 | 101 | C
7 | 3 | 102 | O
In this example, Select statement should return only RD_ID 1
For the number of ID, the following request does not work because it also includes reservations with products having different status:
SELECT COUNT(rd.ID) FROM rd INNER JOIN rp ON rp.RD_ID = rd.ID WHERE rp.Status = 'O';
Could you help me for the right Select statement?
Thank you.
SELECT rd.ID, COUNT(rd.ID) CountOfRD, status
FROM rd INNER JOIN rp ON rp.RD_ID
GROUP BY rd.ID, status
Use not exists as follows:
Select t.* from your_table t
Where t.status = 'O'
And not exists (select 1 from your_table tt
Where t.rd_id = tt.rd_id
And t.status != tt.status)
You can also use group by and having as follows:
Select rd_id
From your_table t
Group by rd_id
Having sum(case when status <> 'O' then 1 end) > 0
I'm currently working on a select query in T-SQL on SQL Server 2012. It's a complex query, I want to query a list from 3 tables. The result should look something like this:
Desired Output:
ProjectId | Title | Manager | Contact | StatusId
----------+-------------+-----------+-----------+-----------
1 | projectX | 1123 | 4453 | 1
2 | projectY | 2245 | 5567 | 1
3 | projectZ | 3335 | 8899 | 1
My 3 Tables:
1) Project: ProjectId, ProjectDataId, MemberVersionId
2) ProjectData: ProjectDataId, Title, StatusId
3) Members: MemberId, MemberVersionId, MemberTypeId, EmployeeId
The tricky part is, to implement versioning. Thus, over time the project Members can change, and it should always be possible to return to a previous version, that's why I use MemberVersionId as a foreign key inbetween Project and Members. The tables Project and ProjectData a linked with ProjectDataId.
Hence, 1 Project has 1 OfferData and 1 Project has N Members.
Some sample data:
Project
ProjectId | ProjectDataId | MemberVersionId |
----------+---------------+-----------------+
1 | 2 | 1 |
2 | 3 | 1 |
3 | 4 | 1 |
ProjectData
ProjectDataId | Title | StatusId
--------------+-------------+-----------
2 | projectX | 1
3 | projectY | 1
4 | projectZ | 1
Members: MemberTypeId 1 = Manager, MemberTypeId 2 = Contact, 3 = Other
MemberId | MemberVersionId | MemberTypeId | EmployeeId |
---------+-----------------+--------------+------------+
1 | 1 | 1 | 1123 |
2 | 1 | 2 | 4453 |
3 | 1 | 3 | 9999 |
4 | 2 | 1 | 2245 |
5 | 2 | 2 | 5567 |
6 | 2 | 3 | 9999 |
7 | 3 | 1 | 3335 |
8 | 3 | 2 | 8899 |
9 | 3 | 3 | 9999 |
My current query looks like this:
SELECT ProjectId, Title, EmployeeId AS Manager, EmployeeId AS Contact, StatusId
FROM [MySchema].[Project] a,
[MySchema].[ProjectData] b,
[MySchema].[Members] c
WHERE a.ProjectDataId = b.ProjectDataId
AND a.MemberVersionId = c.MemberVersionId
Unfortunately this doesn't work yet. Do you know how to solve this issue?
Thanks
Something like this?
SELECT
p.ProjectId,
pd.Title,
mm.EmployeeId AS Manager,
mc.EmployeeId AS Contact,
pd.StatusId
FROM
[MySchema].[Project] p
INNER JOIN [MySchema].[ProjectData] pd ON pd.ProjectDataId = p.ProjectDataId
INNER JOIN [MySchema].[Members] mm ON mm.MemberVersionId = p.MemberVersionId AND mm.MemberTypeId = 1
INNER JOIN [MySchema].[Members] mc ON mc.MemberVersionId = p.MemberVersionId AND mc.MemberTypeId = 2;
You can try this:
SELECT ProjectId, Title, C.EmployeeId AS Manager, d.EmployeeId AS Contact, StatusId
FROM [MySchema].[Project] a
INNER JOIN [MySchema].[ProjectData] b ON A.ProjectDataId=B.ProjectDataId
LEFT JOIN (SELECT * FROM [MySchema].[Members] WHERE MemberTypeID=1) c ON a.MemberVersionId=c.MemberVersionId
LEFT JOIN (SELECT * FROM [MySchema].[Members] WHERE MemberTypeID=2) d ON a.MemberVersionId=d.MemberVersionId
You must select members two times, one for the manager and another for contact:
SELECT ProjectId, Title, m.EmployeeId AS Manager, c.EmployeeId AS
Contact, StatusId
FROM [MySchema].[Project] a,
[MySchema].[ProjectData] b,
[MySchema].[Members] m
[MySchema].[Members] c
WHERE a.ProjectDataId = b.ProjectDataId
AND a.MemberVersionId = m.MemberVersionId and m.MemberTypeId = 1
AND a.MemberVersionId = c.MemberVersionId and c.MemberTypeId = 2
try this,
SELECT ProjectId, Title, cmanager.EmployeeId AS Manager, ccon.EmployeeId AS
Contact, StatusId
from [MySchema].[ProjectData] b
inner join [MySchema].[Project] a on b.ProjectDataId=a.ProjectDataId
left join [MySchema].[Members] cmanager on cmanager.MemberVersionId =
a.MemberVersionId and cmanager.MemberTypeId=1
left join [MySchema].[Members] ccon on ccon.MemberVersionId =
a.MemberVersionId and ccon.MemberTypeId=2
The simplest solution to your problem would be introducing additional field to Project table. You'd either call it LatestMemberVersion (int, holds the currently highest MemberVersionId), which would by the most up to date version of the relationship, your you can add even simpler IsLatestMemberVersion (bit, holds 1 if the record is the latest/active). You can compute both of them using ROW_NUMBER() OVER statement.
Then, the query would change to:
SELECT ProjectId, Title, EmployeeId AS Manager, EmployeeId AS Contact, StatusId
FROM [MySchema].[Project] a,
[MySchema].[ProjectData] b ON a.ProjectDataId = b.ProjectDataId
[MySchema].[Members] c ON a.MemberVersionId = c.MemberVersionId
WHERE
a.[IsLatestMemberVersion] = 1 -- alternative is a.[LatestMemberVersion] = a.[MemberVersionId]
Additionally, there are two more things you can try:
you might want to borrow ideas from data warehousing, namely you will want to have combination of Slowly Changing Dimension Type 1 and 2
you can try to use SQL Server features, such as Change Data Tracking. But I have no experience with that, so it's possible it'll lead to nowhere.
And one last piece of advice, if you can, never write join conditions into the WHERE clause. It is not readable and can lead to problems when you suddenly change JOIN to LEFT JOIN. Microsoft itself recommends using ON instead of WHERE when applicable.
Example:
Table Question_Answers:
+------+--------+
| q_id | ans_id |
+------+--------+
| 1 | 2 |
| 1 | 4 |
| 2 | 1 |
| 3 | 1 |
| 3 | 2 |
| 3 | 3 |
+------+--------+
User_Submited_Answers:
| q_id | sub_ans_id |
+------+------------+
| 1 | 2 |
| 1 | 4 |
| 2 | 1 |
| 3 | 1 |
| 3 | 2 |
| 3 | 4 |
+------+------------+
I need a T-SQL query if this rows matches count 1 else 0
SELECT
t1.q_id,
CASE WHEN COUNT(t2.sub_ans_id) = COUNT(*)
THEN 1
ELSE 0 END AS is_correct
FROM Question_Answers t1
LEFT JOIN User_Submited_Answers t2
ON t1.q_id = t2.q_id AND
t1.ans_id = t2.sub_ans_id
GROUP BY t1.q_id
Try the following code:
select qa.q_id,case when qa.ans_id=sqa.ans_id then 1 else 0 end as result from questionans qa
left join subquestionans sqa
on qa.q_id=sqa.q_id and qa.ans_id=sqa.ans_id
This should give you expected result for every question.
select q_id, min(Is_Correct)Is_Correct from (
select Q.q_id,case when count(A.sub_ans_id)=count(*) then 1 else 0 end as Is_Correct
from #Q Q left join #A A on Q.q_id=A.q_id and Q.ans_id=A.sub_ans_id
group by Q.q_id
UNION ALL
select A.q_id,case when count(Q.ans_id)=count(*) then 1 else 0 end as Is_Correct
from #Q Q right join #A A on Q.q_id=A.q_id and Q.ans_id=A.sub_ans_id
group by A.q_id ) I group by q_id
MySQL solution (sql fiddle):
SELECT tmp.q_id, MIN(c) as correct
FROM (
SELECT qa.q_id, IF(qa.q_id = usa.q_id, 1, 0) as c
FROM question_answers qa
LEFT JOIN user_submited_answers usa
ON qa.q_id = usa.q_id AND qa.ans_id = usa.sub_ans_id
UNION
SELECT usa.q_id, IF(qa.q_id = usa.q_id, 1, 0) as c
FROM question_answers qa
RIGHT JOIN user_submited_answers usa
ON qa.q_id = usa.q_id AND qa.ans_id = usa.sub_ans_id
) tmp
GROUP BY tmp.q_id;
Now, step by step explanation:
In order to get the right output we will need to:
extract from question_answers table the answers which were not filled in by the user (in your example: q_id = 3 with ans_id = 3)
extract from user_submited_answers table the wrong answers which were filled in by the user (in your example: q_id = 3 with sub_ans_id = 4)
To do that we can use a full outer join (for mysql left join + right join):
SELECT *
FROM question_answers qa
LEFT JOIN user_submited_answers usa
ON qa.q_id = usa.q_id AND qa.ans_id = usa.sub_ans_id
UNION
SELECT *
FROM question_answers qa
RIGHT JOIN user_submited_answers usa
ON qa.q_id = usa.q_id AND qa.ans_id = usa.sub_ans_id;
From the previous query results, the rows which we are looking for (wrong answers) contains NULL values (based on the case, in question_answers table or user_submited_answers table).
The next step is to mark those rows with 0 (wrong answer) using an IF or CASE statement: IF(qa.q_id = usa.q_id, 1, 0).
To get the final output we need to group by q_id and look for 0 values in the grouped rows. If there is at least one 0, the answer for that question is wrong and it should be marked as that.
Check sql fiddle: SQL Fiddle
I have Question_Data table as below:
------------------------------
QuestionID | Attempts | Wrong
------------------------------
1 | 20 | 7
2 | 1 | 4
3 | 14 | 2
4 | 30 | 5
When a request is received, I process it and it results in a table called, "Responses Table":
(Sample Responses Table)
---------------------
QuestionID | Response
---------------------
1 | T
2 | F
3 | F
4 | F
5 | T
Now what i want is that i want to update "Question_Data" table on the basis of "Responses" table as:
New "Question_Data" table:
------------------------------
QuestionID | Attempts | Wrong
------------------------------
1 | 21 | 7
2 | 2 | 5
3 | 15 | 3
4 | 31 | 6
5 | 1 | 0
I checked QuestionID in "Question_Data" table and if it exists in "Question_Data" table I incremented it "Attempts" and if response is "F" increment "Wrong".
But if QuestionID is not present in "Question_Data" table. Insert a new row with same QuestionID and increment its "Attempts" to 1 and if response is "T" set its wrong to 0.
I am new to SQL. Any help will be appreciated.
UPDATE Q
SET Q.Attempts = Q.Attempts + 1 ,
Q.Wrong = Q.Wrong + ( CASE WHEN R.Response = 'F' THEN 1
ELSE 0
END )
FROM Question_Data Q
INNER JOIN Responses_Table R ON Q.QuestionID = R.QuestionID
After update if data is not present in Question_Data run this query
INSERT INTO Question_Data
(QuestionID ,
Attempts ,
Wrong)
SELECT
R.QuestionID ,
1,
(CASE WHEN R.Response = 'F' THEN 1
ELSE 0
END) Wrong
FROM
Responses_Table R
LEFT JOIN
Question_Data Q ON Q.QuestionID = R.QuestionID
WHERE
Q.QuestionID IS NULL
Assuming that the QuestionID is unique in both the Questions_Data and Responses table, you could use the update-join syntax:
UPDATE qd
SET Attempts = Attempts + 1,
Wrong = Wrong + CASE Response WHEN 'F' THEN 1 ELSE 0 END
FROM Questions_Data qd
JOIN Reponse r ON qd.QuestionID = r.QuestionID
I'm trying to generate the correct SQL for a project.
Here is a sample dataset:
DateTime | EmpID | Function | Location
--------------------------------------------------
1/23/2015 2:00PM | 123 | 1 | 1
1/23/2015 2:10PM | 123 | 2 | 1
1/23/2015 2:20PM | 123 | 1 | 2
1/23/2015 2:40PM | 123 | 2 | 2
1/24/2015 2:00PM | 321 | 1 | 2
1/24/2015 2:15PM | 321 | 2 | 2
1/24/2015 2:30PM | 321 | 1 | 3
I need to pull a count of all records where functionid = 1 and location MUST EQUAL both 1 and 2. So the first row and the third row would be returned and considered a count of 1.
Hopefully I'm making sense with this. Basically I need to know how many times an employee was at two locations. Any help would be appreciated.
Group by EmpId and count locations.
SELECT *
FROM MyTable T1
WHERE Function = 1 AND
NOT EXISTS (SELECT 1
FROM MyTable T2
WHERE T1.EmpId = T2.EmpId AND
T1.Function = T2.Function AND
T2.Location NOT IN (1, 2))
GROUP BY EmpId
HAVING Count(DISTINCT Location) > 1
Have not tested it but think this will work
SELECT EmpID, COUNT(EmpID) AS NumOfTimes
From [Table Name]
WHERE FunctionID = 1 AND (Location = 1 OR Location = 2)
GROUP BY EmpID
HAVING NumOfTimes = 2
SELECT EmpID , COUNT(*) total, COUNT (CASE WHEN Location = 1 THEN 1 END) was_in_1,COUNT (CASE WHEN Location = 2 THEN 1 END) was_in_2
FROM table
WHERE Function = 1
GROUP BY EmpID
HAVING MAX(CASE WHEN Location = 1 THEN 1 ELSE 0 END) = MAX(CASE WHEN Location = 2 THEN 1 ELSE 0 END)
but if you would like to know if the employee was in any 2 locations then jarlh gave the right comment
group by EmpID
having count(distinct location) >= 2
SELECT A.EmpID, COUNT(*)
FROM YOURTABLENAME A
INNER JOIN YOURTABLENAME B
ON A.EmpID= B.EmpID
WHERE A.Location = 1 and B.Location = 2
and A.Function = B.Function and A.Function = 1
GROUP BY A.EmpID