SQL JOINS - 3 tables - sql

I have 3 tables, CASES, REPORTS and REPORT_DETAIL
My current report shoes all REPORTS where there is a matching CASE. This is accomplished by
SELECT * FROM CASES
JOIN REPORTS
WHERE CASES.ID = REPORTS.ID
I am looking to extend this to now show additional report detail if it is available. So show the same report, but if there is any report detail available, then tag that on the end. I have tried a series of LEFT and RIGHT JOINS but am not getting the required dataset.
Could it be that I need to to the RIGHT JOIN once the rest of the SQL has run, and that the SQL is getting confused with where the JOIN should be?
I have tried the following but have not managed to get it to work.
SELECT * FROM CASES
JOIN REPORTS ON CASES.ID = REPORTS.ID
RIGHT JOIN REPORT_DETAIL ON REPORTS.DETAILID = REPORT_DETAIL.DETAILID

I think you want LEFT JOIN:
SELECT *
FROM CASES C JOIN
REPORTS R
ON C.ID = R.ID LEFT JOIN
REPORT_DETAIL RD
ON R.DETAILID = RD.DETAILID;
This keeps all rows returned by the first JOIN, along with additional columns from any matching REPORT_DETAIL records.

Related

SQL Statement for Accessing Data from Multiple Tables

I have 7 Tables as per attached following Image.
I will either enter Engine Number or Chassis Number and it should show the respective tables information (these tables have only mentioned fields) so all fields can be shown as result.
I can use hard coded Engine Number or Chassis Number. Every time of execution of this Query, I will hard code the required Engine/Chassis Number and will get the result.
Can anybody please help me to write this query for me?
Click Here to See the Tables
This might be a starting point for your solution.
SELECT prod.EngineNo AS engNo, prod.ChassisNo, doral.doralNo [, table.column [AS name]]
FROM DOProductSpecsDetais AS prod
INNER JOIN DORAL AS doral
ON prod.DOProductSpecsDetailID = doral.DOProductSpecsID
INNER JOIN DOProductDetail AS prodDetail
ON prod.DOProductDetailID = prodDetail.DOProductDetailID
WHERE prod.ChassisNo = '<input>' OR prod.EngineNo='<input>'
Between the SELECT and the FROM Statement, you can select any column out of your JOIN.
You can cascade as many JOINs as you like...
Which DBMS are you going to use?
One suggestion: Try to simplify the names of your columns, if possible.
One more: If you just started to do Database things, it is always helpful to start a test environment and use a client tool.
You can write query something like this:
select * from
DoProductSpecsDetail tbl1 inner join Doral tbl2
on tbl1.DoProductSpecsDetailId = tbl2.DoProductSpecsId
inner join DoproductDetail tbl3
on tbl1.DoProductDetailId = tbl3.DoProductDetailId
inner join ProductColor tbl4
on tbl1.ProductColorId = tbl4.ProductColorId
inner join DoDetail tbl5
on tbl3.DeliveryOrderDetailId = tbl5.DeliveryOrderId
inner join ProductMain tbl6
on tbl3.ProductId = tbl6.ProductId
inner join BPMain tbl7
on tbl5.BusinessPartnerId = tbl7.BusinessPartnerId

Bundle 2 tables in 1 Inner Join

I have the sql code below. It works but when I run the query, it repeats the data more than one time. I believe it has something to do with the Inner Join. Since it is Inner Joining twice the data is repeating twice in the report. Any help is appreciated
SELECT NewRelative.FullName, GiftGave.EventName, GiftGave.EventDate, GiftGave.AmountGiven, GiftGave.Notes, GiftRcvd.EventName
FROM (NewRelative INNER JOIN GiftGave ON NewRelative.FullName = GiftGave.FullName) INNER JOIN GiftRcvd ON NewRelative.FullName = GiftRcvd.FullName
WHERE (((NewRelative.FullName)=[forms]![FormRelativeReport]![TxtPickRelative]));

Nested SQL Joins in MS Access 2013

I normalized my data and have been trying to display data across multiple tables. I'm fairly new to SQL, so please bear with me.
What I'm trying to do is display tasks that haven't been assigned to a project yet, but contain data from various tables such as project title, company, etc (Using a LEFT JOIN and a WHERE clause).
The original code which works:
SELECT Tasks.ID, Projects_Tasks.ProjectID
FROM Tasks LEFT JOIN Projects_Tasks ON Projects_Tasks.TaskID = Tasks.ID
WHERE Projects_Tasks.ProjectID IS NULL;
The nested joins code (that doesn't work):
SELECT Tasks.ID, Projects.ProjectTitle, ProjectManagers.FirstName, ProjectManagers.LastName, Companies.Company
FROM ((((Tasks
LEFT JOIN Projects_Tasks ON Projects_Tasks.TaskID = Tasks.ID)
INNER JOIN Projects_Tasks ON Projects_Tasks.ID = Projects.ID)
INNER JOIN Projects ON Projects.ID = Projects_Tasks.ProjectID)
INNER JOIN ProjectManagers ON ProjectManagers.ID = Projects.ProjectManagerID)
INNER JOIN Companies ON Companies.ID = ProjectManagers.CompanyID
WHERE Projects_Tasks.ProjectID IS NULL;
I've tried numerous combinations, but I just can't get it to work. I've tried reversing the order of my nested joins (in case it executes from bottom to top) and I've tri
I don't enjoy writing SQL statements.The good thing about Access though is it can make your SQL statements for you in Queries
Using Query Builder:
Select the tables Project_Tasks & Project_Managers & all other tables
you want to display data
Select all the relevant data fields you want to display
Where you have the 'ProjectID' field, the Criteria section needs to have "Is Null" (don't put the quotation marks though)
Then, save the query, and run it. (You can probably just use that query, or otherwise strip out the SQL statement)
Good luck!

Joining Two Queries onto a Shared Table

I have been struggling with the concept of combining results of two queries together via a join on a common table and I was hoping I could gain some assistance. The following is a rough guide to the tables:
dbo.Asset (not returned in the SELECT statement, used for joins only)
- dbo.Asset.AssetID
- dbo.Asset.CatalogueID
dbo.WorkOrder
- WorkOrderID
- AssetID
- WorkOrderNumber
dbo.WorkOrderSpare
- WorkOrderID
- WorkOrderSpareID
- WorkOrderSpareDescription
- ActualQuantity
- CreatedDateTime
dbo.Catalogue
- CatalogueID (PK)
- CatalogueNumber
- CatalogueDescription
- CatalogueGroupID
dbo.CatalogueGroup
- CatalogueGroupID
- CatalogueGroupNumber
First Query:
SELECT CatalogueGroup.CatalogueGroupName,
Catalogue.CatalogueNumber,
Catalogue.CatalogueDescription,
Catalogue.CatalogueID,
Asset.IsActive
FROM CatalogueGroup
INNER JOIN Catalogue
ON CatalogueGroup.CatalogueGroupID = Catalogue.CatalogueGroupID
INNER JOIN Asset
ON Catalogue.CatalogueID = Asset.CatalogueID
Second Query:
SELECT WorkOrder.WorkOrderNumber,
WorkOrderSpare.WorkOrderSpareDescription,
WorkOrderSpare.ActualQuantity,
WorkOrderSpare.CreatedDateTime
FROM WorkOrder
INNER JOIN WorkOrderSpare
ON WorkOrder.WorkOrderID = WorkOrderSpare.WorkOrderID
Now I can do the above easily enough in Access (WYSIWYG) by joining Asset/Catalogue/CatalogueGroup together and then joining Asset.AssetID onto WorkOrder.AssetID. I can't seem to get anything similar to work via raw code, I think I have my logic correct for the joins (INNER JOIN on the results of both) but then I am new to this.
Any assistance would be greatly appreciated, any pointers on where I can read further into problems like this would be great.
EDIT: This is what I was trying to use to no avail, I should also mention I am trying to do this in ms-sql, not Access (trying to move away from drag and drop):
SELECT CatalogueGroup.CatalogueGroupName,
Catalogue.CatalogueNumber,
Catalogue.CatalogueDescription,
Catalogue.CatalogueID,
Asset.IsActive,
WorkOrderSpare.WorkOrderSpareDescription,
WorkOrderSpare.ActualQuantity,
WorkOrderSpare.CreatedDateTime,
WorkOrder.WorkOrderNumber
FROM (((CatalogueGroup
INNER JOIN Catalogue
ON CatalogueGroup.CatalogueGroupID = Catalogue.CatalogueGroupID)
INNER JOIN Asset ON Catalogue.CatalogueID = Asset.CatalogueID)
INNER JOIN WorkOrderSpare
ON WorkOrder.WorkOrderID = WorkOrderSpare.WorkOrderID)
INNER JOIN WorkOrder ON Asset.AssetID = WorkOrder.AssetID
Think I see the issue. Assuming that the joins themselves are correct (ie your columns do relate to each other), the order of your joins is a little off - when you join WorkOrder to WorkOrderSpare, neither of those two tables relate back to any table you've identified up until that point in the query. Think of it as joining two tables separately from the chain of joins you have going so far - it's almost like doing two separate join queries. If you switch the last two it should work, that way WorkOrder will join to Asset (which you've already defined) and then you can join WorkOrderSpare to WorkOrder. I've also taken the liberty of removing parentheses on the joins, that's an Access thing.
SELECT CatalogueGroup.CatalogueGroupName,
Catalogue.CatalogueNumber,
Catalogue.CatalogueDescription,
Catalogue.CatalogueID,
Asset.IsActive,
WorkOrderSpare.WorkOrderSpareDescription,
WorkOrderSpare.ActualQuantity,
WorkOrderSpare.CreatedDateTime,
WorkOrder.WorkOrderNumber
FROM CatalogueGroup
INNER JOIN Catalogue ON CatalogueGroup.CatalogueGroupID = Catalogue.CatalogueGroupID
INNER JOIN Asset ON Catalogue.CatalogueID = Asset.CatalogueID
INNER JOIN WorkOrder ON Asset.AssetID = WorkOrder.AssetID
INNER JOIN WorkOrderSpare ON WorkOrder.WorkOrderID = WorkOrderSpare.WorkOrderID
I think you were close. As a slightly different approach to joining, try this:
SELECT CatalogueGroup.CatalogueGroupName,
Catalogue.CatalogueNumber,
Catalogue.CatalogueDescription,
Catalogue.CatalogueID,
Asset.IsActive,
WorkOrderSpare.WorkOrderSpareDescription,
WorkOrderSpare.ActualQuantity,
WorkOrderSpare.CreatedDateTime,
WorkOrder.WorkOrderNumber
FROM
CatalogueGroup, Catalogue, Asset, WorkOrder, WorkOrderSpare
WHERE CatalogueGroup.CatalogueGroupID = Catalogue.CatalogueGroupID
and Catalogue.CatalogueID = Asset.CatalogueID
and Asset.AssetID = WorkOrder.AssetID
and WorkOrder.WorkOrderID = WorkOrderSpare.WorkOrderID
It looks like it should work, but not having data, hard to know if simple joins all the way through is what you want. (It's a matter of personal preference whether to use the and clauses rather than the inner join syntax. While on style preferences, I like table aliases if supported, so FROM CatalogueGroup cg for example, so that you can refer to cg.CatalogueGroupID etc, rather than writing out the full table name every time.)
Ok. so the error that you noted in a comment
The multi-part identifier "WorkOrder.WorkOrderID" could not be bound
is usually when you have an alias for a table and instead of using alias in JOIN you use the table name or when you are using the wrong column name or table name.
Ideally in SQL server your query should look like this
SELECT
cg.CatalogueGroupName,
c.CatalogueNumber,
c.CatalogueDescription,
c.CatalogueID,
A.IsActive,
Wo.WorkOrderNumber,
WoS.WorkOrderSpareDescription,
WoS.ActualQuantity,
WoS.CreatedDateTime
FROM CatalogueGroup cg
INNER JOIN Catalogue c ON cg.CatalogueGroupID = c.CatalogueGroupID
INNER JOIN Asset A ON c.CatalogueID = A.CatalogueID
INNER JOIN WorkOrder Wo ON Wo.AssetID= A.AssetID
INNER JOIN WorkOrderSpare WoS ON Wo.WorkOrderID = WoS.WorkOrderID

Basic SQL join question. Can you help me improve my skillset?

Ok.. So I'm trying to improve my SQL skills and have a question. Here is a screen shot of the schema.
Schema http://img509.imageshack.us/img509/97/screenhunter02nov121946.gif
(http://img509.imageshack.us/img509/97/screenhunter02nov121946.gif)
Alright so I'm selecting a bunch of Report Bundles and other rows from a table you can see. I've got these two tables joining together correctly and displaying what should be returned. Now I need to add another field onto my result rows that states what type of report this is. How can I join up to the ReportGroupType table through the ReportBundleGroup table without getting a shwack of results?
Here is the query I am using so far.
SELECT *
FROM ReportBundleCustomerVisibility INNER JOIN ReportBundle
ON ReportBundleCustomerVisibility.ReportBundleID = ReportBundle.ID
WHERE ReportBundleCustomerVisibility.ReferenceCustomerID = 2303
Thanks again SO
SELECT *
FROM ReportBundleCustomerVisibility AS v
JOIN ReportBundle AS b ON b.ID = v.ReportBundleID
JOIN ReportBundleGroup AS g ON b.ID = g.ReportBundleID
JOIN ReportGroupTYpe AS t ON t.ID = g.ReportGroupTypeID
WHERE v.ReferenceCustomerID = 2303
It sounds like you just need another inner join to get the information you need. You can think about the second join as joining the result of the join with the ReportGroupType table. I added parenthesis to try to join the two sets the second INNER JOIN is operating on.
SELECT * FROM ((ReportBundleCustomerVisibility
INNER JOIN ReportBundle ON ReportBundleCustomerVisibility.ReportBundleID = ReportBundle.ID)
INNER JOIN ReportGroupType ON ReportBundleGroup.ReportGroupTypeID = ReportGroupType.ID)
WHERE ReportBundleCustomerVisibility.ReferenceCustomerID = 2303
I also highly suggest against using "SELECT *" in production code or any query you plan on reusing as the table schema can change and possibly effect reports and UI. Explicitly specify the columns instead.