How do I grab values out of different tables with my only reference being the foreign key?

Question

0.00/5 (No votes)

See more:

Hey!

I want to say sorry right now because this question might become a little bit of a mess, english isn't my native language and I'm not used to formulating longer text's like this.

Alright, let's say I have 5 tables

Table 1

PKTable1 | FKTable3 | Quantity | Position

Table 2

PKTable2 | Date | Status | FKTable4

Table 3

PKTable3 | ArticleName | Price

Table 4

PKTable4| Name | FirstName

Table 5

PKTable5 | FKTable1 | FKTable2

Can I somehow fetch for example Name and FirstName from Table4 only using Table5?

I'm using C#, LinQ and EntityFramework if that helps

What I have tried:

This is more of a 'is this possible' question, rather than one directly related to code so I've nothing to show here sadly.

Posted 19-Apr-18 21:51pm

Member 13783935

Updated 19-Apr-18 22:03pm

Add a Solution

Comments

F-ES Sitecore 20-Apr-18 4:02am

Not using only table5, you'll need table5 joined to table2 which is then joined to table4. Google how you join tables in entity framework as there are different ways depending on what coding style you use.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2018-04-19T22:04:00

Solution 1

Yes:

SQL

SELECT t4.Name, t4.FirstName FROM Table5 t5
JOIN Table2 t2 ON t5.FKTable2 = t2.PKTable2
JOIN Table4 t4 ON t4.PKTable4 = t2.FKTable4

Try it in SSMS and you'll see what it does.
Have a look at JOIN for an explanation: SQL Joins[^]

Posted 19-Apr-18 22:04pm

OriginalGriff