Creating relationship links in PostgreSQL via pgAdmin - postgresql

I created a databse with four tables in pgAdmin. It was coded in PostgreSQL.
I was wondering how do you create replationship links in pgAdmin? I've searched google and youtube, but can't seem to find a tutorial on it.
If someone can explain how to do this, i'll be grateful.
Here's a picture of how I designed my datase to relate:

You can find it via right-click on the table --> Properties --> Constraints --> Foreign Key (Add).
Then you can add the foreign keys as needed. There is (yet) no way to do it graphically.

Related

How to access the Check Dialog in pgAdmin 4?

I'm using pgAdmin 4 and have used the ERD tool to create all tables, relationships and constraints so far.
I'm trying to add a check constraint via the dialogs (https://www.pgadmin.org/docs/pgadmin4/development/check_dialog.html) but don't seem to be able to.
I'm using the pgerd file to generate the SQL required to generate my tables, which is why I'd like to keep everything in that file.
This question How to Add a Check Constraint in a Table in pgadmin 4? seems to show different options to what I see.
(I don't have the check option with the constraints tab)
Can anyone advise or point me in the right direction?
It appears you are not able to access the check dialog options when using the pgAdmin 4 erd tool
If you are not using the erd tool, you can access the check dialog options tab as stated by kashyap-neeraj in their answer
How to Add a Check Constraint in a Table in pgadmin 4?
(right click the table in the pgAdmin browser (the left column) and select properties)

How do I set the schema for Azure Mobile App tables?

Currently tables get created in the "dbo" schema, but I would like to set it to something different. Is this possible?
Currently tables get created in the "dbo" schema, but I would like to set it to something different. Is this possible?
For Node.js backend, you could add an app setting name MS_TableSchema with the value as your custom schema. You could log into Azure Portal and choose your app service, then click "All Settings > Application Settings", add the above setting under the App settings section. After created your new table via the Add button under "MOBILE > Easy tables" on Azure Portal, the new schema would be applied. For the existing table with the old schema, you may also need to alter your table with the newer schema. Moreover, you need to make sure your custom schema exists. Details you could follow this similar issue. Also, you could follow the Defining a Table section under TABLE CONTROLLER BASICS, and the Alternative Schema section under LINKING EXISTING TABLES.
For C# backend, you could follow adrian hall's book about Changing the Mobile Schema.

Not able to view grid lines in MySQL Workbench

I'm trying to create a schema, but in Workbench when I add a diagram it shows nothing. I've tried adding tables and nothing shows up. I'm not sure what I'm missing here. Does anyone know why this is occurring?
Diagraming is part of modeling, so it will not affect your live database. Either use modeling then forward-engineer the model/diagram, or simply edit the database/schema with Workbench (and don't use modeling). The latter is simpler and more straight-forward.
Consider the FAQ entry titled How do I create a MySQL database (schema) in MySQL Workbench?
Or if you're goal here is to use modeling, then consider the tutorial titled Creating a Model; and it also shows the forward-engineering procedure.

Is there any way to create diagram for localdb?

I have created a database using Entity Framework code first approach, and now I am trying to verify the relations of data tables but unfortunately after wasting 2 days still unable to get any solution.
According to this article the following query solves the problem.
alter authorization on database::[your-db-name-no-quotes] to sa
I tried it and it worked for me.
You might try to use Entity Framework Power Tools that is a Visual Studio add-in that was used to create the data model diagrams shown in these tutorials. The tools can also do other function such as generate entity classes based on the tables in an existing database so that you can use the database with Code First. After you install the tools, some additional options appear in context menus. For example, when you right-click your context class in Solution Explorer, you get an option to generate a diagram. When you're using Code First you can't change the data model in the diagram, but you can move things around to make it easier to understand.
There is a possibility to create a diagram from an existing database. You could use SQL Server Management Studio Express diagram generator. Right-click in diagrams folder in the database and choose create a new diagram.
Please also refer to this answer: Generate table relationship diagram from existing schema (SQL Server)

Is there an easy way to create a database diagram in SQL Server

I'm not sure if I have worded this question properly I will explain what I am trying to acheieve further.
I am looking to create a graphical representation of an existing database showing table relationships Key relationships etc.
I have seen posts around the internet that suggest you can just go; New > Database Diagram. But I have seen nothing to this effect in Management Studio
Something similar to this:
You first need to install the Diagram Support objects. Then you all you expand the database out and right click the Database Diagram folder
If there is an database diagram drawn for the database it should be visible if you collapse DataBase Diagrams under your database. If you are trying to create one that is the way to go about it create new database diagram.