I have a database ready using PostgreSQL and I am using LoopBack 4.
I created the models through the LB4 discover but the relationships are not reported, is it possible to do it?
Related
I am working on a smaller project. I have two tables e.g. properties and agents. One property can have many agents. How can I update data in both tables using one query?
Here is the link to update data in postgres How I can update one to many relation in Postgres?
Supabase uses postgrest under the hood for the RESTful api, currently the suggested solution there is to write an rpc() function and call that.
Alternatively, since Supabase is just PostgreSQL, you always have the option of connecting directly using any postgres client and using the postgres solution you mentioned in your question.
Hello I am trying to build an application using Oracle ADF.
I have designed my database using Oracle Workbench have all the tables in the database already linked.( be it one to many or one to one mapping with the primary and foreignm keys.) i hope to include triggers too.
My problem is when i do all these links in workbench.
Will it automatically link the tables up using Association when i I load the tables as entities.
Will it also create views and view links too for me.
Or i should just create the tables in the database and do the associations and links in jdeveloper instead when i start working on the UI of my project.
If you use New - Business Tier - ADF Business Components - Business Components from Tables and go through the wizard pointint your tables in the database, JDeveloper should create Entities, link them with Associations, also create View Objects and link them with View Links based on your tables' foreign keys.
Triggers won't be reflected in the application.
I am learning about JDBC. When I am learning about it, I have come to known we can use 4 drivers. In each of these architecture I find the vendor database libraries in jdbc-odbc bridge driver and also native API calls in other type 3, 4.
I am unable to know about those concepts in the architecture.
So I request anyone to say about those two concepts which deals with the JDBC drivers.
I have referred the below link :
http://www.javatpoint.com/jdbc-driver
Vendor based database libraries means you need to use libraries provided by vendors to connect to database.
For example
You need to use ojdbc6.jar for Oracle , postgresql-9.4.1207.jar for postgresql etc.
Short answer: database is called a vendor database if you interact with it through JDBC using special drivers.
JDBC is an API, which allows you to work with different databases (such as MySQL, PostgreSQL etc.) using the same methods to query and update data in a database. This happens by using special drivers, which are unique for every database. In this case the database you are working with is called a vendor database.
I need to connect mysql and oracle at same time for a database related application. From the document I learned that in go the database drivers are initialized in "init()" function. So I want to know if I import 2 different database drivers, does the later driver will override the former one?
There's no problem importing both because the drivers use different names. The driver name is the first argument to sql.Open.
If they should happen to use the same name, then the driver registration function panics.
I have a store built with Opencart. Now I decided to use Laravel's Eloquent ORM to speed up further modifications. But the problem is that Opencart already has database connection (using mysql PDO driver) and I don't want to create new connection with Laravel as I want to keep performance as high as possible, and multiple db connections could be expensive.
So can I use already created PDO instance in Laravel Eloquent ORM?