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Can multiple websites use the same database?
They can quite happily use the same database. Depending on the RDBMS you are using, you may want to create an additional Database or user instance for each site. With SQL Server you can create an additional database, or you can add a schema for each site.
How do I use two WordPress sites on the same database?
You can run two sites from a single database but not from the same set of database tables as the stored data includes the site’s domain name. There are two values in the options table: siteurl and home which are used. Using the same options table won’t work, even if you update options forcefully for each php run.
Is it better to share one database with multiple applications?
Side effects can be traced much easier, too. Edit: I’d like to point out, though, that as @Saeed mentioned, if you can encapsulate data manipulations in a service which is commonly available, then it’s easier to share one database with multiple applications. As long as you don’t need raw access that is a very good approach.
What are the disadvantages of sharing one database?
Sharing one database for amongst multiple applications has some serious disadvantages: The more applications use the same database, the more likely it is that you hit performance bottlenecks and that you can’t easily scale the load as desired. SQL Databases don’t really scale.
Which is better one database or one database?
If your database functions just as a data repository without application logic such as triggers or business package code, it would be better to have a single database and encapsulate business level functionality to services that use the database for all their actions.
Can a schema and a database run on the same server?
Yes I have worked in a similar environment. The difference between a schema and a database isn’t a huge one from an application perspective. After all, all the databases on a server run on the same server. I wouldn’t sweat it.