Select with SQL the "Provedors->NomP" that are the only ones associated with any value in "Enviaments->IdA"
The database is a way to store the data in tabular form as we can access them easily. To make a database we use some tools like MSACCESS, SQL, MYSQL, ORACLE, ECT. They are using their own languages to manipulate the data.
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fromChapter 11 / Lesson 12
In this lesson, we'll be looking at databases, which are computer mechanisms for storing and retrieving data. Test your knowledge following the lesson with a quiz.