Chapter 3
Queries in SQL
3.1 What Is SQL?
SQL is an acronym that stands for Structured Query Language. SQL is an international standard, and all fully relational database management systems include it. Using SQL, it is possible to create a database, enter data into it, and retrieve information from it. Any information that can be retrieved from a database can be retrieved by means of an SQL query.
Most database management systems also have a graphical user interface (GUI). Using this GUI, it's possible to create a database and enter data into a database. Using a feature known as query by example (QBE), it is possible to retrieve information from a database. A query language like SQL is a more powerful and flexible means of querying a database, ...
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