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Chapter 6. Databases > A Language for Databases

6.2. A Language for Databases

For humans and databases to work together, they must speak a common language. Although in principle, every database manufacturer could define its own such language, doing so would cause problems for both users and database vendors. To avoid these problems, a standard called Structured Query Language (SQL, pronounced “sequel”) that all database vendors support, although frequently with some enhancements specific to their products, has been defined.

Most databases provide a utility program that allows users to enter SQL commands interactively and get results back. That program for hsqldb’s can be accessed by running the following:


  

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