Difference between revisions of "Relational Algebra"
From Wiki Notes @ WuJiewen.com, by Jiewen Wu
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| − | SQL, a popular relational query language, is declarative in that its queries declare what information the answer should contain instead of how to | + | SQL, a popular relational query language, is declarative in that its queries declare what information the answer should contain instead of how to compute it, as opposed to the conventional programming languages, which are procedural. |
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| + | DBMS normally translates SQL queries into an intermediate language, the relational algebra, before they are optimized. | ||
Revision as of 12:26, 24 January 2009
SQL, a popular relational query language, is declarative in that its queries declare what information the answer should contain instead of how to compute it, as opposed to the conventional programming languages, which are procedural.
DBMS normally translates SQL queries into an intermediate language, the relational algebra, before they are optimized.
