Real-World Performance Training - oracle.com
Real-World Performance Training SQL Introduction Real-World Performance Team Copyright 2014, oracle and/or its affiliates. All rights reserved. |. SQL. Basics SQL. Structured Query Language Declarative You express what you want to do, not how to do it Despite the name, provides ability to modify (create, update, delete) data too Copyright 2014, oracle and/or its affiliates. All rights reserved. |. SQL. Basic Anatomy of a SQL Statement select dname, job, avg(sal), max(sal), count(*) Select list from emp e join dept d Tables on = Table Aliases where job != 'CLERK'. group by dname, job Join having avg(sal) > 1500. order by dname, avg(sal) Predicate Aggregation Having Sorting Copyright 2014, oracle and/or its affiliates.
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