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SQL: Queries, Programming, Triggers

SQL: Queries, Programming, Triggers. Chapter 5. We now introduce SQL, the standard query language for relational DBS. Like relational algebra, an SQL query takes one or two input tables and returns one output table. Any RA query can also be formulated in SQL.

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Overview of Query Evaluation

Overview of Query Evaluation. Chapter 12. Overview of Query Evaluation. Plan : Tree of R.A. ops, with choice of alg for each op. Each operator typically implemented using a `pull’ interface: when an operator is `pulled’ for the next output tuples, it `pulls’ on its inputs and computes them.

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350 views • 21 slides

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