'Nested queries' diaporamas de présentation

Chapter 5

More SQL: Complex Queries, Triggers, Views, and Schema Modification. Chapter 5. Chapter 5 Outline. More Complex SQL Retrieval Queries Specifying Additional Constraints and Actions in SQL CREATE ASSERTION CREATE TRIGGER Views (virtual tables) in SQL CREATE VIEW Schema Modification in SQL

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SQL (Chapter 2: Simple queries; Chapter 7 and 8: Nested and DML queries)

SQL (Chapter 2: Simple queries; Chapter 7 and 8: Nested and DML queries). Many of the examples in this document are based on the tables in the next slide. These are similar to the tables in the test database CS451 Supplier.

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Bank Schema

Bank Schema. branch (B ranchName , BranchCity, assets) customer (C ustomerName , CustomerStreet, CustomerCity) account (A ccountNumber , BranchName, balance) loan (L oanNumber , BranchName, amount) depositor (C ustomerName, AccountNumber ) borrower (C ustomerName, LoanNumber ). Where clause.

636 views • 63 slides

Chapter 5

More SQL: Complex Queries, Triggers, Views, and Schema Modification. Chapter 5. Chapter 5 Outline. More Complex SQL Retrieval Queries Specifying Additional Constraints and Actions in SQL CREATE ASSERTION CREATE TRIGGER Views (virtual tables) in SQL CREATE VIEW Schema Modification in SQL

630 views • 51 slides

Optimizing Nested Queries with Parameter Sort Orders

Optimizing Nested Queries with Parameter Sort Orders. Appeared in the 31 st VLDB Conference 2005 Ravindra N. Guravannavar Ramanujam H.S. S. Sudarshan Indian Institute of Technology Bombay. Nested Queries are Important. Commonly encountered in practice

592 views • 46 slides

Optimizing Nested Queries with Parameter Sort Orders

Optimizing Nested Queries with Parameter Sort Orders. Appeared in the 31 st VLDB Conference 2005 Ravindra N. Guravannavar Ramanujam H.S. S. Sudarshan Indian Institute of Technology Bombay. Nested Queries are Important. Commonly encountered in practice

581 views • 46 slides

Structured Query Language (2)

Structured Query Language (2). The main reference of this presentation is the textbook and PPT from : Elmasri & Navathe, Fundamental of Database Systems, 4 th edition, 2004, Chapter 8

534 views • 43 slides

Approximate Queries on Very Large Data

Approximate Queries on Very Large Data. Sameer Agarwal. Joint work with Ariel Kleiner , Henry Milner, Barzan Mozafari , Ameet Talwalkar , Michael Jordan, Samuel Madden, Ion Stoica. UC Berkeley. Our Goal. Support interactive SQL-like aggregate queries over massive sets of data.

582 views • 40 slides

Chapter 5 More SQL: Complex Queries, Triggers, Views, and Schema Modification

Chapter 5 More SQL: Complex Queries, Triggers, Views, and Schema Modification. Chapter 5 Outline. More Complex SQL Retrieval Queries Specifying Constraints as Assertions and Actions as Triggers Views (Virtual Tables) in SQL Schema Change Statements in SQL. More Complex SQL Retrieval Queries.

588 views • 39 slides

Optimizing Nested Queries with Parameter Sort Orders

Optimizing Nested Queries with Parameter Sort Orders. Ravindra N. Guravannavar Ramanujam H.S. S. Sudarshan Indian Institute of Technology Bombay. Nested Queries. Commonly encountered in practice Queries having performance issues are often complex nested queries

496 views • 35 slides

Announcements

Announcements. Written Homework 1 due Friday If you have fourth edition make sure you do the right problems Program 3 out today, due next Friday Nov 10 Today Finish up Chapter 8 Reading Skim Chapters 9 & 26 Chapter 10. From Last Time.

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More SQL: Complex Queries,

More SQL: Complex Queries,. Outline. More Complex SQL Retrieval Queries. More Complex SQL Retrieval Queries. Additional features allow users to specify more complex retrievals from database: Nested queries, joined tables, outer joins, aggregate functions, and grouping.

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Chapter 5 More SQL: Complex Queries, Triggers, Views, and Schema Modification

Chapter 5 More SQL: Complex Queries, Triggers, Views, and Schema Modification. Chapter 5 Outline. More Complex SQL Retrieval Queries Specifying Constraints as Assertions and Actions as Triggers Views (Virtual Tables) in SQL Schema Change Statements in SQL. More Complex SQL Retrieval Queries.

290 views • 27 slides

SQL

SQL. Relational Algebra. Select : ? <condition>(<relation>) Project: ? <attribute-list> (<relation>) Set Operators: union compatible union, difference Cross product ( R ? S : names must be diff) Join (theta): only conjunctions in condition Equi-join: all equalities

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CSE 103

CSE 103. Students: Review INNER and OUTER JOINs, Subqueries. Others: Please save your work and log out by 10:10. Day 12 Review. What kinds of questions can we solve with subqueries we couldn't otherwise? What kinds of questions can we solve with self-JOINs?

141 views • 14 slides

SQL Nested Queries

SQL Nested Queries. Jeffrey P. Landry University of South Alabama. Nested Query-Defined. A nested query is a query within a query A complete SELECT statement embedded within another SELECT statement Nested queries are also called subqueries. Query Results.

1.44k views • 10 slides