'Select max salary' diaporamas de présentation

SQL Chapter 8

SQL Chapter 8. SQL or SEQUEL - (Structured English Query Language). Based on relational algebra Developed in 1970's released in early 1980's Standardized - SQL-92 (SQL2), SQL-3 current standard - SQL:1999 (SQL-99), future standard - SQL:2003 (aka SQL:200n)

1.01k views • 91 slides

Database Administration ISQA 436

Database Administration ISQA 436. SQL Review, Oracle Objects and Data Types, SQL*Plus. SQL. Structured Query Language Declaritive language vs. procedural Three types of SQL statements Data Manipulation Language (DML) SELECT, INSERT, UPDATE, DELETE Data Definition Language (DDL)

633 views • 54 slides

Value of Serializability

Value of Serializability. Settings: accounts ( number , branchnum, balance); create clustered index c on accounts(number); 100000 rows Cold buffer Isolation level (SERIALIZABLE or READ COMMITTED) SQL Server 7, DB2 v7.1 and Oracle 8i on Windows 2000

626 views • 52 slides

Structured Query Language - SQL 2

517 views • 51 slides

SQL

SQL. SQL (Structured Query Language) is used to define, query, and modify relational databases Every relational database system understands SQL SQL is standard: the same SQL statements can be executed without modifications on many database systems. History of SQL.

563 views • 45 slides

Chapter 15 Algorithms for Query Processing and Optimization

Chapter 15 Algorithms for Query Processing and Optimization. ICS 424 Advanced Database Systems Dr. Muhammad Shafique. Outline. Introduction Processing a query SQL queries and relational algebra Implementing basic query operations Heuristics-based query optimization

647 views • 35 slides

Oracle

Oracle. Table of contents What is a database? Fundamentals of database Table management Inserting data Updating data Deleting data Query management Simple queries Aggregate functions String manipulation Date manipulation Sub queries Equi join Outer join Self join

313 views • 27 slides

Practical Database Design and Tuning

Practical Database Design and Tuning. Outline. Practical Database Design and Tuning Physical Database Design in Relational Databases An Overview of Database Tuning in Relational Systems Reading: Physical Design: Chapter 16 [1]. Physical Database Design in Relational Databases.

267 views • 24 slides

Query Processing and Optimization

Query Processing and Optimization. Query Processing and Optimization. Query optimization : the process of choosing a suitable execution strategy for processing a query. Two internal representations of a query Query Tree Query Graph

282 views • 24 slides