'Conceptual evaluation strategy' presentation slideshows

Administrative

Administrative. Exam Oct 19, 2010 2:30pm in 3005 (usual room) No class on Oct 21 What topic to do for review? November 18 th away for conference. Database Systems I Week 5 SQL Queries. Introduction. We now introduce SQL, the standard query language for relational DBS.

703 views • 51 slides

861 views • 50 slides

SQL: Queries, Constraints, Triggers

SQL: Queries, Constraints, Triggers. Chapter 5. R1. Example Instances. S1. We will use these instances of the Sailors and Reserves relations in our examples. If the key for the Reserves relation contained only the attributes sid and bid , how would the semantics differ?. S2.

561 views • 47 slides

SQL: Queries, Programming, Triggers

SQL: Queries, Programming, Triggers. Chapter 5. Modified by Donghui Zhang. SELECT [DISTINCT] target-list FROM relation-list WHERE qualification. Basic SQL Query. relation-list A list of relation names (possibly with a range-variable after each name).

666 views • 42 slides

SQL: Queries, Programming, Triggers

SQL: Queries, Programming, Triggers. Chapter 5. Modified by Donghui Zhang. SELECT [DISTINCT] target-list FROM relation-list WHERE qualification. Basic SQL Query. relation-list A list of relation names (possibly with a range-variable after each name).

687 views • 42 slides

SQL: Queries, Programming, Triggers

SQL: Queries, Programming, Triggers. Chapter 5. Modified by Donghui Zhang. SELECT [DISTINCT] target-list FROM relation-list WHERE qualification. Basic SQL Query. relation-list A list of relation names (possibly with a range-variable after each name).

544 views • 42 slides

SQL: Structured Query Language

SQL: Structured Query Language. Chapter 5. SQL and Relational Calculus. Although relational algebra is useful in the analysis of query evaluation, SQL is actually based on a different query language: relational calculus There are two relational calculi: Tuple relational calculus (TRC)

842 views • 39 slides

SQL: Queries, Constraints, Triggers

SQL: Queries, Constraints, Triggers. Chapter 5. R1. Example Instances. S1. We will use these instances of the Sailors and Reserves relations in our examples. If the key for the Reserves relation contained only the attributes sid and bid , how would the semantics differ?. S2.

549 views • 35 slides

SQL: The Query Language Part 1

450 views • 32 slides

ICS 421 Spring 2010 Relational Algebra & SQL

ICS 421 Spring 2010 Relational Algebra & SQL. Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. Formal Relational Query Languages. Query languages : Allow manipulation and retrieval of data from a database .

276 views • 20 slides