'Select distinct target list' presentation slideshows

CIS 550, Fall 2001 Handout 2.

CIS 550, Fall 2001 Handout 2. SQL, Relational Calculus and Datalog. What we cannot compute with RA. Recursive queries . Given a relation Parent(Parent, Child) compute the Ancestor relation. (Can do this in Datalog.)

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Advanced SQL Queries

Advanced SQL Queries. Example Tables Used. Rewriting Minus Queries. Name and id of sailors that has reserved at least one red boat and has never reserved green boat. SELECT S.sname, S.sid FROM Sailors S, Boats B, Reserves R WHERE S.sid = R.sid and R.bid = B.bid

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Database Systems I SQL Queries

Database Systems I SQL Queries. Introduction. We now introduce SQL, the standard query language for relational DBS. As RA, an SQL query takes one or two input tables and returns one output table. Any RA query can also be formulated in SQL, but in a more user-friendly manner.

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SQL: Queries, Constraints, Triggers

SQL: Queries, Constraints, Triggers. Chapter 5. SQL. Data Manipulation Language (DML): subset of SQL which allows users to create queries and to insert , delete and modify rows .

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More on SQL

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Introduction to SQL and the Relational Model

Introduction to SQL and the Relational Model. Data Boot Camp! May 20, 2014 Michael Cafarella. Relational Databases. The most common kind is a relational database The software is called a Relational Database Management System (RDBMS)

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(Book Ch 5 )

CS 186: Introduction to Database Systems Topic 7 SQL : The Query Language ( Part 1). (Book Ch 5 ). Michael Franklin Fall 2013. Relational Query Languages. A major strength of the relational model: supports simple, powerful querying of data. Two sublanguages:

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Lecture 11: Basic SQL, Integrity constraints

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Lecture 11: Basic SQL, Integrity constraints

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SQL: The Query Language

SQL: The Query Language. R1. Example Instances. S1. We will use these instances of the Sailors and Reserves relations in our examples. S2. SELECT [DISTINCT] target-list FROM relation-list WHERE qualification. Basic SQL Query.

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