Exists operator - PowerPoint PPT Presentation

Data Manipulation in SQL

Data Manipulation in SQL. ã Department of Computer Science Northern Illinois University February 2001. Introduction to SQL. Relational DBMSs do NOT always behave exactly as the relational database theory specifies Only relational constructs are visible to users at the external level

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Structured Query Language

Structured Query Language. Agenda: - SQL commands for DB definition - SQL DML commands - VIEWS and security control using SQL. CREATE TABLE command. - Table name - Description of the attributes: -- Attribute name -- Data type

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538 views • 40 slides

Joins and Sub-queries in SQL

Joins and Sub-queries in SQL. Processing Multiple Tables: Joins. Join – a relational operation that causes two or more tables with a common domain to be combined into a single table or view

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926 views • 16 slides

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