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ICS 321 Spring 2011 The Database Language SQL (ii)

ICS 321 Spring 2011 The Database Language SQL (ii)

ICS 321 Spring 2011 The Database Language SQL (ii). Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. UNION, INTERSECT & EXCEPT. Set-manipulation constructs for result sets of SQL queries that are union-compatible

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389 views • 18 slides
ICS 321 Fall 2009 Overview of Transaction Management

ICS 321 Fall 2009 Overview of Transaction Management

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295 views • 16 slides
ICS 321 Fall 2010 Overview of Transaction Processing

ICS 321 Fall 2010 Overview of Transaction Processing

ICS 321 Fall 2010 Overview of Transaction Processing. Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. Transactions in SQL. After connection to a database, a transaction is automatically started

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361 views • 15 slides
ICS 321 Fall 2010 Normal Forms (ii)

ICS 321 Fall 2010 Normal Forms (ii)

ICS 321 Fall 2010 Normal Forms (ii). Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. Redundancies & Decompositions. Hourly_Emps. Hourly_Emps. RatingWages. Decompositions.

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262 views • 14 slides
ICS 321 Fall 2009 Schema Refinement & Normal Forms (ii)

ICS 321 Fall 2009 Schema Refinement & Normal Forms (ii)

ICS 321 Fall 2009 Schema Refinement & Normal Forms (ii). Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. Two More Rules. Union If X ? Y and X ? Z , then X ? YZ Eg . FLD ? A and FLD ? T, then FLD ? AT Decomposition

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242 views • 14 slides
ICS 321 Spring 2011 Normal Forms 1

ICS 321 Spring 2011 Normal Forms 1

ICS 321 Spring 2011 Normal Forms 1. Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. The Problem with Redundancy. Hourly_Emps. Suppose hourly wages are determined by rating Redundant storage : (8,10) stored multiple times

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206 views • 9 slides
ICS 321 Fall 2009 Schema Refinement & Normal Forms

ICS 321 Fall 2009 Schema Refinement & Normal Forms

ICS 321 Fall 2009 Schema Refinement & Normal Forms. Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. The Problem with Redundancy. Hourly_Emps. Suppose hourly wages are determined by rating ( this is an eg of functional dependency )

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122 views • 2 slides

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