'Tuples' diaporamas de présentation

Introduction to PYTHON

Introduction to PYTHON. Sajid Gul Khawaja. Introduction to Python. Python is a high-level programming language Open source and community driven Standard distribution includes many modules Dynamic typed Source can be compiled or run just-in-time Similar to perl, tcl, ruby.

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LORE L ight O bject Re pository

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Database Systems ( ????? )

Database Systems ( ????? ). December 19, 2004 Lecture #12 By Hao-hua Chu ( ??? ). Announcement. Next week reading: Chapter 16 Skip Chapter 15 Hand in your assignment #5. Evaluating Relational Operators. Chapter 14. Outline.

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Carnegie Mellon Univ. Dept. of Computer Science 15-415/615 - DB Applications

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Implementation of Relational Operations

Implementation of Relational Operations. CS186, Fall 2005 R&G - Chapter 14. First comes thought; then organization of that thought, into ideas and plans; then transformation of those plans into reality. The beginning, as you will observe, is in your imagination.

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Implementation of Relational Operations

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Implementation of Relational Operations

Implementation of Relational Operations. R&G - Chapter 14. First comes thought; then organization of that thought, into ideas and plans; then transformation of those plans into reality. The beginning, as you will observe, is in your imagination. Napolean Hill.

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ECE 569 Database System Engineering Fall 2004 Topic VIII: Query Execution and optimization

ECE 569 Database System Engineering Fall 2004 Topic VIII: Query Execution and optimization. Yanyong Zhang www.ece.rutgers.edu/~yyzhang Course URL www.ece.rutgers.edu/~yyzhang/fall04. Select Operation. simple condition (C=A ? V)

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ECE 569 Database System Engineering Spring 2004 Topic VIII: Query Execution and optimization

ECE 569 Database System Engineering Spring 2004 Topic VIII: Query Execution and optimization. Yanyong Zhang www.ece.rutgers.edu/~yyzhang Course URL www.ece.rutgers.edu/~yyzhang/spring04. Select Operation. simple condition (C=A ? V)

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Evaluation of Relational Operations

Evaluation of Relational Operations. Relational Operations. We will consider how to implement: Selection ( ) Selects a subset of rows from relation. Projection ( ) Deletes unwanted columns from relation. Join ( ) Allows us to combine two relations.

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Representing Data Elements

Representing Data Elements. Fields, Records, Blocks Variable-length Data Modifying Records. Source: our textbook. Overview. Attributes are represented by sequences of bytes, called fields Tuples are represented by collections of fields, called records

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Query Execution

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Relational Operations

Relational Operations. We will consider how to implement: Selection ( ) Selects a subset of rows from relation. Projection ( ) Deletes unwanted columns from relation. Join ( ) Allows us to combine two relations.

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QUERY EXECUTION

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Oracle Measurement Results

Oracle Measurement Results. Prof. Bayer, PhD Dipl.-Inform. Volker Markl Roland Pieringer. Contents. Environment of the benchmark suite Results of the measurements Example measurement suite Comparison of the operating systems SUN Solaris and Windows NT Variation of the sizes of the tuples

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Relational Operator Evaluation

Relational Operator Evaluation. Overview. Application Programmer (e.g., business analyst, Data architect). Application. Sophisticated Application Programmer (e.g., SAP admin). Query Processor. Indexes. Storage Subsystem. Concurrency Control. Recovery. DBA, Tuner. Operating System.

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Evaluation of Relational Operations: Other Techniques

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Evaluation of Relational Operations

Evaluation of Relational Operations. Chapter 12, Part A. Relational Operations. We will consider how to implement: Selection ( ) Selects a subset of rows from relation. Projection ( ) Deletes unwanted columns from relation.

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i3 and DOA

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