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SYBASE QUERY OPTIMIZATION CONCEPTS
Sybase Training Overview:

The Sybase Query Optimization concepts class provides the students with a detailed understanding of the methods by which the Sybase optimizer functions, and the hints that can be provided to the optimizer to achieve the most advantageous performance for Sybase queries. The optimizer steps of processing will be discussed in detail. The class will also cover statistics generation and usage, optimizations for single table queries as well as join queries, and the methodology to generate faster and more efficient code. Students will also obtain a detailed understanding of the usage and advantages of Sybase indexes.

Upon completion of the course, the students will have a detailed knowledge of the manner by which to achieve the most practical and efficient Sybase query processing through the optimizer.

Sybase Training Objectives:

Upon successful completion of this course, participants will be able to both understand how the Sybase optimizer works, and how to provide hints to the optimizer in order to obtain very efficient query processing.

The student will understand the internal means by which the optimizer processes, and will be knowledgeable of the advantages of Sybase indexes, the usage of optimizer tracing tools, and parallel processing in Sybase.

Sybase Training Prerequisites:

Students should be able to code Sybase SQL and Transact_SQL queries.

Sybase Training Audience:

This course is recommended for applications programmers, system and database administrators, database designers and all other related personnel who require an in-depth understanding of the means by which the Sybase optimizer functions. People who are interested in learning how to code efficient SQL statements in Sybase should also attend this course.

Course duration:

1 day

Sybase Training Course outline

Table structures

Data placement on disk

Optimizer functioning

Access methods

Usage of indexes

Explanation of different nodes

Statistics

Histograms

Execution plans

Execution plan options

Optimizer selectivity

Optimizer cardinality

Optimizer costs

Optimizer hints

Influencing the optimizer

Sort operations

Single table optimizations

Join - multi table optimizations

Nested iterations - sort/merge and hash joins

Optimizer processing for
  • AND
  • OR
  • In Like Between
  • Functions
  • Wild cards
  • Incompatible datatypes
  • Composite indexes
  • Variables
  • Covered query processing
SARG transitive closure

Join transitive closure

Query reformatting

Stored procedure optimizations

Stored procedure recompiles

Optimizer forcing

Parallel queries

Sybase table partitioning

Abstract query plans concepts and usage

Deferred compilation

Monitoring and Diagnostic access ( MDA ) tables
  • Their usage and advantages
In memory databases - concepts and usage




 
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