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50401A-ENU_Powerpnt_07
50401A-ENU_Powerpnt_07

... Lesson 2: Refactoring Cursors into Queries • Building a T-SQL Cursor • Common Scenarios for Cursor-Based Operations • Demonstration: How To Refactor a Cursor • Discussion: Using Cursors • Guidelines for Using Result Set-Based Operations • Selecting Appropriate Server-Side Cursors • Selecting Approp ...
User-Defined Table Operators: Enhancing Extensibility for ORDBMS
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... are allowed to refer to these input tables. Generally speaking, a new UDTO can be sequentially executed as follows: All input tables are first materialized. That means they can be furtheron accessed in a similar way as permanently stored base tables. Then the UDTO is executed using these input table ...
AppMetrics - Xtremesoft, Inc
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... “By using AppMetrics, the availability of the application has increased by several percentage points. Considering for every one percentage point of additional availability 1000 man-hours of down-time are saved--this has resulted in millions of dollars in improved efficiency throughout our organizati ...
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Unifying Data and Domain Knowledge Using Virtual Views    Kalyana Krishnan  Overview 

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Database Rootkits
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View-based Query Processing for Semistructured Data.
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... number of rows. With large tables, indexes have a large effect on database I/O performance. Operations, which search and operate upon a single database row or small number of database rows, should have a nonclustered or clustered index defined upon the column or columns that provide the highest leve ...
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A Discussion of Some Intuitions of Defeasible Reasoning
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Oracle 10g Datafile I/O Statistics
Oracle 10g Datafile I/O Statistics

... The following script, wait_time_detail_10g.sql, compares the wait event values from dba_hist_waitstat and dba_hist_active_sess_history. This script quickly allows the identification of the exact objects that are experiencing wait events:  wait_time_detail_10g.sql ...
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SQL

SQL (/ˈɛs kjuː ˈɛl/, or /ˈsiːkwəl/; Structured Query Language) is a special-purpose programming language designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS).Originally based upon relational algebra and tuple relational calculus, SQL consists of a data definition language, data manipulation language, and a data control language. The scope of SQL includes data insert, query, update and delete, schema creation and modification, and data access control. Although SQL is often described as, and to a great extent is, a declarative language (4GL), it also includes procedural elements.SQL was one of the first commercial languages for Edgar F. Codd's relational model, as described in his influential 1970 paper, ""A Relational Model of Data for Large Shared Data Banks."" Despite not entirely adhering to the relational model as described by Codd, it became the most widely used database language.SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987. Since then, the standard has been revised to include a larger set of features. Despite the existence of such standards, though, most SQL code is not completely portable among different database systems without adjustments.
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