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SEQUEL
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· Complete management access to critical data
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key performance indicators, and dashboards
· System i-centric for real-time data analysis
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Subqueries vs. Joins
Hey, Ted:
Please settle a disagreement. Another developer claims that it is bad to use an SQL subquery if the same results can be achieved with a join. He says that database management systems can optimize joins better than they can optimize subqueries, which means that joins run faster than subqueries. Is this true? I seem to have heard somewhere that the query engine converts a subquery to a join when possible. READ MORE >
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Admin Alert: Fine Tuning User Access with Application Administration
by Joe Hertvik
Being a robust system developed over several decades, i5/OS has several valuable features that you may not be aware of. For example, the Application Administration function allows you to provide and deny access to many sensitive system functions. This week, I'll look at Application Administration and demonstrate how it can help you obtain better control over what your users can and cannot do on the system. READ MORE >
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Reader Feedback and Insights
We value your feedback and insights. Feel free to send a letter to the editor. Letters may be printed, unless otherwise specified, and edited for clarity or length. READ MORE >
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Senior Technical Editor: Ted Holt
Technical Editor: Joe Hertvik
Contributing Technical Editors: Erwin Earley, Brian Kelly, Michael Sansoterra
Publisher and Advertising Director: Jenny Thomas
Advertising Sales Representative: Kim Reed
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IT Jungle Store Top Book Picks
Easy Steps to Internet Programming for AS/400, iSeries, and System i: List Price, $49.95
The iSeries Express Web Implementer's Guide: List Price, $49.95
The System i RPG & RPG IV Tutorial and Lab Exercises: List Price, $59.95
The System i Pocket RPG & RPG IV Guide: List Price, $69.95
The iSeries Pocket Database Guide: List Price, $59.00
The iSeries Pocket SQL Guide: List Price, $59.00
The iSeries Pocket Query Guide: List Price, $49.00
The iSeries Pocket WebFacing Primer: List Price, $39.00
Migrating to WebSphere Express for iSeries: List Price, $49.00
Getting Started With WebSphere Development Studio Client for iSeries: List Price, $89.00
Getting Started with WebSphere Express for iSeries: List Price, $49.00
Can the AS/400 Survive IBM?: List Price, $49.00
Chip Wars: List Price, $29.95
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July 4, 2009: Volume 11, Number 27
June 27, 2009: Volume 11, Number 26
June 20, 2009: Volume 11, Number 25
June 13, 2009: Volume 11, Number 24
June 6, 2009: Volume 11, Number 23
May 30, 2009: Volume 11, Number 22
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