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Oracle® PL/SQL by Example
Oracle® PL/SQL by Example

CSE 462 – Introduction to JDBC
CSE 462 – Introduction to JDBC

... CSE 462 – Introduction to JDBC JDBC API (continued) Statement Executes simple SQL statements PreparedStatement (extends Statement) A SQL statement is precompiled for multiple executions Precompilation guarantees efficient execution The SQL statement may be parameterized ('?' placeholders) Each exec ...
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... improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time without notice. Any references in this information to non-IBM Web sites are provided for convenience only and do not in any manner serve as an endorsement of those Web sites. The materials a ...
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... language that does not provide parameter types, such as Perl and PHP. The application developers write a application with the premise that only numeric value is inputted for the numeric parameters, but the application will process the input value as string when non-numeric value is entered if the pr ...
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... server machine running the database needs the the ODBC driver. (In some cases the client and the server may be the same machine).  Secondly you might need to set environment variables and paths to appropriate values. This may differ a lot between different os’s, databases and ODBC drivers. This is ...
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... Understanding Updates • For each update in the workload: – Which attributes are involved in predicates? – How selective are these conditions likely to be? – What types of update operations and what attributes do they affect? – How often are records inserted/updated/deleted? ...
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Improving Performance using Query Rewrite in Oracle Database 10g
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... Give an end-user or DBA three wishes for the database, and its highly likely that one of them will be to improve the performance. But what if you have already done all the standard tuning, is there anything else that you could try? Well significant performance gains can often be achieved using query ...
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... system, and the result is returned to the logic programming language where it is held in the standard datastructure ResultRelation. Both ProjectionTerm and DatabaseGoal can be constructed at runtime. This allows a dynamic definition of database access to result in maximally restrictive queries which ...
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... for example, that market["bands",1] is 6000 and that market["coils",3] is 3500. From the first row, we can also see that revenue["bands",1] is 25, Make["bands",1] is 5990, and Sell["bands",1] is 6000. Again various names from the AMPL model are used as column headings, except for TIME, which must be ...
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... separate machine, or group any combination of components on a single machine or multiple machines. All of these components also can be installed on a single machine for testing purposes. ...
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... big table. The information in these views is from individual fields and from generated fields. Generated fields can be from more base tables that have been combined and manipulated to form more fields. These can become incredibly complex. The views provided by Synergetic have been designed to accomm ...
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... Understanding Updates • For each update in the workload: – Which attributes are involved in predicates? – How selective are these conditions likely to be? – What types of update operations and what attributes do they affect? – How often are records inserted/updated/deleted? ...
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Firebird Interactive SQL Utility
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... If you do not have the Firebird bin directory on your path, then either go to the bin subdirectory of your Firebird installation and type isql (Windows) or ./isql (Linux) at the command prompt, or, type the full path to the isql application to execute it. If the bin is on your path, you may start it ...
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... 1.1 The Power of Principles Tuning rests on a foundation of informed common sense. This makes it both easy and hard. Tuning is easy because the tuner need not struggle through complicated formulas or theorems. Many academic and industrial researchers have tried to put tuning and query processing gen ...
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Relational Database (RDBMS via ODBC) Interface to the PI system
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... • It is important to understand that XML was designed to store, carry, and exchange data. XML was not designed to display data. • XML can Separate Data from HTML • With XML, your data is stored outside your HTML. • When HTML is used to display data, the data is stored inside your HTML. With XML, dat ...
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Relational algebra

Relational algebra, first described by E.F. Codd while at IBM, is a family of algebra with a well-founded semantics used for modelling the data stored in relational databases, and defining queries on it.The main application of relational algebra is providing a theoretical foundation for relational databases, particularly query languages for such databases, chief among which is SQL.
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