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| | Cursor (databases) - Wikipedia, the free encyclopedia |
 | | Disadvantages of cursors: Each time you fetch a row from the cursor, it results in a network round trip, where as a normal SELECT query makes only one round trip, however large the result set is. Cursors are also costly because they require more resources and temporary storage (results in more I/O operations). | | | In database packages, the term cursor refers to a control structure for the successive traversal (and potential processing) of records returned by a query. | | | Christopher J. Date: Database in Depth, O'Reilly and Associates, ISBN 0-596-10012-4 |
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http://en.wikipedia.org/wiki/Cursor_(databases)
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| | Cursor Objects These objects represent a database cursor, which is used to manage the context of a fetch operation. | | | DBI Helper Objects Many databases need to have the input in a particular format for binding to an operation's input parameters. | | | RAW This object is used to describe (large) binary columns in a database (e.g. |
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http://www.python.org/peps/pep-0248.txt
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| | ArcInfo AND ORACLE: AN APPROACH FOR FEATURE STORAGE AND REPRESENTATION FROM ORACLE |
| | The purpose of the GUI is to combine the best of relational database and GIS into a cohesive system to perform the required tasks of a tabular data system while allowing the user to access the spatial data components and to allow the user to benefit from a geographic point-and-click paradigm. | | | The PRMS displays spatial data from the database when triggered by either a user-defined query or by a pre-defined system query. | | | Database users may find a GIS inadequate to support their querying and reporting needs. |
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http://gis.esri.com/library/userconf/proc95/to100/p057.html
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| | Databases 4 |
| | When the cursor location is in the client, all processing of the dataset takes place on the user's, or client's, computer; the data is retrieved from the server and held in the memory of the client computer while processing takes place. | | | It is, of course, possible to create a database with a program such as MS Access for use on a single computer, but most serious work with databases now takes place within the context of a network. | | | A client-side cursor location (for a local database such as a list of contacts on a personal computer) is limited to the static cursor only, while the other three are limited to server-side locations. |
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http://www.asiplease.net/computing/delphi/databases4.htm
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| | [No title] |
| | You can create an updatable cursor only for single-table queries, not for multiple-table queries or queries containing joins. | | | A database query is said to return a cursor. | | | For a cursor to be updatable, the SELECT statement must be an updatable query, that is, one that allows updating. |
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http://www.wooten.net/livewire/database.htm
(6337 words)
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| | PalmSource Developer News #16 |
| | The most important feature of schema databases is that they are extensible in a non-fragile way, since the format of database entries are stored in the databases themselves, not in the applications that access the databases. | | | But since an extended database is only for a device running Palm OS Cobalt, and your code will be running with a different endianness of its numbers, it is a natural time to switch the endianness of your saved data to match. | | | In schema databases each entry is referred to as a row, to avoid confusion with records in non-schema databases. |
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http://www.palmsource.com/developers/newsletter/20040501.html
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| | [No title] |
| | Closing a database When a program is finished with a database, the database should be closed. | | | When two or more databases have tables that share the same name, a database handle must be prefixed to those table names to differentiate them from one another in transactions. | | | Later, when the program closes these databases, the database handles are no longer in use. |
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http://www.ida.liu.se/~TDDA03/Docs/Interbase/proggd.txt
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| | Python Database Connectivity v0.5 |
| | Do all the databases you are aware of have native field types which exactly match each of the emulated field types listed in the field types section or would there be a more appropriate choice of values each field type should have. | | | If a particular database engine does not natively support part of the API it should be emulated in the derived classes even if it is difficult or slow to do so. | | | Variation between database engines occurs in SQL syntax, choice of field types and choice of which Python object to use to represent field values. |
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http://www.pythonweb.org/projects/pdbc/html
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| | While this document is specifically tailored to describe the use of Paradox as it is available on the personal computers in the UIC ADN Computer Center public DOS microcomputer labs (which does not include the ECSW lab), most of the information in the document is useful any time you use Paradox. | | | Using the Public DOS Personal Computers at UIC Quick Facts for Using Existing Paradox Databases UIC ADN Computer Center Document #1411014 13 Pages September 22, 1993 Paradox is the Borland menu-driven, relational database program for IBM personal computers and compatibles. | | | When copying Paradox Tables to diskette when you do back ups, always ______________________________________________________________________ select ToolsCopy from the Paradox Main Menu (instead of the DOS COPY _______ ______________________________________________________ command) so that the Table's associated family of files are copied as ________ well and locks are automatically put on your data by Paradox during the copy process. |
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http://www.uic.edu/depts/adn/infwww/txt/v1411014.txt
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| | Book Review: Beginning Visual Basic 6 Databases |
| | With ADO, the understanding of cursors is extremely important. | | | Well, every time a new Recordset object is created, a cursor is automatically opened. | | | This way it only has to manage small keys rather than large chunks of data. |
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http://www.developer.com/net/vb/print.php/10926_1537101_20
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| | ASPN : Python Cookbook : Yet another way to use fields for databases |
| | Title: Yet another way to use fields for databases | | | The cursor description and the dictionary of field names are stored in the list that wraps the tuples. | | | A lightweight method to access the field names from a database. |
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http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/223610
(206 words)
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| | [No title] |
| | Cancel changes that are part of the current | | | Cursor is initially placed within first row of | | | Database ConnectivitySection B – Connecting to Databases with Active Server Pages |
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http://homepage.mac.com/tsinclair/CS240/Notes/Chap11b.html
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