1 / 27

Efficient Data Handling with CFDatabase for Improved Web Performance

Learn about data persistence, ODBC connectivity, SQL interaction, and performance optimization techniques using ColdFusion. Practice inserting, selecting, updating, and deleting data with practical examples.

tamber
Télécharger la présentation

Efficient Data Handling with CFDatabase for Improved Web Performance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CF Database I • Jeff Peters • jeff@grokfusebox.com

  2. Why Are You Here? • Data and Persistence • ODBC • Relational vs. Flat • SQL • CFQUERY, CFOUTPUT, CFLOOP • Practicum

  3. Data and Persistence • Persistence = Turn off, turn on—data still there. • Secondary storage (disk or other nonvolatile) • DBMS • Excel • Text file

  4. ODBC • Open DataBase Connectivity • Allows a common interface to many databases. • Does not homogenize SQL • Must be configured on the CF server

  5. Relational vs. Flat • Relational: Tables may be linked (related) to make storage more efficient. • E.F. Codd • Flat: Tables cannot be linked. Think of a spreadsheet.

  6. CFQUERY • Allows any SQL statement to be run. • Returns a recordset depending on SQL. • Can pass authentication attributes: • USERNAME • PASSWORD • Can cache data for better performance.

  7. CFOUTPUT • Refers to a CFQUERY recordset to generate output to the browser. • May be nested using the GROUP attribute. • May NOT be nested without the GROUP attribute (see CFLOOP).

  8. CFLOOP • Refers to a CFQUERY recordset; does not produce output to the browser. • CFLOOP may also be used for incremental loops, lists, and objects—not the scope of this session.

  9. SQL • Structured Query Language • Common syntax for interacting with a database. (Beware variations) • SELECT, INSERT, UPDATE, DELETE • More complex commands available; related to DBA functions.

  10. Caching Queries • Improves performance by storing data in server memory. • Implemented through CFQUERY • CACHEDWITHIN attribute

  11. Practicum – ODBC • MS Access: CFDB101 • webroot\cfun03\CFDB101.mdb • MS Excel: CFDB101Excel • webroot\cfun03\Members.xls • Text File: CFDB101Text • webroot\cfun03\TextDB\Members

  12. Practicum – CFQUERY • SELECT • INSERT • DELETE • UPDATE

  13. Practicum – CFQUERYSELECT <cfquery name="qryGetMembers" datasource="CFDB101" dbtype="ODBC"> SELECT memberNumber, lastName, firstName, email, phone, memberSince FROM Members </cfquery> <cfdump var="#qryGetMembers#">

  14. Practicum – CFQUERYSELECT

  15. Practicum – CFQUERYINSERT <cfquery datasource="CFDB101" dbtype="ODBC"> INSERT INTO Members ( memberNumber, lastName, firstName, email, phone, memberSince ) VALUES ( 4, 'Adams', 'John Q.', 'jqada@grokfusebox.com', '7035554444', #CreateODBCDate(Now())# ) </cfquery>

  16. Practicum – CFQUERYINSERT

  17. Practicum – CFQUERYDELETE <cfquery datasource="CFDB101" dbtype="ODBC"> DELETE FROM Members WHERE memberNumber = '4' </cfquery>

  18. Practicum – CFQUERYDELETE

  19. Practicum – CFQUERYUPDATE <cfquery datasource="CFDB101" dbtype="ODBC"> UPDATE Members SET phone = '7035551212' WHERE memberNumber = '1' </cfquery>

  20. Practicum – CFQUERYUPDATE

  21. Practicum – CFOUTPUT <cfquery name="qryGetMembers" datasource="CFDB101" dbtype="ODBC"> SELECT lastName, firstName, memberSince FROM Members ORDER BY memberSince </cfquery> <h3> <cfoutput query="qryGetMembers"> <span style="color: red"> #DateFormat(memberSince,"mm/dd/yyyy")# </span>: #firstName# #lastName#<br> </cfoutput> </h3>

  22. Practicum – CFOUTPUT

  23. Practicum – CFLOOP <cfquery name="qryGetMembers" datasource="CFDB101" dbtype="ODBC"> SELECT lastName, firstName, memberSince FROM Members ORDER BY memberSince </cfquery> <h3> <cfloop query="qryGetMembers"> <cfset memberYears = DateDiff("YYYY",memberSince,Now())> <cfoutput> #firstName# #lastName# - Member for #memberYears# years. <br> </cfoutput> </cfloop> </h3>

  24. Practicum – CFLOOP Thomas Jefferson - Member for 226 years. John Adams - Member for 226 years. George Washington - Member for 226 years.

  25. Practicum – Caching <cfquery name="qryGetMembers" datasource="CFDB101" dbtype="ODBC" cachedwithin="#CreateTimeSpan(1, 0, 0, 0)#"> SELECT memberNumber, lastName, firstName, email, phone, memberSince FROM Members </cfquery>

  26. Bonus – Aqua Data Studio • http://www.aquafold.com • Interfaces with DB2, Informix, MySQL, Oracle, PostgreSQL, SQL Server, SyBase, any JDBC source.

  27. Q & A

More Related