CF Database I Jeff Peters

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

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

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

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.

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.

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).

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.

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.

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

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

Practicum – CFQUERY SELECT INSERT DELETE UPDATE

Practicum – CFQUERY SELECT SELECT memberNumber, lastName, firstName, , phone, memberSince FROM Members

Practicum – CFQUERY SELECT

Practicum – CFQUERY INSERT INSERT INTO Members ( memberNumber, lastName, firstName, , phone, memberSince ) VALUES ( 4, 'Adams', 'John Q.', ' ', #CreateODBCDate(Now())# )

Practicum – CFQUERY INSERT

Practicum – CFQUERY DELETE DELETE FROM Members WHERE memberNumber = '4'

Practicum – CFQUERY DELETE

Practicum – CFQUERY UPDATE UPDATE Members SET phone = ' ' WHERE memberNumber = '1'

Practicum – CFQUERY UPDATE

Practicum – CFOUTPUT SELECT lastName, firstName, memberSince FROM Members ORDER BY memberSince #DateFormat(memberSince,"mm/dd/yyyy")# : #firstName# #lastName#

Practicum – CFOUTPUT

Practicum – CFLOOP SELECT lastName, firstName, memberSince FROM Members ORDER BY memberSince #firstName# #lastName# - Member for #memberYears# years.

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

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

Bonus – Aqua Data Studio Interfaces with DB2, Informix, MySQL, Oracle, PostgreSQL, SQL Server, SyBase, any JDBC source.

Q & A