Create a ColdFusion page with the following content:
Terakhir dikemas kini pada
27 Dis 2022
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Juga digunakan pada ColdFusion
Query of Queries is based on manipulating the recordset, which you can create using the cfquery tag and other ways.
When you execute a database query, Adobe ColdFusion retrieves the data in a recordset. In addition to presenting recordset data to the user, you can manipulate this recordset to improve the performance of your application.
Because a recordset contains rows (records) and columns (fields), you can think of it as a virtual database table, or as a spreadsheet. For example, the cfpop tag retrieves a recordset in which each row is a message and each column is a message component, such as To, From, and Subject.
Creating a recordset
You can perform a Query of Queries on any ColdFusion tag or function that generates a recordset, including the following:
- cfcollection
- cfdirectory
- cfftp
- cfhttp
- cfindex
- cfldap
- cfmail
- cfpop
- cfprocresult
- cfquery(against a database or against another Query of Queries)
- cfsearch
- cfstoredproc
- cfwddx
- The QueryNew function
Creating a recordset with the QueryNew() function
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<html><head><title>The queryNew function</title></head><body><h2>QueryNew Example</h2><!--- Create a query, specify data types for each column. ---><cfset qInstruments = queryNew("name, instrument, years_playing","CF_SQL_VARCHAR, CF_SQL_VARCHAR, CF_SQL_INTEGER")><!--- Add rows. ---><cfset newrow = queryaddrow(qInstruments, 3)><!--- Set values in cells. ---><cfset temp = querysetcell(qInstruments, "name", "Thor", 1)><cfset temp = querysetcell(qInstruments, "instrument", "hammer", 1)><cfset temp = querysetcell(qInstruments, "years_playing", "1000", 1)><cfset temp = querysetcell(qInstruments, "name", "Bjorn", 2)><cfset temp = querysetcell(qInstruments, "instrument", "sitar", 2)><cfset temp = querysetcell(qInstruments, "years_playing", "24", 2)><cfset temp = querysetcell(qInstruments, "name", "Raoul", 3)><cfset temp = querysetcell(qInstruments, "instrument", "flute", 3)><cfset temp = querysetcell(qInstruments, "years_playing", "12", 3)><!--- Output the query. ---><cfoutput query="qInstruments"><pre>#name# #instrument# #years_playing#</pre></cfoutput><h3>Individual record retrieval:</h3><cfoutput><p>#qInstruments.name[2]# has played #qInstruments.instrument[2]# for#qInstruments.years_playing[2]# years.</p></cfoutput></body></html><html> <head> <title>The queryNew function</title> </head> <body> <h2>QueryNew Example</h2> <!--- Create a query, specify data types for each column. ---> <cfset qInstruments = queryNew("name, instrument, years_playing", "CF_SQL_VARCHAR, CF_SQL_VARCHAR, CF_SQL_INTEGER")> <!--- Add rows. ---> <cfset newrow = queryaddrow(qInstruments, 3)> <!--- Set values in cells. ---> <cfset temp = querysetcell(qInstruments, "name", "Thor", 1)> <cfset temp = querysetcell(qInstruments, "instrument", "hammer", 1)> <cfset temp = querysetcell(qInstruments, "years_playing", "1000", 1)> <cfset temp = querysetcell(qInstruments, "name", "Bjorn", 2)> <cfset temp = querysetcell(qInstruments, "instrument", "sitar", 2)> <cfset temp = querysetcell(qInstruments, "years_playing", "24", 2)> <cfset temp = querysetcell(qInstruments, "name", "Raoul", 3)> <cfset temp = querysetcell(qInstruments, "instrument", "flute", 3)> <cfset temp = querysetcell(qInstruments, "years_playing", "12", 3)> <!--- Output the query. ---> <cfoutput query="qInstruments"> <pre>#name# #instrument# #years_playing#</pre> </cfoutput> <h3>Individual record retrieval:</h3> <cfoutput> <p>#qInstruments.name[2]# has played #qInstruments.instrument[2]# for #qInstruments.years_playing[2]# years.</p> </cfoutput> </body> </html>
<html> <head> <title>The queryNew function</title> </head> <body> <h2>QueryNew Example</h2> <!--- Create a query, specify data types for each column. ---> <cfset qInstruments = queryNew("name, instrument, years_playing", "CF_SQL_VARCHAR, CF_SQL_VARCHAR, CF_SQL_INTEGER")> <!--- Add rows. ---> <cfset newrow = queryaddrow(qInstruments, 3)> <!--- Set values in cells. ---> <cfset temp = querysetcell(qInstruments, "name", "Thor", 1)> <cfset temp = querysetcell(qInstruments, "instrument", "hammer", 1)> <cfset temp = querysetcell(qInstruments, "years_playing", "1000", 1)> <cfset temp = querysetcell(qInstruments, "name", "Bjorn", 2)> <cfset temp = querysetcell(qInstruments, "instrument", "sitar", 2)> <cfset temp = querysetcell(qInstruments, "years_playing", "24", 2)> <cfset temp = querysetcell(qInstruments, "name", "Raoul", 3)> <cfset temp = querysetcell(qInstruments, "instrument", "flute", 3)> <cfset temp = querysetcell(qInstruments, "years_playing", "12", 3)> <!--- Output the query. ---> <cfoutput query="qInstruments"> <pre>#name# #instrument# #years_playing#</pre> </cfoutput> <h3>Individual record retrieval:</h3> <cfoutput> <p>#qInstruments.name[2]# has played #qInstruments.instrument[2]# for #qInstruments.years_playing[2]# years.</p> </cfoutput> </body> </html> -
Save the page as queryNew.cfm in the myapps directory under the web_root directory.
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Display queryNew.cfm in your browser
