QueryKeyExists

Last updated on May 30, 2024 | Also applies to ColdFusion

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CFML Reference User Guide
ColdFusion functions
ColdFusion tags
1. ColdFusion tag summary
2. ColdFusion tags by category
  1. Application framework tags
    1. cfapplication
    2. cfassociate
    3. cferror
    4. cfimport
    5. cfinterface
    6. cflock
    7. cfscript
    8. cfthread
  2. Communications tags
  3. Database manipulation tags
  4. Data output tags
    1. cfchart
  5. Debugging tags
    1. cfdump
    2. cftimer
    3. cftrace
  6. Exception handling tags
    1. cfcatch
    2. cferror
    3. cffinally
    4. cfrethrow
    5. cfthrow
    6. cftry
  7. Extensibility tags
    1. cfchart
    2. cfchartdata
    3. cfchartseries
    4. cfcollection
    5. cfcomponent
    6. cfexecute
    7. cfftp
    8. function
    9. cfindex
    10. cfinterface
    11. cfinvoke
    12. cfinvokeargument
    13. cfobject
    14. cfproperty
    15. cfreport
    16. cfreportparam
    17. cfreturn
    18. cfsearch
    19. cfsharepoint
    20. cfspreadsheet
    21. cfwddx
    22. cfxml
  8. File management tags
    1. cfdirectory
    2. cffile
    3. cffileupload
    4. cfftp
    5. cfzip
    6. cfzipparam
  9. Flow-control tags
    1. cfabort
    2. cfbreak
    3. cfcase
    4. cfcontinue
    5. cfdefaultcase
    6. cfelse
    7. cfelseif
    8. cfexecute
    9. cfexit
    10. cfif
    11. cfinclude
    12. cflocation
    13. cfloop
    14. cfrethrow
    15. cfswitch
    16. cfthrow
    17. cftry
  10. Forms tags
    1. cfapplet
    2. cfcalendar
    3. cffileupload
    4. cfform
    5. cfformgroup
    6. cfformitem
    7. cfgrid
    8. cfgridcolumn
    9. cfgridrow
    10. cfgridupdate
    11. cfinput
    12. cfpdf
    13. cfpdfform
    14. cfpdfformparam
    15. cfpdfparam
    16. cfpdfsubform
    17. cfselect
    18. cfslider
    19. cftextarea
    20. cftree
    21. cftreeitem
  11. Internet Protocol tags
    1. cfajaximport
    2. cfajaxproxy
    3. cfftp
    4. cffeed
    5. cfimap
    6. cfhttp
    7. cfhttpparam
    8. cfldap
    9. cfmail
    10. cfmailparam
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    12. cfpop
    13. cfsprydataset
  12. Page processing tags
    1. cfcache
    2. cfcontent
    3. cfflush
    4. cfheader
    5. cfhtmlhead
    6. cfinclude
    7. cfprocessingdirective
    8. cfsetting
    9. cfsilent
  13. Security tags
  14. Variable manipulation tags
    1. cfcookie
    2. cfdump
    3. cfparam
    4. cfregistry
    5. cfsavecontent
    6. cfschedule
    7. cfset
    8. cfsetting
  15. Other tags
    1. cfimage
    2. cflog
    3. cfregistry
3. Tags a-b
4. Tags c
5. Tags f
6. Tags g-h
  1. cfgraph
  2. cfgraphdata
  3. cfgrid
  4. cfgridcolumn
  5. cfgridrow
  6. cfgridupdate
  7. cfheader
  8. cfhtmlhead
  9. cfhtmltopdf
  10. cfhtmltopdfitem
  11. cfhttp
  12. cfhttpparam
7. Tags i
  1. cfif
  2. cfimage
  3. cfimap
  4. cfimapfilter
  5. cfimpersonate
  6. cfimport
  7. cfinclude
  8. cfindex
  9. cfinput
  10. cfinsert
  11. cfinterface
  12. cfinvoke
  13. cfinvokeargument
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9. Tags m-o
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  1. cfparam
  2. cfpdf
  3. cfpdfform
  4. cfpdfformparam
  5. cfpdfparam
  6. cfpdfsubform
  7. cfpod
  8. cfpop
  9. cfpresentation
  10. cfpresentationslide
  11. cfpresenter
  12. cfprint
  13. cfprocessingdirective
  14. cfprocparam
  15. cfprocresult
  16. cfprogressbar
  17. cfproperty
  18. cfquery
  19. cfqueryparam
11. Tags r-s
  1. cfregistry
  2. cfreport
  3. cfreportparam
  4. cfrethrow
  5. cfreturn
  6. cfsavecontent
  7. cfschedule
  8. cfscript
  9. cfsearch
  10. cfselect
  11. cfservlet
  12. cfservletparam
  13. cfset
  14. cfsetting
  15. cfsharepoint
  16. cfsilent
  17. cfslider
  18. cfspreadsheet
  19. cfsprydataset
  20. cfstoredproc
  21. cfswitch
12. Tags t
  1. cftable
  2. cftextarea
  3. cftextinput
  4. cfthread
  5. cfthrow
  6. cftimer
  7. cftooltip
  8. cftrace
  9. cftransaction
  10. cftree
  11. cftreeitem
  12. cftry
13. Tags u-z
  1. cfupdate
  2. cfwddx
  3. cfwebsocket
  4. cfwindow
  5. cfxml
  6. cfzip
  7. cfzipparam
CFML Reference
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Cloud services

Description

This function checks the query for a column with the same name as the key provided.

Returns

True if a matching column exists, false otherwise.

Category

Query functions

History

ColdFusion (2018 release): Introduced named parameters.

New in Adobe ColdFusion (2016 release)

See also

QuerySort, QueryFilter, QueryEach

Syntax

boolean QueryKeyExists(Object query, String column)

boolean QueryKeyExists(Object query, String column)

Parameters

Parameter	Description
query	(Required) Query to be checked whether a key is available.
column	(Required) Key to be matched with the columns.

Example 1

myQuery = queryNew("id,name,amount","Integer,Varchar,Integer",

[

{id=1,name="One",amount=15},

{id=2,name="Two",amount=18},

{id=3,name="Three",amount=32}

]);

status=QueryKeyExists(myquery,"amount");

if (status=="YES"){

writeOutput("Matching column exists: "& status);

}

else{

writeOutput("Matching column exists: "& status);

}

</cfscript>

<cfscript> myQuery = queryNew("id,name,amount","Integer,Varchar,Integer", [ {id=1,name="One",amount=15}, {id=2,name="Two",amount=18}, {id=3,name="Three",amount=32} ]); status=QueryKeyExists(myquery,"amount"); if (status=="YES"){ writeOutput("Matching column exists: "& status); } else{ writeOutput("Matching column exists: "& status); } </cfscript>

<cfscript>
    myQuery = queryNew("id,name,amount","Integer,Varchar,Integer", 
                [ 
                        {id=1,name="One",amount=15}, 
                        {id=2,name="Two",amount=18}, 
                        {id=3,name="Three",amount=32} 
                ]); 
    status=QueryKeyExists(myquery,"amount");
       if (status=="YES"){
             writeOutput("Matching column exists: "& status);
       }
       else{
             writeOutput("Matching column exists: "& status);
       }
</cfscript>

Example 2

<cfquery

name="courses" datasource="cfdocexamples"

cachedwithin="#CreateTimeSpan(0, 6, 0, 0)#">

SELECT CORNUMBER,DEPT_ID,COURSE_ID,CORNAME

FROM COURSELIST

</cfquery>

//Use an absolute path for the files. -

theDir=GetDirectoryFromPath(GetCurrentTemplatePath());

theFile=theDir & "courses.xls";

//Create two empty ColdFusion spreadsheet objects

theSheet = SpreadsheetNew("CourseData");

SpreadsheetAddRows(theSheet,courses);

</cfscript>

<cfspreadsheet action="write" filename="#theFile#" name="theSheet"

sheetname="courses" overwrite=true>

<cfoutput>querydata.KeyExists("col_1"):#querydata.KeyExists("col_1")#</cfoutput>

<cfquery name="courses" datasource="cfdocexamples" cachedwithin="#CreateTimeSpan(0, 6, 0, 0)#"> SELECT CORNUMBER,DEPT_ID,COURSE_ID,CORNAME FROM COURSELIST </cfquery> <cfscript> //Use an absolute path for the files. - theDir=GetDirectoryFromPath(GetCurrentTemplatePath()); theFile=theDir & "courses.xls"; //Create two empty ColdFusion spreadsheet objects theSheet = SpreadsheetNew("CourseData"); SpreadsheetAddRows(theSheet,courses); </cfscript>  <cfspreadsheet action="write" filename="#theFile#" name="theSheet" sheetname="courses" overwrite=true> <cfspreadsheet action="read" src="#theFile#" sheetname="courses" query="queryData"> <cfoutput>querydata.KeyExists("col_1"):#querydata.KeyExists("col_1")#</cfoutput>

<cfquery 
       name="courses" datasource="cfdocexamples" 
       cachedwithin="#CreateTimeSpan(0, 6, 0, 0)#"> 
       SELECT CORNUMBER,DEPT_ID,COURSE_ID,CORNAME 
       FROM COURSELIST 
</cfquery> 

<cfscript> 
    //Use an absolute path for the files. -
    theDir=GetDirectoryFromPath(GetCurrentTemplatePath()); 
    theFile=theDir & "courses.xls"; 
    //Create two empty ColdFusion spreadsheet objects
    theSheet = SpreadsheetNew("CourseData"); 
   SpreadsheetAddRows(theSheet,courses); 
    
</cfscript> 
 
<!--- Write the two sheets to a single file ---> 
<cfspreadsheet action="write" filename="#theFile#" name="theSheet"  
    sheetname="courses" overwrite=true> 
<cfspreadsheet action="read" src="#theFile#" sheetname="courses" query="queryData"> 

<cfoutput>querydata.KeyExists("col_1"):#querydata.KeyExists("col_1")#</cfoutput>

Using member function

myResult=QueryExecute("SELECT * FROM EMPLOYEES",[],{datasource="cfdocexamples"});

status=myResult.keyexists("LOCATION");

if (status=="YES"){

WriteOutput("Matching column exists: "& status);

}

else{

WriteOutput("Matching column exists: "& status);

}

</cfscript>

<cfscript> myResult=QueryExecute("SELECT * FROM EMPLOYEES",[],{datasource="cfdocexamples"}); status=myResult.keyexists("LOCATION"); if (status=="YES"){ WriteOutput("Matching column exists: "& status); } else{ WriteOutput("Matching column exists: "& status); } </cfscript>

<cfscript>
       myResult=QueryExecute("SELECT * FROM EMPLOYEES",[],{datasource="cfdocexamples"});
       status=myResult.keyexists("LOCATION");
       if (status=="YES"){
             WriteOutput("Matching column exists: "& status);
       }
       else{
             WriteOutput("Matching column exists: "& status);
       }
</cfscript>

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QueryKeyExists

Description

Returns

Syntax

Parameters

Example 1

Example 2

Using member function

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