You actually have two options.
One with SQL VAR another is with SQL Job.
For the SQL VAR you will need something like this in a SCRI .
You are writing it to a .csv not a real excel.
:SET &SQL_VAR# = <Your SQL VARA>
:SET &AGENT# = <Agent/Server where to store the file>
:SET &LOGIN# = <Login object for the agent>
:SET &HND# = PREP_PROCESS_VAR(&SQL_VAR#)
:SET &RET# = WRITE_PROCESS(&HND#,"<PATH-TO-FILE\FILE.csv>",&AGENT#,&LOGIN#,,,,,";")
Then you can use another job and/or script to convert the .csv to .xlsx
You can use a SQL Job, save the report on the agent, and send the report as an email or start another job to do something with that file.
The actual name of the file is random but can be retrieved as variable. The file is with .txt extension but its a csv. Simple rename with do the work.
In the SQL tab of the job select "Store to file"
In the Post_Process add this (arrange as per your liking)
:SET &HND# = PREP_PROCESS_REPORTLIST()
:PROCESS &HND#
: SET &RH_TYPE# = GET_PROCESS_LINE(&HND#, 1)
: SET &START_TIME# = GET_PROCESS_LINE(&HND#, 2)
: SET &END_TIME# = GET_PROCESS_LINE(&HND#, 3)
: SET &TITLE# = GET_PROCESS_LINE(&HND#, 4)
: SET &IS_XML# = GET_PROCESS_LINE(&HND#, 5)
: SET &FILENAME# = GET_PROCESS_LINE(&HND#, 6)
: SET &ON_AGENT# = GET_PROCESS_LINE(&HND#, 7)
: SET &IN_DB# = GET_PROCESS_LINE(&HND#, 8)
: PRINT "Report type = &RH_TYPE#"
: PRINT "Start = &START_TIME#"
: PRINT "End = &END_TIME#"
: PRINT "Title = &TITLE#"
: PRINT "XML report? = &IS_XML#"
: PRINT "File name = &FILENAME#"
: PRINT "On the Agent? = &ON_AGENT#"
: PRINT "In the database? = &IN_DB#"
: IF &FILENAME# = ""
: PRINT "No external output file"
: ELSE
: IF &ON_AGENT# = 1
: PSET &FT_FILE# = &FILENAME#
: SET &MAIL# = SEND_MAIL("<RECEPIENT>",,"<SUBJECT>","<BODY>","&FT_FILE#",'<AGENT>','<LOGIN>')
: SET &AKT# = ACTIVATE_UC_OBJECT(<ANOTHER JOB>,,,,,PASS_VALUES,)
: ENDIF
: ENDIF
:ENDPROCESS
The LOGIN object must have type MAIL as an entry.
The other job needs to run on the same server as the SQL job and the user needs to have permissions over the temp folder of the SQL agent.