Problems With Saving MySQL Query With Batch File - mysql

Question

I initially labeled this something different but then figured out my problem, but a different problem came up so now I'm editing this some.
First off let me start. I'm not a "coder" and everything I'm doing is all from research. What I'm trying to accomplish is running a batch file on a loop. It connects to MySQL on my VPS just fine. It will then save the return of the MySQL command to text file when information is there. The problem is when there isn't new information in the database, it just saves it as a blank text file. I would rather have it not save to text at all if there's no information on the DB. This is what I have so far. I'm also running this on Windows Server 2008.
#echo off
:loop
timeout /T 5
mysql --host=111.11.111.11 --port=3306 --user=user_name --password=password --database=db_name --execute="SELECT * FROM tablename LIMIT 1" > results.txt
if exist c:\users\administrator\desktop\results.txt goto end
goto loop
:END
start program.exe
exit
So what I need is something that saves to text if the MySQL command returns information, but if the MySQL command returns empty it continually does the loop until something is there.

Answer 1

Have you tried to save the result to a variable and do a check?
#echo off
:loop
timeout /T 5
Myans = mysql --host=111.11.111.11 --port=3306 --user=user_name --password=password --database=db_name -- execute="SELECT * FROM tablename LIMIT 1"
if not %Myans%=="" ( Myans >> results.txt )
if exist c:\users\administrator\desktop\results.txt goto end
goto loop
:END
start program.exe
exit