How to count files in a folder

Hello!
I have a folder with .txt files. If the file name is STRING i need to count all .txt files whose file names contain "STRING".
For example, if there are STRING.txt, STRING1.txt,STRING2.txt.... in the folder, i need to find out how many of .txt files are there, where substr(filename,0,6)='STRING'
How can i do this?
Cheers
A.

if it's windows, then this will count the files
for /f "usebackq tokens=1,2" %i in ( `dir STRING` ) do if '%j'=='File(s)' set file_cnt=%i
[pre]
the variable "file_cnt" will have the answer.
or the "set" command above could just be an "echo".
and of course, in order to do this from pl/sql, you'll need java.
you could even change the "set" to an "exit", and the
file count will be returned as the exit status.

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For detailed information, please refer to the BI 4.0 developers guide here.
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