@UNQKVS[[u,]filename,"key","value"] : Add a key value pair to a UnQlite database.
|u||Optional flag that the key and value are Unicode (UTF16)|
|filename||Database opened with @UNQOPEN|
|key||Key to add or replace|
|value||Value to add|
Returns 0 if successful, or the error text if not.
This example opens a database named "test.db", writes a key and value to the database, and then reads it back.
echo Testing file write and read
echo %@unqkvs[test.db,"key1","This is the value for our first key"]