spelling mistake

Author: MichaelAdrianJohnson

articles/stream-analytics/stream-analytics-stream-analytics-query-patterns.md

@@ -109,7 +109,7 @@ For more information, see [**WITH** clause](/stream-analytics-query/with-azure-s
 
 ## Simple pass-through query
 
-A simple pass-through query can be used to copy the input stream data into the output. For example, if a stream of data containing real-time vehicle information needs to be saved in a SQL database for letter analysis, a simple pass-through query will do the job.
+A simple pass-through query can be used to copy the input stream data into the output. For example, if a stream of data containing real-time vehicle information needs to be saved in a SQL database for later analysis, a simple pass-through query will do the job.
 
 **Input**: