remove limit clause from prompt for compatibility with ms sql server (#1385)

For reference see:
8a35811556

Co-authored-by: Francisco Ingham <>

langchain/agents/agent_toolkits/sql/prompt.py

@@ -2,7 +2,7 @@
 
 SQL_PREFIX = """You are an agent designed to interact with a SQL database.
 Given an input question, create a syntactically correct {dialect} query to run, then look at the results of the query and return the answer.
-Unless the user specifies a specific number of examples they wish to obtain, always limit your query to at most {top_k} results using the LIMIT clause.
+Unless the user specifies a specific number of examples they wish to obtain, always limit your query to at most {top_k} results.
 You can order the results by a relevant column to return the most interesting examples in the database.
 Never query for all the columns from a specific table, only ask for a the few relevant columns given the question.
 You have access to tools for interacting with the database.