Update app.py

app.py

@@ -144,7 +144,7 @@ def sql_engine(query: str) -> str:
             rows = con.execute(text(query)).fetchall()
         if not rows:
             return "No results found."
-        if len(rows) 1 and len(rows[0]) 1:
+        if len(rows) == 1 and len(rows[0]) == 1:  # Fixed the comparison operators here
             return str(rows[0][0])
         return "\n".join([", ".join(map(str, row)) for row in rows])
     except Exception as e: