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src/app/api.py

@@ -53,16 +53,14 @@ DEFAULT_DB_PATH = str(
 )
 
 EXAMPLE_QUESTIONS = [
-    "How many orders were placed in 2024?",
-    "What is the total revenue from completed orders?",
-    "List the top 5 best-selling products by total quantity sold.",
+    "How many orders are there in total?",
+    "Show the number of orders by status.",
     "Which city has the most customers?",
-    "Show the number of orders per store, ordered from highest to lowest.",
-    "What is the average order value (sum of quantity times unit_price) for completed orders?",
-    "Which product category generates the highest total revenue?",
-    "List all customers from Hanoi who placed at least one order.",
-    "Show monthly order counts for 2024.",
-    "What products have stock below 10 units at any store?",
+    "What are the 5 most expensive products?",
+    "How many customers are from hanoi?",
+    "How many completed orders are there?",
+    "What is the average product price?",
+    "List all stores in the north region.",
 ]
 
 def _default_active():
@@ -214,6 +212,19 @@ def upload(file: UploadFile):
     )
 
 
+@app.get("/api/preview")
+def preview_table(table: str = ""):
+    """Return rows from a specific table (or first available) for the active database."""
+    db_path = _active["db_path"]
+    table_names = csv_loader.get_table_names(db_path)
+    if not table_names:
+        return {"table_names": [], "active_table": "", "columns": [], "rows": [], "row_count": 0, "truncated": False}
+    if table not in table_names:
+        table = table_names[0]
+    preview = csv_loader.get_preview_for_table(db_path, table)
+    return {"table_names": table_names, "active_table": table, **preview}
+
+
 @app.post("/api/reset")
 def reset():
     """Quay lai database mac dinh (retail_store). Giu nguyen model_id nguoi