Update index.md

Author: ianzeng217

docs/04_visualizations/2-2-line/index.md

@@ -27,15 +27,7 @@ sidebar_position: 2.2
 ### 数据示例
 
 ```py
-# 创建 DataFrame
-data = query('select * from yearly.a0301')
-
-# 转换为 DataFrame
-df = DataFrame(data)
-
-df = df.pivot(index="day", columns="name", values="value")
-
-return df
+select toDateTime(Time/1000) as Time, * from klines.spot_1d where Symbol = 'btc_usdt' and Exchange = 'Binance' order by Time limit 100
 ```