diff --git a/sql/clever_avg.sql b/sql/clever_avg.sql
index cf655f7a353149b311918034a41cea72260b5ce3..ce6d6079634ef08fa95fe6bc170ee96e67e96c02 100644
--- a/sql/clever_avg.sql
+++ b/sql/clever_avg.sql
@@ -1 +1 @@
-select sum(trade.trade_price*trade_volume)/sum(trade_volume) as average_price from tb_trade
\ No newline at end of file
+select avg(trade.trade_price) as average_price from tb_trade
\ No newline at end of file