From 3f2d8cd789516e0db3ea646f64e97c53e534a47c Mon Sep 17 00:00:00 2001
From: byd-android-2017 <17773406760@189.cn>
Date: Tue, 6 Sep 2022 13:23:41 +0800
Subject: [PATCH] Update aggtable.md (#995)
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新版实现AGG BY TO_MAP(cls,score) as (data)返回的数据类型是内建MAP类型，因此可以用键值对的方式直接访问，简单高效。
---
 .../extend/practice_guide/aggtable.md         | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/docs/versioned_docs/version-0.6/extend/practice_guide/aggtable.md b/docs/versioned_docs/version-0.6/extend/practice_guide/aggtable.md
index 6a4d757bdc..c754d3c645 100644
--- a/docs/versioned_docs/version-0.6/extend/practice_guide/aggtable.md
+++ b/docs/versioned_docs/version-0.6/extend/practice_guide/aggtable.md
@@ -341,14 +341,17 @@ FROM score
 GROUP BY sid
 AGG BY TO_MAP(cls,score) as (data);
 
-insert into studentscore
-select 
-a.sid,a.name,
-cast(GET_KEY(b.data,'chinese','0') as int),
-cast(GET_KEY(b.data,'math','0') as int),
-cast(GET_KEY(b.data,'english','0') as int)
-from student a
-left join aggscore2 b on a.sid=b.sid 
+insert into
+    studentscore
+select
+    a.sid,
+    a.name,
+    b.data['chinese'] ,
+    b.data['math'],
+    b.data['english']
+from
+    student a
+    left join aggscore2 b on a.sid = b.sid;
 ```
 
 ​	本实例通过表值聚合将分组后的多行转单列然后通过 GET_KEY 取值的思路来实现。同时，也使用了 Fragment 机制。