makeup exercises

data/2.PostgreSQL中阶/2.服务端编程/7.DDL/config.json

@@ -4,6 +4,6 @@
   "children": [],
   "export": [
     "create_table.json",
-    "anylze.json"
+    "analyze.json"
   ]
 }
\ No newline at end of file

data/3.PostgreSQL高阶/2.高级数据类型/1.几何类型和GIS/config.json

 {
   "node_id": "pg-3bbe12c0a19d4cb7a61dc0a20624ed89",
-  "keywords": [],
+  "keywords": ["gis", "地理信息"],
   "children": [],
-  "export": []
+  "export": ["gis.json"]
 }
\ No newline at end of file

data/3.PostgreSQL高阶/2.高级数据类型/1.几何类型和GIS/gis.json

+{
+  "type": "code_options",
+  "author": "刘鑫",
+  "source": "gis.md",
+  "notebook_enable": false,
+  "exercise_id": "88b033cd97c642ef9900e5e091e335ff"
+}
\ No newline at end of file

data/3.PostgreSQL高阶/2.高级数据类型/1.几何类型和GIS/gis.md

+# 邻近查找
+
+我们有一个简化的表结构如下：
+
+```postgresql
+create table city
+(
+    id   serial8,
+    city text,
+    poi  point
+);
+create index idx_tbl_point on city using gist (poi) with (buffering = on);
+```
+
+要查找给定的点位于哪个城市，或者离哪个城市最近，应该是下列哪一项？
+
+## 答案
+
+```postgresql
+select city, poi <-> point($1, $2) dist
+from city
+where poi <-> point($1, $2) < 100
+order by poi <-> point($1, $2)
+limit 1;
+```
+
+## 选项
+
+### A
+
+```postgresql
+select city, poi <-> point($1, $2) dist
+from city
+where poi <-> point($1, $2) < 100
+order by poi <-> point($1, $2) desc
+limit 1;
+```
+
+### B
+
+```postgresql
+select *, poi <-> point($1, $2) dist
+from city
+where poi <-> point($1, $2) < 100
+limit 1;
+```
+
+### C
+
+```postgresql
+select *, poi - point($1, $2) dist
+from city
+where poi - point($1, $2) < 100
+order by poi - point($1, $2)
+limit 1;
+```
+
+### D
+
+```postgresql
+select *, abs(poi - point($1, $2)) dist
+from city
+where abs(poi - point($1, $2)) < 100
+order by abs(poi - point($1, $2))
+limit 1;
+```
\ No newline at end of file

data/tree.json

@@ -211,7 +211,11 @@
                   {
                     "DDL": {
                       "node_id": "pg-0378bcd60ccd4dfebcfead92abbdd673",
-                      "keywords": [],
+                      "keywords": [
+                        "创建表",
+                        "授权",
+                        "ddl"
+                      ],
                       "children": []
                     }
                   }
@@ -263,7 +267,10 @@
                   {
                     "几何类型和GIS": {
                       "node_id": "pg-3bbe12c0a19d4cb7a61dc0a20624ed89",
-                      "keywords": [],
+                      "keywords": [
+                        "gis",
+                        "地理信息"
+                      ],
                       "children": []
                     }
                   },