function and procedure

data/2.MySQL中阶/6.子查询/1.相关子查询/subquery.json

 {
   "type": "code_options",
-  "author": "Mars Liu",
+  "author": "ccat",
   "source": "subquery.md",
   "notebook_enable": false,
   "exercise_id": "2fabb69f22224e48a26fec8911798ceb"

data/2.MySQL中阶/7.视图/1.视图的基本概念/view.json

 {
   "type": "code_options",
-  "author": "Mars Liu",
+  "author": "ccat",
   "source": "view.md",
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data/2.MySQL中阶/7.视图/2. 创建视图/create_view.json

 {
   "type": "code_options",
-  "author": "Mars Liu",
+  "author": "ccat",
   "source": "create_view.md",
   "notebook_enable": false,
   "exercise_id": "990e457f98db463b9fe14831f6ab2afc"

data/2.MySQL中阶/7.视图/3. 修改视图/alter_view.json

 {
   "type": "code_options",
-  "author": "Mars Liu",
+  "author": "ccat",
   "source": "alter_view.md",
   "notebook_enable": false,
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data/2.MySQL中阶/7.视图/4. 删除视图/drop_view.json

 {
   "type": "code_options",
-  "author": "Mars Liu",
+  "author": "ccat",
   "source": "drop_view.md",
   "notebook_enable": false,
   "exercise_id": "3ef595b611414ae7957ffa93a91a5b99"

data/2.MySQL中阶/8.存储过程和函数/1.存储过程和函数简介/config.json

@@ -2,7 +2,9 @@
   "node_id": "mysql-0666cae9faaa41b7b2413063e1214edd",
   "keywords": [],
   "children": [],
-  "export": [],
+  "export": [
+    "tax.json"
+  ],
   "keywords_must": [],
   "keywords_forbid": [],
   "group": 0

data/2.MySQL中阶/8.存储过程和函数/1.存储过程和函数简介/tax.json

+{
+  "type": "code_options",
+  "author": "ccat",
+  "source": "tax.md",
+  "notebook_enable": false,
+  "exercise_id": "bc846ce638304b27a51ae20299120b98"
+}
\ No newline at end of file

data/2.MySQL中阶/8.存储过程和函数/1.存储过程和函数简介/tax.md

+# 个人所得税计算
+
+个人所得税的计算需要进行若干指标的求和，然后基于分段的基数和系数计算得到扣税金额。
+因此 Joe 准备用一个存储过程或函数将个人所得税计算封装起来，供团队使用，那么，下列
+措施中哪一项是错误的？
+
+## 答案
+
+通过 `create function iitax(amount decimal(12, 4), out tax decimal(12, 4)， out rest decimal(12, 4)) ` 
+定义个人所得税计算函数。
+
+## 选项
+
+### A
+
+通过 `create function iitax(amount decimal(12, 4)) returns decimal(12, 4)` 定义个人所得税计算函数。
+
+### B
+
+通过 `create procedure(amount decimal(12, 4), out tax decimal(12, 4)， out rest decimal(12, 4))` 
+定义计算过程，将税金和剩余金额通过 out 参数传递出来。
+
+### C
+
+通过 `select iitax(amount)` 可以调用 iitax 函数得到所得税金额。
+
+
+### D
+
+通过 `call iitax(amount, @tax, @rest)` 可以求得 amount 对应的个人所得税金额，
+并将税额和剩余金额保存在 `@tax` 和 `@rest` 变量中。 
\ No newline at end of file

data/3.MySQL高阶/3.SQL高级技巧/4.Double Not Exists/DoubleNotExists.json

 {
   "type": "code_options",
-  "author": "Mars Liu",
+  "author": "ccat",
   "source": "DoubleNotExists.md",
   "notebook_enable": false,
   "exercise_id": "b9381a1d56da4de0862f5a8d3c7bb59a"

data/3.MySQL高阶/7.查询优化/2.OR子句优化/config.json

-{
-  "node_id": "mysql-5e5c02582f1641ada50c92161d0e0587",
-  "keywords": [],
-  "children": [],
-  "export": [],
-  "keywords_must": [],
-  "keywords_forbid": [],
-  "group": 0
-}
\ No newline at end of file

data/3.MySQL高阶/7.查询优化/5.GROUP BY优化/config.json → data/3.MySQL高阶/7.查询优化/4.GROUP BY优化/config.json

 {
   "node_id": "mysql-66fc4566eaf34994b072ca83bf79ceb4",
-  "keywords": [],
+  "keywords": ["performance", "优化", "group by"],
   "children": [],
   "export": [],
   "keywords_must": [],

data/3.MySQL高阶/8.写优化/1.插入优化/bulk_insert.json

 {
   "type": "code_options",
-  "author": null,
+  "author": "Mars",
   "source": "bulk_insert.md",
   "notebook_enable": false,
   "exercise_id": "936ee1ecbd4a4b9aa795fa537e24f659"

data/3.MySQL高阶/8.写优化/2.删除优化/performance_delete.json

 {
   "type": "code_options",
-  "author": null,
+  "author": "Mars",
   "source": "performance_delete.md",
   "notebook_enable": false,
   "exercise_id": "105bda06ce03418aaad1422b61767cb6"

data/3.MySQL高阶/9.服务器优化/1.配置项优化/configuration.json

 {
   "type": "code_options",
-  "author": null,
+  "author": "Mars",
   "source": "configuration.md",
   "notebook_enable": false,
   "exercise_id": "b90270843de54822a1556cb47ca49394"

data/3.MySQL高阶/9.服务器优化/2.performance_schema/performance_schema.json

 {
   "type": "code_options",
-  "author": null,
+  "author": "Mars",
   "source": "performance_delete.md",
   "notebook_enable": false,
   "exercise_id": "cea8e3db523b4f1fb9a502e1d9c27d7b"

data/3.MySQL高阶/9.服务器优化/3.sys数据库/sys.json

 {
   "type": "code_options",
-  "author": null,
+  "author": "Mars",
   "source": "sys.md",
   "notebook_enable": false,
   "exercise_id": "ed53fabf084c4ceb99952f5196412b49"