From 99f28cbb6be4f335fee3e4ec235b7057f33f129e Mon Sep 17 00:00:00 2001
From: Mars Liu <mars.liu@outlook.com>
Date: Thu, 9 Jun 2022 20:01:18 +0800
Subject: [PATCH] convert

---
 .../config.json"                              |  6 ++-
 .../convert.json"                             |  7 +++
 .../convert.md"                               | 48 +++++++++++++++++++
 data/tree.json                                |  3 +-
 4 files changed, 61 insertions(+), 3 deletions(-)
 create mode 100644 "data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/convert.json"
 create mode 100644 "data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/convert.md"

diff --git "a/data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/config.json" "b/data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/config.json"
index 460272b..be5b840 100644
--- "a/data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/config.json"
+++ "b/data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/config.json"
@@ -2,11 +2,13 @@
   "node_id": "mysql-df29b082d5364530b95bbdc14adc107e",
   "keywords": [
     "函数",
-    "cast"
+    "cast",
+    "convert"
   ],
   "children": [],
   "export": [
-    "cast.json"
+    "cast.json",
+    "convert.json"
   ],
   "keywords_must": [],
   "keywords_forbid": [],
diff --git "a/data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/convert.json" "b/data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/convert.json"
new file mode 100644
index 0000000..606fa78
--- /dev/null
+++ "b/data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/convert.json"
@@ -0,0 +1,7 @@
+{
+  "type": "code_options",
+  "author": "ccat",
+  "source": "convert.md",
+  "notebook_enable": false,
+  "exercise_id": "a152ea2ab0c5410fa2d2b808afd063ae"
+}
\ No newline at end of file
diff --git "a/data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/convert.md" "b/data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/convert.md"
new file mode 100644
index 0000000..c63e469
--- /dev/null
+++ "b/data/2.MySQL\344\270\255\351\230\266/3.\345\206\205\347\275\256\345\207\275\346\225\260/5.\345\205\266\345\256\203\345\207\275\346\225\260/convert.md"
@@ -0,0 +1,48 @@
+# 编码转换
+
+Joe 需要将下面这个查询
+
+```mysql
+select name from goods;
+```
+
+中的 name 字段的字符集改为 gb 18030，他应该怎么做？
+
+##  答案
+
+```mysql
+select convert(name using 'gb18030') from goods;
+```
+
+## 选项
+
+
+### A
+
+```mysql
+select str(name, 'gb18303') from goods;
+```
+
+
+### B
+
+```mysql
+select encode(decode(name, 'utf8mb4'), 'gb18303') from goods;
+```
+
+
+### C
+
+```mysql
+select convert(name from 'utf8mb4' to 'gb18303') from goods;
+```
+
+### D
+
+```mysql
+select convert(name to 'gb18303') from goods;
+```
+
+### E
+
+所有都错
\ No newline at end of file
diff --git a/data/tree.json b/data/tree.json
index c28a839..4f86682 100644
--- a/data/tree.json
+++ b/data/tree.json
@@ -958,7 +958,8 @@
                       "node_id": "mysql-df29b082d5364530b95bbdc14adc107e",
                       "keywords": [
                         "函数",
-                        "cast"
+                        "cast",
+                        "convert"
                       ],
                       "children": [],
                       "keywords_must": [],
-- 
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