diff --git "a/\351\231\210\346\242\201\346\235\260/20220523-\346\225\260\346\215\256\345\272\223\350\277\236\346\216\245.md" "b/\351\231\210\346\242\201\346\235\260/20220523-\346\225\260\346\215\256\345\272\223\350\277\236\346\216\245.md"
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index 0000000000000000000000000000000000000000..5f8674858e0db8c57c960a4c6b87485df98adf32
--- /dev/null
+++ "b/\351\231\210\346\242\201\346\235\260/20220523-\346\225\260\346\215\256\345\272\223\350\277\236\346\216\245.md"
@@ -0,0 +1,82 @@
+创建数据库：
+
+```mysql
+create database student charset utf8;
+use student;
+
+
+
+create table user(
+id int auto_increment primary key,
+name varchar(20) not null,
+score decimal(2,1) not null
+
+);
+
+
+
+
+```
+
+数据库查询：
+
+```php
+<?php
+
+
+error_reporting(E_ALL ^ E_WARNING);
+$db = mysqli_connect("127.0.0.1", "root", "root", "student");
+
+if (!$db) {
+    echo "连接失败" . mysqli_connect_error();
+    die();
+}
+
+// set names utf8;
+mysqli_query($db, 'set names utf8');
+$ins = "insert into `user`(`name`,`score`) values ('陈小龙',98.5),('吴大虫',75.5),('陈得胜',66)";
+$re = mysqli_query($db, $ins);
+
+if (!$re) {
+
+    die("插入失败" . mysqli_error($db));
+}
+
+
+$dele = "delete from `user` where `id`=3";
+$re_dele = mysqli_query($db, $dele);
+
+if (!$re_dele) {
+    die("删除失败" . mysqli_error($db));
+}
+
+$up = "update `user` set `name`='小明' where  `id`=1";
+$re_up = mysqli_query($db, $up);
+
+if (!$re_up) {
+    die("更新失败" . mysqli_error($db));
+}
+
+
+
+$select = "select * from `user`";
+$re_select = mysqli_query($db, $select);
+if (!$re_select) {
+    die("出错了" . mysqli_error($db));
+}
+mysqli_query($db,"set names utf8");
+
+while ($arr = mysqli_fetch_assoc($re_select)) {
+    echo $arr['id'].$arr['name'].$arr['score']."<br>";
+
+}
+
+
+mysqli_close($db);
+
+
+
+```
+
+
+