diff --git "a/\345\217\266\346\200\235\346\200\235/200220518-\346\226\207\344\273\266\344\270\212\344\274\240.md" "b/\345\217\266\346\200\235\346\200\235/20220518-\346\226\207\344\273\266\344\270\212\344\274\240.md"
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@@ -0,0 +1,73 @@
+```mysql
+#建立student数据库
+create database student charset utf8;
+use student;
+#建立user信息表
+create table user(
+id int primary key auto_increment,
+name varchar(20) not null,
+score decimal(5,2) not null
+);
+```
+
+```php
+<?php
+error_reporting(E_ALL^E_WARNING);
+$con=mysqli_connect('localhost','root','root','student');
+if (!$con){
+    die("连接失败，出现错误".mysqli_connect_error());
+}else{
+    echo "连接成功";
+}
+echo "<br>";
+
+//添加数据
+mysqli_query($con,'set name utf8');//为了让添加的数据不会乱码
+$tt="insert into `user`(`name`,`score`) values('陈小龙',98.5),('陈大虫',75.5),('陈得胜',66)";
+$result=mysqli_query($con,$tt);
+if ($result){
+    echo "添加数据成功";
+}else{
+    die("添加数据失败，出现错误：".mysqli_error($con));
+}
+echo "<br>";
+
+//增加数据
+$zz="insert into `user`(`name`,`score`) value('张三',88)";
+$result=mysqli_query($con,$zz);
+if ($result){
+    echo "增加数据成功";
+}else{
+    die("增加数据失败，出现错误：".mysqli_error($con));
+}
+echo "<br>";
+
+//修改数据
+$xx="update `user` set `name`='李四' where id=1";
+$result=mysqli_query($con,$xx);
+if ($result){
+    echo "修改数据成功";
+}else{
+    die("修改数据失败，出现错误：".mysqli_error($con));
+}
+echo "<br>";
+
+//删除数据
+$ss="delete from `user` where id>3";
+$result=mysqli_query($con,$ss);
+if ($result){
+    echo "删除数据成功";
+}else{
+    die("删除数据失败，出现错误".mysqli_error($con));
+}
+echo "<br>";
+
+//查找数据
+$cc="select * from `user`";
+$result=mysqli_error($con,$cc) or die("查找数据失败，出现错误".mysqli_error($con));
+while ($aa=mysqli_fetch_assoc($result)){
+    echo $aa['id']." ".$aa['name']." ".$aa['score'];
+}
+
+```
+