From c6aee484d917104ec2ad2234f2f7e06524f6b621 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=90=B4=E6=88=90=E6=9D=B0?= <2756262977@qq.com>
Date: Wed, 25 May 2022 04:29:36 +0000
Subject: [PATCH] 6

---
 ...01\345\210\240\343\200\201\346\224\271.md" | 69 +++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 "\345\220\264\346\210\220\346\235\260/20220520-\345\242\236\343\200\201\345\210\240\343\200\201\346\224\271.md"

diff --git "a/\345\220\264\346\210\220\346\235\260/20220520-\345\242\236\343\200\201\345\210\240\343\200\201\346\224\271.md" "b/\345\220\264\346\210\220\346\235\260/20220520-\345\242\236\343\200\201\345\210\240\343\200\201\346\224\271.md"
new file mode 100644
index 0000000..8623d49
--- /dev/null
+++ "b/\345\220\264\346\210\220\346\235\260/20220520-\345\242\236\343\200\201\345\210\240\343\200\201\346\224\271.md"
@@ -0,0 +1,69 @@
+# 作业
+
+### 数据库创建
+
+```html
+create database student charset utf8;
+use student;
+
+create table user(
+id int primary key auto_increment,
+name varchar(20) not null,
+score decimal(2,1) not null
+);
+```
+
+### php查询
+
+```php+HTML
+<?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 ('张三',98.5),('李四',75.5),('王五',60)";
+$re = mysqli_query($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);
+```
\ No newline at end of file
-- 
Gitee