From da4de6133309e422370812f6ef5b03eddfd7b11f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E8=90=83?= <1941538655@qq.com>
Date: Tue, 7 Mar 2023 08:19:35 +0000
Subject: [PATCH 1/2] =?UTF-8?q?=E7=8E=8B=E8=90=83?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: 王萃 <1941538655@qq.com>
---
 .../2.23/zy.js"                               | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 "\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.23/zy.js"

diff --git "a/\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.23/zy.js" "b/\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.23/zy.js"
new file mode 100644
index 0000000..09a267d
--- /dev/null
+++ "b/\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.23/zy.js"
@@ -0,0 +1,28 @@
+// 作业：实现分页,能实现男女个数和总数的统计,能统计出（小于等于18） 和 18-45 和 45岁以上的人数
+// （可以的话一条sql,分组,使用占位符的形式去写）
+let mysql = require("mysql");
+let connection = mysql.createConnection({host: "127.0.0.1",user: "root",password: "root",database: "users"});
+connection.connect();
+
+let a = getNum(1,3);
+let b = 3;
+let sql = "select * from db_users limit ?,?";
+console.log(sql);
+connection.query(sql,[a,b],(err,data) =>{
+    console.log(err,data);
+});
+
+let sql1 = "SELECT sex, COUNT(sex) as 人数,(select count(sex) from db_users) FROM `db_users` GROUP BY sex";
+connection.query(sql1,(arr,data)=>{
+    console.log(err,data);
+});
+
+let sql2 = "SELECT distinct (SELECT COUNT(sex) as 小于18 FROM `db_users` WHERE age <18) as 小于18, (SELECT COUNT (sex) as 18到45 FROM `db_users` WHERE age BETWEEN 18 AND 45) as 18到45,(SELECT COUNT(sex) as 大于45 FROM `db_users` WHERE age>45) as 大于45 FROM `db_users`";
+connection.query(sql2,(err,data)=>{
+    console.log(err,data);
+});
+
+connection.end();
+function getNum(page,num){
+    return (page-1)*num;
+};
-- 
Gitee


From 742ea286eb3180f95d4ff0be75f51700f657bc88 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E8=90=83?= <1941538655@qq.com>
Date: Tue, 28 Mar 2023 06:47:21 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=E7=8E=8B=E8=90=83?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: 王萃 <1941538655@qq.com>
---
 .../2.27/config.js"                           |  8 +++
 .../2.27/zy.js"                               | 69 +++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100644 "\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.27/config.js"
 create mode 100644 "\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.27/zy.js"

diff --git "a/\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.27/config.js" "b/\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.27/config.js"
new file mode 100644
index 0000000..88a0ea9
--- /dev/null
+++ "b/\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.27/config.js"
@@ -0,0 +1,8 @@
+let database = {
+    host: "127.0.0.1",
+    user: "root",
+    password: "root",
+    port: 3306,
+    database: 'student'
+}
+module.exports = database
\ No newline at end of file
diff --git "a/\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.27/zy.js" "b/\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.27/zy.js"
new file mode 100644
index 0000000..437fa90
--- /dev/null
+++ "b/\347\216\213\350\220\203/\346\250\241\345\235\227\344\275\234\344\270\2322.15/2.27/zy.js"
@@ -0,0 +1,69 @@
+// ### 作业：创建一个学生表,里面有班级字段,里面最好有自己班上同学姓名,
+// 其它班级的姓名随机写,有个字段存储游戏的分值,先实现随机的数值写入,
+// 查询出各班级前三名的学生
+let config = require('./config');
+const {Sequelize,Model,DataTypes}=require('sequelize');
+const { random } = require('lodash');
+
+const sequelize = new Sequelize(config.database,config.user,config.password,{
+    
+    dialect:'mysql',
+    host:config.host,
+    port:config.port,
+    logging:true,
+    timezone:'+08:00',
+    define:{
+        timestamps:false,
+        underscored:true,
+        deletedAt:false
+    }
+});
+
+
+class score1 extends Model {};
+score1.init({
+    id:{
+        type:DataTypes.INTEGER,
+        allowNull:false,
+        primaryKey:true,
+        autoIncrement:true,
+    },
+    name:{
+        type:DataTypes.STRING
+    },
+    class:{
+        type:DataTypes.STRING
+    },
+    score:{
+        type:DataTypes.STRING
+    }
+},{
+    sequelize,
+    modelName:'score',
+    tableName:'score',
+})
+
+//写入
+setTimeout(function(){
+    var score2 = Math.round(Math.random()*100)
+    let user = score1.build({class:'6',name:'刘',score:score2})
+    user.save();
+    console.log("写入成功");
+},3000)
+
+
+
+
+
+score1.findAll({
+    where:{
+        class:7
+    },
+    order:[
+        ['score','DESC']
+    ],
+    limit:3
+}).then(score => {
+    console.log(JSON.stringify(score,null,4));
+})
+
-- 
Gitee