From cec36a2cda0b08eb3bb3523e721aca867610d649 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AD=A3=E9=9B=A8=E6=B4=81?= <2741227664@qq.com>
Date: Mon, 27 Feb 2023 09:20:02 +0000
Subject: [PATCH 1/2] =?UTF-8?q?=E5=AD=A3=E9=9B=A8=E6=B4=81?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: 季雨洁 <2741227664@qq.com>
---
 .../\344\275\234\344\270\232/2-23/work.js"    | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 "\345\255\243\351\233\250\346\264\201/\344\275\234\344\270\232/2-23/work.js"

diff --git "a/\345\255\243\351\233\250\346\264\201/\344\275\234\344\270\232/2-23/work.js" "b/\345\255\243\351\233\250\346\264\201/\344\275\234\344\270\232/2-23/work.js"
new file mode 100644
index 0000000..a03381d
--- /dev/null
+++ "b/\345\255\243\351\233\250\346\264\201/\344\275\234\344\270\232/2-23/work.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 con = mysql.createConnection({
+    host: "localhost", 
+    user: "root", 
+    password: "root",
+    port: "3306", 
+    database: "user"
+});
+con.connect();
+
+function way(){
+    let waysql1="SELECT count(1) AS '<18' FROM `user`  where age<18 ";
+    let waysql2="SELECT count(1) AS '>45' FROM `user`  where age>45 ";
+    let waysql3='SELECT count(1) AS "18~45" FROM `user`  where age>18 and age<45 ';
+    let waysql4='SELECT sex,count(1) as "数量",(SELECT COUNT(1) FROM `user`) as"总数" FROM `user` GROUP BY sex ;';
+ 
+
+    con.query(waysql4, (err, data) => {
+        console.log(err);
+        console.log(data);
+    });
+}
+way();
+
+con.end()
\ No newline at end of file
-- 
Gitee


From fe6ff02272aec6074f65325383df16879e275c43 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AD=A3=E9=9B=A8=E6=B4=81?= <2741227664@qq.com>
Date: Mon, 27 Feb 2023 09:20:50 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=E9=87=8D=E5=91=BD=E5=90=8D=20=E5=AD=A3?=
 =?UTF-8?q?=E9=9B=A8=E6=B4=81/=E4=BD=9C=E4=B8=9A/2-23=20=E4=B8=BA=20?=
 =?UTF-8?q?=E5=AD=A3=E9=9B=A8=E6=B4=81/=E4=BD=9C=E4=B8=9A/2-23.=E7=BB=9F?=
 =?UTF-8?q?=E8=AE=A1=E4=B8=AA=E6=95=B0=E4=BD=9C=E4=B8=9A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../work.js"                                                      | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename "\345\255\243\351\233\250\346\264\201/\344\275\234\344\270\232/2-23/work.js" => "\345\255\243\351\233\250\346\264\201/\344\275\234\344\270\232/2-23.\347\273\237\350\256\241\344\270\252\346\225\260\344\275\234\344\270\232/work.js" (100%)

diff --git "a/\345\255\243\351\233\250\346\264\201/\344\275\234\344\270\232/2-23/work.js" "b/\345\255\243\351\233\250\346\264\201/\344\275\234\344\270\232/2-23.\347\273\237\350\256\241\344\270\252\346\225\260\344\275\234\344\270\232/work.js"
similarity index 100%
rename from "\345\255\243\351\233\250\346\264\201/\344\275\234\344\270\232/2-23/work.js"
rename to "\345\255\243\351\233\250\346\264\201/\344\275\234\344\270\232/2-23.\347\273\237\350\256\241\344\270\252\346\225\260\344\275\234\344\270\232/work.js"
-- 
Gitee