diff --git "a/\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" "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"
new file mode 100644
index 0000000000000000000000000000000000000000..a03381d6e5b1baa400aecb22d3b5e4a200aeed95
--- /dev/null
+++ "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"
@@ -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