diff --git "a/\351\202\223\351\230\263\345\265\230/\346\225\260\346\215\256\345\272\223/1.js" "b/\351\202\223\351\230\263\345\265\230/\346\225\260\346\215\256\345\272\223/1.js"
new file mode 100644
index 0000000000000000000000000000000000000000..1581df7b429ff6c415b7b6102075f0f91018b449
--- /dev/null
+++ "b/\351\202\223\351\230\263\345\265\230/\346\225\260\346\215\256\345\272\223/1.js"
@@ -0,0 +1,40 @@
+let mysql = require("mysql");
+let connection = mysql.createConnection({ host: "localhost", user: "root", password: "root", port: "3306", database: "user" });
+connection.connect();
+
+module.exports = {
+    //增
+    insert: function (User_name, User_age, User_sex) {
+        var createTime = new Date().toLocaleString().replace('/', '-').replace('/', '-');
+        let addsql = "INSERT into User (`User_name`,`User_age`,`User_sex`,`createTime`) value ('" + User_name + "','" + User_age + "','" + User_sex + "','" + createTime + "')";
+        connection.query(addsql, (err, data) => {
+            console.log(err);
+            console.log(data);
+        })
+    },
+    //删
+    delete: function (User_id) {
+        let del = "delete from user where `User_id`='" + User_id + "'";
+        connection.query(del, (err, data) => {
+            console.log(err);
+            console.log(data);
+        })
+    },
+    //改
+    update: function (User_name, User_age, User_sex) {
+        var updateTime = new Date().toLocaleString().replace('/', '-').replace('/', '-');
+        let update = "update `User` set `User_age`='" + User_age + "' ,`User_sex`='" + User_sex + "', `updateTime`='" + updateTime + "' where `User_name`='" + User_name + "'";
+        connection.query(update, (err, data) => {
+            console.log(err);
+            console.log(data);
+        })
+    },
+    //查
+    select: function (User_name) {
+        let sql = "select * from User where `User_name` = '" + User_name + "'";
+        connection.query(sql, (err, data) => {
+            console.log(err);
+            console.log(data);
+        });
+    }
+}
\ No newline at end of file
diff --git "a/\351\202\223\351\230\263\345\265\230/\346\225\260\346\215\256\345\272\223/use.js" "b/\351\202\223\351\230\263\345\265\230/\346\225\260\346\215\256\345\272\223/use.js"
new file mode 100644
index 0000000000000000000000000000000000000000..0508eb64f8f0378cfcc1b3e38fdc1c5f463fc84a
--- /dev/null
+++ "b/\351\202\223\351\230\263\345\265\230/\346\225\260\346\215\256\345\272\223/use.js"
@@ -0,0 +1,15 @@
+let mysql = require("mysql");
+let connection = mysql.createConnection({ host: "localhost", user: "root", password: "root", port: "3306", database: "user" });
+connection.connect();
+let use = require("./curd.js");
+
+//增(姓名，年龄，性别)
+// console.log(use.insert('','',''));
+// //删(id)
+// console.log(use.delete(''));
+//改(姓名，年龄，性别)
+console.log(use.update('老绿','66','女'));
+//查(姓名)
+// console.log(use.select(''));
+
+connection.end();
\ No newline at end of file
diff --git "a/\351\202\223\351\230\263\345\265\230/\346\265\201/1.js" "b/\351\202\223\351\230\263\345\265\230/\346\265\201/1.js"
new file mode 100644
index 0000000000000000000000000000000000000000..225c2477298d88622d9cee0a1c61bfa1c02f3add
--- /dev/null
+++ "b/\351\202\223\351\230\263\345\265\230/\346\265\201/1.js"
@@ -0,0 +1,38 @@
+let fs = require("fs");
+function createBigData() {
+    let str = "qwertyuioopasdfghjklzxcvbnm";
+    let fd = fs.openSync("./bigdata3.txt", "w");
+    for (let i = 0; i < 1000000; i++) {
+        let startAt = Math.floor(Math.random() * (str.length));
+        let endAt = Math.floor(Math.random() * (str.length));
+        if (startAt > endAt) {
+            let tem = startAt;
+            startAt = endAt;
+            endAt = tem;
+        }
+        if (startAt == endAt) continue;
+
+        let temStr = str.slice(startAt, endAt);
+        fs.writeSync(fd, temStr);
+    }
+    fs.closeSync(fd);
+}
+
+
+let readStream = fs.createReadStream("./bigdata3.txt");
+let array = [];
+readStream.on("data", (chunk) => {
+    let str = chunk.toString();
+    for (let i = 0; i < str.length; i++) {
+        if (array[str[i]] == undefined) {
+            array[str[i]] = 1;
+        } else {
+            array[str[i]] += 1;
+        }
+    }
+});
+
+readStream.on("end",()=>{
+    console.log(array);
+})
+