task: #1378

Author: Ivanbyone

README.md

@@ -49,6 +49,7 @@ Have a good contributing!
     - [620. Not Boring Movies](./leetcode/easy/620.%20Not%20Boring%20Movies.sql)
     - [1068. Product Sales Analysis I](./leetcode/easy/1068.%20Product%20Sales%20Analysis%20I.sql)
     - [1327. List the Products Ordered in a Period](./leetcode/easy/1327.%20List%20the%20Products%20Ordered%20in%20a%20Period.sql)
+    - [1378. Replace Employee ID With The Unique Identifier](./leetcode/easy/1378.%20Replace%20Employee%20ID%20With%20The%20Unique%20Identifier.sql)
     - [1407. Top Travellers](./leetcode/easy/1407.%20Top%20Travellers.sql)
     - [1484. Group Sold Products By The Date](./leetcode/easy/1484.%20Group%20Sold%20Products%20By%20The%20Date.sql)
     - [1587. Bank Account Summary II](./leetcode/easy/1587.%20Bank%20Account%20Summary%20II.sql)

leetcode/easy/1378. Replace Employee ID With The Unique Identifier.sql

@@ -0,0 +1,41 @@
+/*
+Question 1378. Replace Employee ID With The Unique Identifier
+Link: https://leetcode.com/problems/replace-employee-id-with-the-unique-identifier/description/
+
+Table: Employees
+
++---------------+---------+
+| Column Name   | Type    |
++---------------+---------+
+| id            | int     |
+| name          | varchar |
++---------------+---------+
+id is the primary key (column with unique values) for this table.
+Each row of this table contains the id and the name of an employee in a company.
+ 
+
+Table: EmployeeUNI
+
++---------------+---------+
+| Column Name   | Type    |
++---------------+---------+
+| id            | int     |
+| unique_id     | int     |
++---------------+---------+
+(id, unique_id) is the primary key (combination of columns with unique values) for this table.
+Each row of this table contains the id and the corresponding unique id of an employee in the company.
+ 
+
+Write a solution to show the unique ID of each user, If a user does not have a unique ID replace just show null.
+
+Return the result table in any order.
+*/
+
+SELECT 
+    eu.unique_id,
+    e.name
+FROM Employees AS e
+LEFT JOIN
+    EmployeeUNI AS eu
+    ON e.id = eu.id
+