How to Solve Replace Employee I D With The Unique Identifier Problem
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Replace Employee ID With The Unique Identifier
Table: Employees +---------------+---------+ | Column Name | Type | +---------------+---------+ | id | int | | name | varchar | +---------------+---------+ id is the prima...
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Understanding the Replace Employee I D With The Unique Identifier Problem
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Problem Statement
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. The result format is in the following example.
Replace Employee ID With The Unique Identifier
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Examples
Example inputExample outputAlice and Bob do not have a unique ID, We will show null instead. The unique ID of Meir is 2. The unique ID of Winston is 3. The unique ID of Jonathan is 1.
Constraints
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