Practice Replace Employee ID With The Unique Identifier
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Replace Employee ID With The Unique Identifier
Tables: Employees(id INT, name VARCHAR); EmployeeUNI(id INT, unique_id INT). Employees.id is unique. EmployeeUNI has key (id, unique_id). Return unique_id and name for each employee. Keep employees with no matching identifier and display null for unique_id. Output order is unrestricted.
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Understanding the Replace Employee ID With The Unique Identifier Problem
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Problem Statement
Tables: Employees(id INT, name VARCHAR); EmployeeUNI(id INT, unique_id INT). Employees.id is unique. EmployeeUNI has key (id, unique_id). Return unique_id and name for each employee. Keep employees with no matching identifier and display null for unique_id. Output order is unrestricted.
Source: Replace Employee ID With The Unique Identifier on LeetCode. Use the original task for its coding environment and submissions.
Replace Employee ID With The Unique Identifier
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Examples
# Example 1
Employees table: +----+----------+ | id | name | +----+----------+ | 1 | Alice | | 7 | Bob | | 11 | Meir | | 90 | Winston | | 3 | Jonathan | +----+----------+ EmployeeUNI table: +----+-----------+ | id | unique_id | +----+-----------+ | 3 | 1 | | 11 | 2 | | 90 | 3 | +----+-----------+
+-----------+----------+ | unique_id | name | +-----------+----------+ | null | Alice | | null | Bob | | 2 | Meir | | 3 | Winston | | 1 | Jonathan | +-----------+----------+
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