This SQL statement is combining the results of two SELECT queries using the UNION operator.

Here's a step-by-step breakdown:

1. `SELECT employee_id FROM employees`: This part of the statement selects the `employee_id` from the `employees` table. It will return a list of `employee_id`s of current employees.

2. `SELECT employee_id FROM former_employees`: This part of the statement selects the `employee_id` from the `former_employees` table. It will return a list of `employee_id`s of former employees.

3. `UNION`: This is a set operator that combines the results of the two SELECT statements. It removes duplicate rows from the final result set.

So, the entire statement `SELECT employee_id FROM employees UNION SELECT employee_id FROM former_employees;` will return a list of `employee_id`s from both the `employees` and `former_employees` tables, with any duplicates removed. This means you'll get a list of `employee_id`s of all individuals who are either current or former employees.

Question

This SQL statement is combining the results of two SELECT queries using the UNION operator.

Here's a step-by-step breakdown:

1. `SELECT employee_id FROM employees`: This part of the statement selects the `employee_id` from the `employees` table. It will return a list of `employee_id`s of current employees.

2. `SELECT employee_id FROM former_employees`: This part of the statement selects the `employee_id` from the `former_employees` table. It will return a list of `employee_id`s of former employees.

3. `UNION`: This is a set operator that combines the results of the two SELECT statements. It removes duplicate rows from the final result set.

So, the entire statement `SELECT employee_id FROM employees UNION SELECT employee_id FROM former_employees;` will return a list of `employee_id`s from both the `employees` and `former_employees` tables, with any duplicates removed. This means you'll get a list of `employee_id`s of all individuals who are either current or former employees.

Knowee AI · Accepted Answer

This SQL statement is combining the results of two SELECT queries using the UNION operator.

Here's a step-by-step breakdown:

1. `SELECT employee_id FROM employees`: This part of the statement selects the `employee_id` from the `employees` table. It will return a list of `employee_id`s of current employees.

2. `SELECT employee_id FROM former_employees`: This part of the statement selects the `employee_id` from the `former_employees` table. It will return a list of `employee_id`s of former employees.

3. `UNION`: This is a set operator that combines the results of the two SELECT statements. It removes duplicate rows from the final result set.

So, the entire statement `SELECT employee_id FROM employees UNION SELECT employee_id FROM former_employees;` will return a list of `employee_id`s from both the `employees` and `former_employees` tables, with any duplicates removed. This means you'll get a list of `employee_id`s of all individuals who are either current or former employees.

Consider the following SQL statement:SELECT employee_id FROM employeesUNIONSELECT employee_id FROM former_employees;What does this statement do?

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Consider the following SQL statement:

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