Задание 1:
Есть 2 таблицы А и Б, нужно сказать сколько строк выведется при соединении.
TableA
id1
1
1

TableB
id2
1
1
1
1
NULL


Please provide the count of rows for each join for Table A and Table B:
Left  join:
Right join:
inner join:
full join:


Задание 2:
Department table (id, name)
D1 Finance Dept
D2 HR Dept
D3 AR Dept
F1 AP Dept

Employee table (id, name, deptNo, sex, hireDate, Salary,effectiveDate)
E1, sample1, D1,M,01/01/2000, 5000, 01/01/2000
E1, sample1, D1,M,01/01/2000, 6000, 01/01/2001
E1, sample1, D2,M,01/01/2000, 6000, 01/02/2001
E2, sample1, D2,M,01/01/2000, 6000, 01/02/2001
E3, sample1, D1,M,01/01/2000, 5000, 01/01/2000
E3, sample1, D1,M,01/01/2000, 6000, 01/01/2001
E4, sample1, F1,M,01/01/2000, 5000, 01/01/2000
E4, sample1, D1,M,01/01/2000, 6000, 01/01/2001
E4, sample1, D3,M,01/01/2000, 8000, 01/02/2001
E5, sample1, D3,F,01/01/2001, 8000, 01/02/2001
E6, sample1, D3,F,01/01/2001, 9000, 01/02/2001

1.Write a query to display latest salary of each employee

2. Write a query to display department name where employees count in the department is
more than 2

Задание 3 (code):
 Given two strings, output the words that are unique to each string.
 Example:
   String 1: The quick brown fox jumped over the lazy fox
   String 2: The slow blue whale swam over the quick shark

 Output: slow, brown, blue, fox, whale, jumped, swam, lazy, shark


Задание 4 (моделирование):
Employee Seat Assignment
Daily some employees in the organization transfer from one manager to another manager.
This transfer leads to new seat assignment at his new work location.

Can you do a data model to maintain the history of work location changes? (нужно прикинуть какой подход для моделирования использовать, какие колонки будут в таблице, как отображать историю)