1. Har bir talaba o’ziga berilgan predmet soha mavzusi bo’yicha and, or

4. Har bir talaba o’ziga berilgan predmet soha mavzusi bo’yicha HAVING
operatoridan foydalanib so’rovlar yaratishi va natijasi bilan ko’rsatib 
o’tishi kerak. 
mysql> SELECT COUNT(xodim_id), familiya FROM xodimlar GROUP BY maosh HAVING COUNT(xodim_id)
> 1;
+-----------------+--------------+
| COUNT(xodim_id) | familiya |
+-----------------+--------------+
| 2 | Tursunov |
| 2 | Keldiyev |
| 2 | Abdulhamidov |
+-----------------+--------------+
3 rows in set (0.00 sec)
5. Har bir talaba o’ziga berilgan predmet soha mavzusi bo’yicha UNION, 
INTERSECT, MINUS operatorlaridan foydalanib so’rovlar yaratishi va 
natijasi bilan ko’rsatib o’tishi kerak. 
mysql> SELECT familiya FROM xodimlar UNION SELECT nazoratchi_xodim FROM qismlar ORDER BY 
familiya;
+-------------------+
| familiya |
+-------------------+
| Abdulhamidov |
| Abdulla Komilov |
| Behzod Keldiyev |
| Ismoilov |
| Keldiyev |
| Komilov |
| Mahamadjonov |
| Nosiraliyev |
| Rayimjonov |
| Tursunov |
+-------------------+
10 rows in set (0.02 sec)
mysql> SELECT javobgar_xodim FROM mashinalar INTERSECT SELECT nazoratchi_xodim FROM xomashyo;
+-----------------+

---

| javobgar_xodim |
+-----------------+
| Behzod Keldiyev |
+-----------------+
1 row in set (0.00 sec)
(MINUS opertori MySql 8.0 da deprecate ga uchragan uning o`rniga shu vazifani bajaruvchi EXCEPT operatori 
mavjud)
mysql> SELECT javobgar_xodim FROM mashinalar EXCEPT SELECT nazoratchi_xodim FROM xomashyo;
+-------------------+
| javobgar_xodim |
+-------------------+
| Abdulla Komilov |
+-------------------+
1 row in set (0.00 sec)
mysql>