Most Common Sql Interview Questions 1 | SQL Advanced Questions | Ashutosh Kumar 

Sql one of the most important language asked in most of the analytics interviews, in this i will be solving sql questions which was asked to me in one of the company.
drop table if employees;
create table employees(
employee_name varchar(133),
salary integer);
insert into employees (employee_name,salary)
values ('A' ,'24000'),
('C',' 34000'),
('D',' 55000'),
('E',' 75000'),
('F',' 21000'),
('G',' 40000'),
('H','50000');
drop table if exists tble;
create table tble(
id varchar(133),
name varchar(133),
age integer);
insert into tble (id,name,age)
values ('1','a','21'),
('2','b','23'),
('2','b','23'),
('4','d','22'),
('5','e','25'),
('6','g','26'),
('5','e','25');
drop table if exists tble1;
create table tble1(
name varchar(133),
email varchar(133));
insert into tble1 (name,email) values
('A','FEEDCSEAWN@EMAIL.COM'),
('B','IYYRWIRYF@EMAIL.COM'),
('C','QZANB@EMAIL.COM'),
('D','POIJN@EMAIL.COM'),
('E','UTYVDHS09@EMAIL.COM'),
('F','VNJV6235263@EMAIL.COM'),
('G','039FNJHC65@EMAIL.COM'),
('H','2738BHSBX5GCS@EMAIL.COM');
drop table if exists tble2;
create table tble2(
ID INTEGER,
name varchar(133),
SALARY INTEGER,
MANAGERID INTEGER);
INSERT INTO TBLE2 (ID,NAME,SALARY,MANAGERID)
VALUES
('1','JOE','70000','3'),
('2','HENRY','80000','4'),
('3','SAM','60000',NULL),
('4','MAX','90000',NULL)
;
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