Sample is Null, Not, Between, and, in keywords
//alter table employee add (sal numeric(8,2))
alter table employee drop column sal
//rename emp1 to emp
//desc employee
insert into employee values('Mohan','Dhrbhanga','919874653231','55423','','40')
select * from employee where empname=''
select * from employee where empname is Null
select * from employee where empname is not Null
select * from employee where deptname=''
select empname,address,phno,salary,deptname,deptid from employee where not deptid=10
select empname,address,phno,salary,deptname,deptid from employee where not(deptid=10 or deptid=20)
select * from employee where not(deptid=10 or deptid=20)
select * from employee where deptid between 10 and 20
select * from employee where empid between 1 and 11
select * from employee where deptid >=10 and deptid <=20
select * from employee where deptid not between 10 and 20
select * from employee where empname like '_a%' or empname like '_r%'
select * from employee where empname like 'pr_%'
select * from employee where empname in ('pradeep','Ritesh','Amod','Panlkaj Chejara')
select * from employee where empname not in ('pradeep','Ritesh','Amod','Panlkaj Chejara')
https://www.youtube.com/channel/UCKLRUr6U5OFeu7FLOpQ-FSw/videos
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