select * from student --display all data
select id,name,contactnumber from student --display selected column
select * from student where batchcode='1208c1' -- where clause with one column
select * from student where name='emad' and batchcode='1708c1' and id=1003 --where clause with and operator
select * from student where batchcode='1708c1' or batchcode='120c1'
select * from student order by name desc
select * from student order by name asc
select * from student order by id desc
select * from student where batchcode!='1707b1' and batchcode!='1610c1'
select * from student where batchcode!='1707b1' or batchcode!='1610c1'
select * from student where batchcode not in ('1707b1','1610c1','1502c1')
select * from student where id not in (1002,1003,1004,2,4)
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