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roll uq
name not null
branch cse or it
cllgid>0 nn
after 2012
>60
college
cllgid cllgname branch loc strnth
unq unq cse or it nn nn
5studnts
1 for each branch of each collg 1 duplicate
2cllg
bpti mait
create table stdnt2(
rno number(11) primary key,
name varchar(10) NOT NULL,
branch varchar(3) NOT NULL,
collgid number(6) NOT NULL check(collgid > 0) ,
yoad number(4)check(yoad >2014),
qlf number(4)check (qlf >60),
foreign key(collgid,branch) references cllg2(collgid,branch)
);
desc cllg2
desc stdnt2
select * from cllg2
create table cllg2 (collgid number(5) , cllgname varchar(10) NOT NULL, branch varchar(3) NOT NULL ,loc varchar(10) NOT NULL, strength number(3), check(branch in ('cse','it')),primary key(collgid,branch));
insert into cllg2 values(1011,'bpit','cse','rohini',300)
insert into cllg2 values(1011,'bpit','it','rohini',150)
insert into cllg2 values(1012,'mait','cse','rohini',400)
insert into cllg2 values(1012,'mait','it','rohini',250)
insert into stdnt2 values (12,'jugnu','cse',1011,2013,75)
,(13,'mannu','it',1011,2013,78),(14,'babbu','cse',1012,2013,80),(15,'kaka','it',1012,2013,90),(15,'golu','cse',1011,2013,75));
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