Oracle SQL command line (III. addition, deletion, modification and query)

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SQL> select * from stu;

SON      SNAME                      SAGE
-------- -------------------- ----------
1001      Zhang San                          18
1003      Li Si                          22
1002      Wang Wu                          19
2222      ha-ha                          22

SQL> insert into stu
  2  values('1234',' Lennon ',19);

 Created  1  That's ok .

SQL> update stu
  2  set sage=49
  3  where sname=' Lennon ';

 Updated  1  That's ok .

SQL> delete
  2  from stu
  3  where son=2222;

 deleted  1  That's ok .

SQL> select * from stu;

SON      SNAME                      SAGE
-------- -------------------- ----------
1001      Zhang San                          18
1003      Li Si                          22
1002      Wang Wu                          19
1234      Lennon                          49

      

       
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