sql seuence and queries

1. SQL> create sequence pooja;
Sequence created.
SQL> minvalue with1
SP2-0734: unknowncommandbeginning"minvaluew..." - restof line ignored.
SQL> minvalue 1
SP2-0042: unknowncommand"minvalue1" - restof line ignored.
SQL> create sequence sqnamestartwith1
2 incrementby1;
Sequence created.
SQL> create table stud(s_idnumber(2),s_name varchar2(21));
create table stud(s_idnumber(2),s_name varchar2(21))
*
ERROR at line 1:
ORA-00955: name is alreadyusedbyan existingobject
SQL> create table stud1(s_idnumber(2),s_name varchar2(21));
Table created.
SQL> insertintostud1("1","pooja");
insertintostud1("1","pooja")
*

2. ERROR at line 1:
ORA-00926: missingVALUESkeyword
SQL> insertintostud1 values("1","pooja");
insertintostud1values("1","pooja")
*
ERROR at line 1:
ORA-00984: columnnot allowedhere
SQL> insertintostud1 values('1'.'pooja');
insertintostud1values('1'.'pooja')
*
ERROR at line 1:
ORA-00917: missingcomma
SQL> insertintostud1 values('1','pooja');
1 rowcreated.
SQL> insertintostud1 values('2','riya');
1 rowcreated.
SQL> insertintostud1 values('2','riya');
1 rowcreated.

3. SQL> insertintostud1 values(sqname.nextval,'rekha');
1 rowcreated.
SQL> selectc*formstud1;
SP2-0734: unknowncommandbeginning"selectc*f..." - restof line ignored.
SQL> select*formstud1;
select*formstud1
*
ERROR at line 1:
ORA-00923: FROM keywordnotfoundwhere expected
SQL> select*fromstud1;
S_ID S_NAME
---------- ---------------------
1 pooja
2 riya
2 riya
1 rekha
SQL> insertintostud1 values(sqname.nextval,'radhika');
1 rowcreated.
SQL> select*fromstud1;

4. S_ID S_NAME
---------- ---------------------
1 pooja
2 riya
2 riya
1 rekha
2 radhika
SQL> create table student1(s_idnumber(4),s_name varchar2(21),addressvarchar2(
21),s_contactN number(7));
create table student1(s_idnumber(4),s_name varchar2(21),addressvarchar2(21),s
_contactN number(7))
*
ERROR at line 1:
ORA-00955: name is alreadyusedbyan existingobject
SQL> create table studentmca(s_idnumber(4),s_name varchar2(21),addressvarchar
2(21),s_contactN number(7));
Table created.
SQL> desc studentmca;
Name Null? Type
----------------------------------------- -------- ----------------------------
S_ID NUMBER(4)
S_NAME VARCHAR2(21)
ADDRESS VARCHAR2(21)

5. S_CONTACTN NUMBER(7)
SQL> create table studentmca(s_idnumber(4),p1number(4),p2number(4),p3number
(4));
create table studentmca(s_idnumber(4),p1number(4),p2number(4),p3number(4))
*
ERROR at line 1:
ORA-00955: name is alreadyusedbyan existingobject
SQL> create table resultmca(s_idnumber(4),p1number(4),p2number(4),p3number(
4));
Table created.
SQL> desc resultmca;
Name Null? Type
----------------------------------------- -------- ----------------------------
S_ID NUMBER(4)
P1 NUMBER(4)
P2 NUMBER(4)
P3 NUMBER(4)
SQL> desc studentmca;
Name Null? Type
----------------------------------------- -------- ----------------------------
S_ID NUMBER(4)

6. S_NAME VARCHAR2(21)
ADDRESS VARCHAR2(21)
S_CONTACTN NUMBER(7)
SQL> inserttable studentmcavalues('1','pooja','kurji','7654303');
inserttable studentmcavalues('1','pooja','kurji','7654303')
*
ERROR at line 1:
ORA-00925: missingINTOkeyword
SQL> insertintostudentmcavalues('1','pooja','kurji','7654303');
1 rowcreated.
SQL> insertintostudentmcavalues('2','pushpaq','patna','7624303');
1 rowcreated.
SQL> insertintostudentmcavalues('3','ravi','patna','6624303');
1 rowcreated.
SQL> insertintostudentmcavalues('4','raja','patna','6634303');
1 rowcreated.
SQL> insertintostudentmcavalues('5','raj','delhi','6637303');

7. 1 rowcreated.
SQL> desc resultmca;
Name Null? Type
----------------------------------------- -------- ----------------------------
S_ID NUMBER(4)
P1 NUMBER(4)
P2 NUMBER(4)
P3 NUMBER(4)
SQL> insertintoresultmcavalues('1','45','65','76');
1 rowcreated.
SQL> insertintoresultmcavalues('2','47','64','76');
1 rowcreated.
SQL> insertintoresultmcavalues('3','47','65','78');
1 rowcreated.
SQL> insertintoresultmcavalues('4','46','68','78');
1 rowcreated.
SQL> insertintoresultmcavalues('5','46','69','78');

8. 1 rowcreated.
SQL> select*from resultmca;
S_ID P1 P2 P3
---------- -------------------- ----------
1 45 65 76
2 47 64 76
3 47 65 78
4 46 68 78
5 46 69 78
SQL> select* from'p1' where s_idinwhere p1>60;
select* from'p1' where s_idinwhere p1>60
*
ERROR at line 1:
ORA-00903: invalidtable name
SQL> select* from studentmcawhere s_idin(selectidfromresultmcawhere p1>=6
0);
select* fromstudentmcawhere s_idin(selectidfromresultmcawhere p1>=60)
*
ERROR at line 1:
ORA-00904: "ID": invalididentifier
SQL> select* from studentmcawhere s_idin(selects_idfromresultmcawhere p1>
=60);

9. no rowsselected
SQL> select* from studentmcawhere s_idin(selects_idfromresultmcawhere p3>
=60);
S_ID S_NAME ADDRESS S_CONTACTN
---------- --------------------- --------------------- ----------
1 pooja kurji 7654303
2 pushpaq patna 7624303
3 ravi patna 6624303
4 raja patna 6634303
5 raj delhi 6637303
SQL>