The document contains SQL commands that create tables, insert data, and perform queries on the tables. The tables created are studies, software, and programmer. Data is inserted and various queries are run to retrieve, aggregate, and analyze the data. Key information summarized includes: - Tables were created to store student studies data, software project data, and programmer details. - Data was inserted into the tables and various queries were run to retrieve, calculate statistics on, and analyze the data across the tables. - Queries included finding averages, minimums, maximums, counts, sums, and using functions like trunc, round, and to_char to manipulate dates and strings.

1. SCHEMAS:
SQL> create table studies (pname varchar(30),splace varchar(20), course varchar(20), ccost number);
Table created.
SQL> create table software(pname varchar(20),title varchar(20),devin varchar(40),scost number,dcost
number,sold number);
Table created.
SQL> create table programmer(pname varchar(20),dob date,doj date,sex char(7),prof1 varchar(30),prof2
varchar(20),sal number);
Table created.
SQL> insert into studies values('neha','pentafour','DCA',3000);
1 row created.
SQL> insert into studies values('mick','perryridge','PGDCA',10000);
1 row created.
SQL> insert into studies values('john','downtown','DCA',4000);
1 row created.
SQL> select * from studies;
PNAME SPLACE COURSE
------------------------------ -------------------- --------------------
CCOST
----------
neha pentafour DCA
3000
mick perryridge PGDCA
10000
john downtown DCA
4000
SQL> insert into studies values('sam','pragathi','PGDCA',15000);
1 row created.
SQL> select * from studies;
PNAME SPLACE COURSE

2. ------------------------------ -------------------- --------------------
CCOST
----------
neha pentafour DCA
3000
mick perryridge PGDCA
10000
john downtown DCA
4000
PNAME SPLACE COURSE
------------------------------ -------------------- --------------------
CCOST
----------
sam pragathi PGDCA
15000
SQL> insert all into software values('raj','Gtalk','oracle',7000,5000,150) into software
values('kumar','chrome','vb',6000,4000,120) select * from dual;
2 rows created.
SQL> insert all into software values('mani','db2','oracle',7000,5000,150) into software
values('rakesh','inventory','vb',10000,9000,200) select * from dual;
2 rows created.
SQL> select * from software;
PNAME TITLE
-------------------- --------------------
DEVIN SCOST DCOST SOLD
---------------------------------------- ---------- ---------- ----------
raj Gtalk
oracle 7000 5000 150
kumar chrome
vb 6000 4000 120
mani db2
oracle 7000 5000 150
PNAME TITLE

3. -------------------- --------------------
DEVIN SCOST DCOST SOLD
---------------------------------------- ---------- ---------- ----------
rakesh inventory
vb 10000 9000 200
SQL> insert all into programmer values('sri',to_date('8-apr-1981','dd-mon-yyyy'),to_date('13-feb-
1998','dd-mon-yyyy'),'male','c','c++',25000) into programmer values('ferdy',to_date('11-mar-1979','dd-
mon-yyyy'),to_date('4-jun-1990'),'male','c++','pascal',45000) select * from dual;
2 rows created.
SQL> insert all into programmer values('shalini',to_date('30-apr-1981','dd-mon-yyyy'),to_date('28-aug-
1998','dd-mon-yyyy'),'female','c','c++',30000) into programmer values('harini',to_date('11-may-1982','dd-
mon-yyyy'),to_date('19-sep-1999'),'female','java','java',40000) select * from dual;
2 rows created.
SQL> select * from programmer;
PNAME DOB DOJ SEX PROF1
-------------------- --------- --------- ------- ------------------------------
PROF2 SAL
-------------------- ----------
sri 08-APR-81 13-FEB-98 male c
c++ 25000
ferdy 11-MAR-79 04-JUN-90 male c++
pascal 45000
shalini 30-APR-81 28-AUG-98 female c
c++ 30000
PNAME DOB DOJ SEX PROF1
-------------------- --------- --------- ------- ------------------------------
PROF2 SAL
-------------------- ----------
harini 11-MAY-82 19-SEP-99 female java
java 40000

4. QUERIES:
1.SQL> select avg(scost)from software where devin='oracle';
AVG(SCOST)
----------
7000
2.SQL> select
pname,trunc(months_between(sysdate,dob)/12)"age",trunc(months_between(sysdate,doj)/12)"experience
"from programmer;
PNAME age experience
-------------------- ---------- ----------
sri 31 15
ferdy 34 22
shalini 31 14
harini 30 13
3.SQL> select pname from studies where course='PGDCA';
PNAME
------------------------------
mick
sam
4.SQL> select max(sold) from software;
MAX(SOLD)
----------
200
5.SQL> select pname,dob from programmer where to_char(dob,’mon’)=’apr’;
PNAME
----------------
Sri
shalini
6.SQL> select min(ccost) from studies;
MIN(CCOST)
----------
3000

5. 7.SQL> select count(*) from studies where course='DCA';
COUNT(*)
----------
2
8.SQL> select sum(scost*sold-dcost) from software where devin='vb';
SUM(SCOST*SOLD-DCOST)
---------------------
2707000
9.SQL> select * from software where pname='rakesh';
PNAME TITLE
-------------------- --------------------
DEVIN SCOST DCOST SOLD
---------------------------------------- ---------- ---------- ----------
rakesh inventory
vb 10000 9000 200
10.SQL> select count(*) from studies where splace='pentafour';
COUNT(*)
----------
1
11.SQL> select * from software where scost*sold-dcost>5000;
PNAME TITLE
-------------------- --------------------
DEVIN SCOST DCOST SOLD
---------------------------------------- ---------- ---------- ----------
raj Gtalk
oracle 7000 5000 150
kumar chrome
vb 6000 4000 120
mani db2
oracle 7000 5000 150
PNAME TITLE
-------------------- --------------------

6. DEVIN SCOST DCOST SOLD
---------------------------------------- ---------- ---------- ----------
rakesh inventory
vb 10000 9000 200
12.SQL> select ceil(dcost/scost) from software;
CEIL(DCOST/SCOST)
-----------------
1
1
1
1
13.SQL> select *from software where scost*sold>=dcost;
PNAME TITLE
-------------------- --------------------
DEVIN SCOST DCOST SOLD
---------------------------------------- ---------- ---------- ----------
raj Gtalk
oracle 7000 5000 150
kumar chrome
vb 6000 4000 120
mani db2
oracle 7000 5000 150
PNAME TITLE
-------------------- --------------------
DEVIN SCOST DCOST SOLD
---------------------------------------- ---------- ---------- ----------
rakesh inventory
vb 10000 9000 200
14.SQL> select max(scost) from software where devin='vb';
MAX(SCOST)
----------
10000

7. 15.SQL> select avg(scost) from software where devin='oracle';
AVG(SCOST)
----------
7000
16.SQL> select count(*) from studies where splace='pragathi';
COUNT(*)
----------
1
17.SQL> select count(*) from studies where ccost between 9000 and 16000;
COUNT(*)
----------
2
18.SQL> select avg(ccost) from studies;
AVG(CCOST)
----------
8000
19.SQL> select pname from programmer where prof1='c'or prof2='c';
PNAME
--------------------
sri
shalini
20.SQL> select count(pname) from programmer where prof1 in('c','pascal')or prof2 in('c','pascal');
COUNT(PNAME)
------------
3
21.SQL> select count(pname) from programmer where prof1 not in('c','c++')or prof2 not in('c','c++');
COUNT(PNAME)
------------
2

8. 22.SQL> select round(max(months_between(sysdate,dob)/12)) from programmer where sex='male';
ROUND(MAX(MONTHS_BETWEEN(SYSDATE,DOB)/12))
------------------------------------------
34
23.SQL> select round(avg(months_between(sysdate,dob)/12)) from programmer where sex='female';
ROUND(AVG(MONTHS_BETWEEN(SYSDATE,DOB)/12))
------------------------------------------
31
24.SQL> select pname,trunc(months_between(sysdate,doj)/12) from programmer order by pname desc;
PNAME TRUNC(MONTHS_BETWEEN(SYSDATE,DOJ)/12)
-------------------- -------------------------------------
sri 15
shalini 14
harini 13
ferdy 22
25.SQL> select pname from programmer where to_char(dob,'mon')=to_char(sysdate,'mon');
PNAME
--------------------
ferdy
26.SQL> select count(*) from programmer where sex='female';
COUNT(*)
----------
2
27.SQL> select distinct(prof1) from programmer where sex='male';
PROF1
------------------------------
c
c++

9. 28.SQL> select avg(sal) from programmer;
AVG(SAL)
----------
35000
29.SQL> select count(*) from programmer where sal between 20000 and 40000;
COUNT(*)
----------
3
30.SQL> select * from programmer where prof1 not in('c','c++','pascal') and prof2 not in('c','c++','pascal');
PNAME DOB DOJ SEX PROF1
-------------------- --------- --------- ------- ------------------------------
PROF2 SAL
-------------------- ----------
harini 11-MAY-82 19-SEP-99 female java
java 40000
31.SQL> select pname,title,scost from software where scost in(select max(scost) from software);
PNAME TITLE SCOST
-------------------- -------------------- ----------
rakesh inventory 10000
32.SQL> select 'Mr.'|| pname||'-has' || trunc(months_between(sysdate,doj)/12) || 'yeares of
experience'"programmer" from programmer where sex='male';
programmer
--------------------------------------------------------------------------------
Mr.sri-has15yeares of experience
Mr.ferdy-has22yeares of experience
SQL> spool off