From 47641075771ed4aa9825d1ca79d645a585635de8 Mon Sep 17 00:00:00 2001 From: Aadit Agrawal Date: Fri, 24 Jan 2025 10:03:20 +0530 Subject: [PATCH] Delete OS/bash/Week4/SQLPlus.md --- OS/bash/Week4/SQLPlus.md | 476 --------------------------------------- 1 file changed, 476 deletions(-) delete mode 100644 OS/bash/Week4/SQLPlus.md diff --git a/OS/bash/Week4/SQLPlus.md b/OS/bash/Week4/SQLPlus.md deleted file mode 100644 index fd1e73c..0000000 --- a/OS/bash/Week4/SQLPlus.md +++ /dev/null @@ -1,476 +0,0 @@ -Credentials - -- `CCE230953344@ictorcl` -- `student` - -## SQL Logs -```sql -SQL> create table PERSON(driver_id# varchar(30) primary key,name varchar(50),address varchar(100)); - -Table created. - -SQL> desc person - Name Null? Type - ----------------------------------------- -------- ---------------------------- - DRIVER_ID# NOT NULL VARCHAR2(30) - NAME VARCHAR2(50) - ADDRESS VARCHAR2(100) - -SQL> create table CAR(regno varchar(20) primary key,model varchar(30),year int); - -Table created. - -SQL> create table ACCIDENT(report_number int, accd_date date, location varchar(50)); - -Table created. - -SQL> desc accident - Name Null? Type - ----------------------------------------- -------- ---------------------------- - REPORT_NUMBER NUMBER(38) - ACCD_DATE DATE - LOCATION VARCHAR2(50) - -SQL> alter table accident add constraint pkey primary key(report_number); - -Table altered. - -SQL> desc ACCIDENT; - Name Null? Type - ----------------------------------------- -------- ---------------------------- - REPORT_NUMBER NOT NULL NUMBER(38) - ACCD_DATE DATE - LOCATION - -SQL> create table OWNS (driver_id# varchar(30),regno varchar(20),primary key(driver_id#,regno),constraint fkey1 foreign key(driver_id#)references PERSON (driver_id#),constraint fkey2 foreign key(regno)references CAR); - -Table created. - -SQL> desc OWNS - Name Null? Type - ----------------------------------------- -------- ---------------------------- - DRIVER_ID# NOT NULL VARCHAR2(30) - REGNO NOT NULL VARCHAR2(20) - -SQL> select table_name from user_tables; - -TABLE_NAME --------------------------------------------------------------------------------- -ACCIDENT -CAR -OWNS -PERSON - -SQL> create table PARTICIPATED (driver_id# varchar(30), regno varchar(20), report_number int, damage_amount int, primary key(driver_id#,regno,report_number),constraint fkey1participated foreign key(driver_id#) references Person(driver_id#),constraint fkey2participated foreign key(regno) references car(regno),constraint fkey3paricipated foreign key(report_number) references accident); - -Table created. - -SQL> desc PARTICIPATED - Name Null? Type - ----------------------------------------- -------- ---------------------------- - DRIVER_ID# NOT NULL VARCHAR2(30) - REGNO NOT NULL VARCHAR2(20) - REPORT_NUMBER NOT NULL NUMBER(38) - DAMAGE_AMOUNT NUMBER(38) -``` - -Now, we enter values. -```sql -SQL> insert into person values(1234,'Rohan','Delhi India'); - -1 row created. - -SQL> select * from person; - -DRIVER_ID# NAME ----------- -------------------------------------------------- -ADDRESS --------------------------------------------------------------------------------- -1234 Rohan -Delhi India - - -SQL> alter table person modify driver_id# varchar (30); - -Table altered. - -SQL> insert into person values(1235,'Rohit','Banglalore India'); - -1 row created. - -SQL> insert into person values(1236,'Ramesh','Baharashtra India'); - -1 row created. - -SQL> insert into person values(1237,'Saarthak','Manipal India'); - -1 row created. - -SQL> desc person; - Name Null? Type - ----------------------------------------- -------- ---------------------------- - DRIVER_ID# NOT NULL VARCHAR2(30) - NAME VARCHAR2(50) - ADDRESS VARCHAR2(100) - -SQL> select * from person; - -DRIVER_ID# ------------------------------- -NAME --------------------------------------------------- -ADDRESS --------------------------------------------------------------------------------- -1234 -Rohan -Delhi India - -1235 -Rohit -Banglalore India - -DRIVER_ID# ------------------------------- -NAME --------------------------------------------------- -ADDRESS --------------------------------------------------------------------------------- - -1236 -Ramesh -Baharashtra India - -1237 -Saarthak - -DRIVER_ID# ------------------------------- -NAME --------------------------------------------------- -ADDRESS --------------------------------------------------------------------------------- -Manipal India -``` - -Now, we modify the varchar sizes so that we can fix the display formatting. - -```sql -SQL> alter table person modify address varchar (30); - -Table altered. - -SQL> select * from person; - -DRIVER_ID# NAME ------------------------------- ---------------------------------------- -ADDRESS ------------------------------- -1234 Rohan -Delhi India - -1235 Rohit -Banglalore India - -1236 Ramesh -Baharashtra India - - -DRIVER_ID# NAME ------------------------------- ---------------------------------------- -ADDRESS ------------------------------- -1237 Saarthak -Manipal India - -SQL> alter table person modify driver_id# varchar (4); - -Table altered. - -SQL> alter table person modify name varchar (10); - -Table altered. - -SQL> select * from person; - -DRIV NAME ADDRESS ----- ---------- ------------------------------ -1234 Rohan Delhi India -1235 Rohit Banglalore India -1236 Ramesh Baharashtra India -1237 Saarthak Manipal India - -``` - -Data updation. -```sql -SQL> update person set address='Maharashtra India' WHERE driver_id# = 1236; - -1 row updated. - -SQL> select * from person; - -DRIV NAME ADDRESS ----- ---------- ------------------------------ -1234 Rohan Delhi India -1235 Rohit Banglalore India -1236 Ramesh Maharashtra India -1237 Saarthak Manipal India - -SQL> insert into person values(1238, 'Amogh', 'Muzaffarnagar'); - -1 row created. -``` -### Listing Tables -```sql -SQL> select table_name from user_tables; - -TABLE_NAME --------------------------------------------------------------------------------- -ACCIDENT -CAR -OWNS -PARTICIPATED -PERSON -``` -More Data Entry. -```sql -SQL> insert into car values('ABCD0001','Celtos',3); - -1 row created. - -SQL> insert into car values('EFGH2001','Ferrari',32); - -1 row created. - -SQL> insert into car values('DSDS0001','Urus',5); - -1 row created. - -SQL> insert into car values('ABCD4001','Honda City',1); - -1 row created. - -SQL> insert into car values('HFSP5601','mini cooper',7); - -1 row created. - -SQL> select * from car; - -REGNO MODEL YEAR --------------------- ------------------------------ ---------- -ABCD0001 Celtos 3 -EFGH2001 Ferrari 32 -DSDS0001 Urus 5 -ABCD4001 Honda City 1 -HFSP5601 mini cooper 7 - -SQL> insert into accident values(0001,'01-Jan-2024','Delhi India'); - -1 row created. - -SQL> select * from accident; - -REPORT_NUMBER ACCD_DATE LOCATION -------------- --------- -------------------------------------------------- - 1 01-JAN-24 Delhi India - -SQL> insert into accident values(0003,'29-feb-2024',' India'); - -1 row created. - -SQL> insert into accident values(0004,'11-Oct-1993',' Daman and Diu India'); - -1 row created. - -SQL> insert into accident values(0005,'31-march-2200',' Gujrat India'); - -1 row created. - -SQL> insert into accident values(12,'17-july-2900',' karnataka India'); - -1 row created. - -SQL> select * from accident; - -REPORT_NUMBER ACCD_DATE LOCATION -------------- --------- -------------------------------------------------- - 1 01-JAN-24 Delhi India - 3 29-FEB-24 India - 4 11-OCT-93 Daman and Diu India - 5 31-MAR-00 Gujrat India - 12 17-JUL-00 karnataka India - -SQL> insert into owns values(1234,'ABCD0001'); - -1 row created. - -SQL> insert into owns values(1235,'EFGH2001'); - -1 row created. - -SQL> insert into owns values(1236,'DSDS0001'); - -1 row created. - -SQL> insert into owns values(1237,'ABCD4001'); - -1 row created. - -SQL> insert into owns values(1238,'HFSP5601'); - -1 row created. - -SQL> select * from owns; - -DRIVER_ID# REGNO ------------------------------- -------------------- -1234 ABCD0001 -1235 EFGH2001 -1236 DSDS0001 -1237 ABCD4001 -1238 HFSP5601 -``` -Note: -```sql -SQL> @/filename.sql -``` -will import the commands from a doc and run them. - -Saved commands into `participated.sql`. - -```sql -SQL> @C:\Users\student\Downloads\participated.sql - -1 row created. - - -1 row created. - - -1 row created. - - -1 row created. - - -1 row created. - - -SQL> select * from participated; - -DRIVER_ID# REGNO REPORT_NUMBER DAMAGE_AMOUNT ------------------------------- -------------------- ------------- ------------- -1234 ABCD0001 1 10000 -1236 DSDS0001 3 150 -1237 ABCD4001 4 799 -1238 HFSP5601 5 1500 -1238 HFSP5601 12 95500 -``` -## Q3 -Updating data entries: -```sql -SQL> update participated set damage_amount=25000 where regno='HFSP5601' and report_number=12; - -1 row updated. - -SQL> update participated set damage_amount=25000 where regno='ABCD0001' and report_number=12; - -0 rows updated. - -SQL> select * from participated; - -DRIVER_ID# REGNO REPORT_NUMBER DAMAGE_AMOUNT ------------------------------- -------------------- ------------- ------------- -1234 ABCD0001 1 10000 -1236 DSDS0001 3 150 -1237 ABCD4001 4 799 -1238 HFSP5601 5 1500 -1238 HFSP5601 12 25000 -``` - -## Q4 -### Dropping an attribute -```sql -SQL> alter table Participated - - 2 drop constraint fkey3paricipated; - -Table altered. - -SQL> select * from participated; - -DRIVER_ID# REGNO REPORT_NUMBER DAMAGE_AMOUNT ------------------------------- -------------------- ------------- ------------- -1234 ABCD0001 1 10000 -1236 DSDS0001 3 150 -1237 ABCD4001 4 799 -1238 HFSP5601 5 1500 -1238 HFSP5601 12 25000 -``` - -Adding back the attribute. - -```sql -SQL> alter table Participated - 2 add constraint fkey3participated foreign key(report_number) references accident(report_number) - 3 on delete cascade; - -Table altered. -``` - -### Conditional Deletion -```sql -SQL> select * from accident; - -REPORT_NUMBER ACCD_DATE LOCATION -------------- --------- -------------------------------------------------- - 1 01-JAN-24 Delhi India - 3 29-FEB-24 India - 4 11-OCT-93 Daman and Diu India - 5 31-MAR-00 Gujrat India - 12 17-JUL-00 karnataka India - -SQL > delete from accident where extract(year from accd_date)=1993; - -1 row deleted. - -SQL> select * from accident; - -REPORT_NUMBER ACCD_DATE LOCATION -------------- --------- -------------------------------------------------- - 1 01-JAN-24 Delhi India - 3 29-FEB-24 India - 5 31-MAR-00 Gujrat India - 12 17-JUL-00 karnataka India -``` - -## Q5 - -```sql -SQL> alter table Participated drop constraint fkey3participated; - -Table altered. - -SQL> alter table Participated add constraint fkey3participated foreign key(report_number) references accident(report_number) on delete cascade; - - -Table altered. -``` - -## Q6 - -```sql -SQL> alter table participated add constraint checkparticipated check(Damage_amount>=0); - -Table altered. - -SQL> select * from participated; - -DRIVER_ID# REGNO REPORT_NUMBER DAMAGE_AMOUNT ------------------------------- -------------------- ------------- ------------- -1234 ABCD0001 1 10000 -1236 DSDS0001 3 150 -1238 HFSP5601 5 1500 -1238 HFSP5601 12 25000 - -``` \ No newline at end of file