Unnamed PL/SQL code block: Use of Control structure and Exception handling is mandatory. Write a PL/SQL block of code for the following requirements

Jan 21, 20210 likes4,601 views

The document outlines a problem statement for creating a PL/SQL code block focusing on managing library fines for book borrowers based on the number of days a book is overdue. It describes the schema for borrower and fine tables, the fine calculation logic based on overdue days, and updates borrower status when a book is returned. Additionally, it provides examples of procedures and SQL commands executed to demonstrate functionality.

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Practical No: 5
Problem Statement: Unnamed PL/SQL code block: Use of Control structure and
Exception handling is mandatory.
Write a PL/SQL block of code for the following requirements:-
Schema:
1. Borrower(Rollin, Name, DateofIssue, NameofBook, Status)
2. Fine(Roll_no,Date,Amt)
- Accept roll_no & name of book from user.
- Check the number of days (from date of issue), if days are between 15 to 30
then fine amount will be Rs 5per day.
- If no. of days>30, per day fine will be Rs 50 per day & for days less than
30, Rs. 5 per day.
- After submitting the book, status will change from I to R.
- If condition of fine is true, then details will be stored into fine table.
Frame the problem statement for writing PL/SQL block inline with above
statement.
Database changed
mysql> show tables;
+-----------------+
| Tables_in_prac5 |
+-----------------+
| Borrower |
| Fine |
+-----------------+
2 rows in set (0.00 sec)
mysql> desc Borrower;
+--------------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------------+-------------+------+-----+---------+-------+
| Rollin | int(12) | NO | PRI | NULL | |
| Name | varchar(25) | YES | | NULL | |
| DateOfIsssue | date | YES | | NULL | |
| Nameofbook | varchar(25) | YES | | NULL | |
| Status | varchar(3) | YES | | NULL | |
+--------------+-------------+------+-----+---------+-------+
5 rows in set (0.00 sec)
mysql> desc Fine;
+--------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------+---------+------+-----+---------+-------+
| Rollno | int(12) | NO | PRI | NULL | |
| Date | date | YES | | NULL | |
| Amt | int(12) | YES | | NULL | |
+--------+---------+------+-----+---------+-------+
3 rows in set (0.00 sec)
mysql> select * From Borrower;
+--------+--------+--------------+------------+--------+
| Rollin | Name | DateOfIsssue | Nameofbook | Status |
+--------+--------+--------------+------------+--------+
| 1 | Rahul | 2019-07-13 | dbms | I |
| 2 | Rakesh | 2019-07-28 | sql | I |
| 33 | Aadil | 2019-05-13 | toc | I |
| 85 | Akbar | 2019-06-20 | java | I |
+--------+--------+--------------+------------+--------+
4 rows in set (0.00 sec)
mysql> select * From Fine;
Empty set (0.00 sec)

dilimiter $
mysql> create procedure calfine(Rollno int(20),name varchar(50))
begin
declare ldate date;
declare fine int(20);
declare day int(20);
select DateOfIsssue into ldate from Borrower where Rollin=Rollno and
Nameofbook=name;
set day = DATEDIFF(CURDATE(),ldate);
IF(day>=15 and day<=30) then
set fine=day*5;
ELSEIF(day>30) then
set fine=day*50;
end IF;
update Borrower set Status='R' where Rollin=Rollno and Nameofbook=name;
IF(fine is not null) then
insert into Fine values(Rollno,CURDATE(),fine);
end IF;
end $
mysql> call calfine(33,'toc')$
Query OK, 1 row affected (0.03 sec)
mysql> select * from Fine$
+--------+------------+------+
| Rollno | Date | Amt |
+--------+------------+------+
| 33 | 2019-08-07 | 4300 |
+--------+------------+------+
1 row in set (0.00 sec)
mysql> call calfine(2,'sql')$
Query OK, 1 row affected (0.36 sec)
mysql> call calfine(1,'dbms')$
Query OK, 1 row affected (0.34 sec)
mysql> select * from Borrower$
+--------+--------+--------------+------------+--------+
| Rollin | Name | DateOfIsssue | Nameofbook | Status |
+--------+--------+--------------+------------+--------+
| 1 | Rahul | 2019-07-13 | dbms | R |
| 2 | Rakesh | 2019-07-28 | sql | R |
| 33 | Aadil | 2019-05-13 | toc | R |
| 85 | Akbar | 2019-06-20 | java | I |
+--------+--------+--------------+------------+--------+
4 rows in set (0.00 sec)
mysql> select * from Fine$
+--------+------------+------+
| Rollno | Date | Amt |
+--------+------------+------+
| 1 | 2019-08-07 | 125 |
| 33 | 2019-08-07 | 4300 |
+--------+------------+------+
2 rows in set (0.00 sec)

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Linear regression and logistic regression are two machine learning algorithms that can be implemented in Python. Linear regression is used for predictive analysis to find relationships between variables, while logistic regression is used for classification with binary dependent variables. Support vector machines (SVMs) are another algorithm that finds the optimal hyperplane to separate data points and maximize the margin between the classes. Key terms discussed include cost functions, gradient descent, confusion matrices, and ROC curves. Code examples are provided to demonstrate implementing linear regression, logistic regression, and SVM in Python using scikit-learn.

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Unnamed PL/SQL code block: Use of Control structure and Exception handling is mandatory. Write a PL/SQL block of code for the following requirements

1. Practical No: 5 Problem Statement: Unnamed PL/SQL code block: Use of Control structure and Exception handling is mandatory. Write a PL/SQL block of code for the following requirements:- Schema: 1. Borrower(Rollin, Name, DateofIssue, NameofBook, Status) 2. Fine(Roll_no,Date,Amt) - Accept roll_no & name of book from user. - Check the number of days (from date of issue), if days are between 15 to 30 then fine amount will be Rs 5per day. - If no. of days>30, per day fine will be Rs 50 per day & for days less than 30, Rs. 5 per day. - After submitting the book, status will change from I to R. - If condition of fine is true, then details will be stored into fine table. Frame the problem statement for writing PL/SQL block inline with above statement. Database changed mysql> show tables; +-----------------+ | Tables_in_prac5 | +-----------------+ | Borrower | | Fine | +-----------------+ 2 rows in set (0.00 sec) mysql> desc Borrower; +--------------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------------+-------------+------+-----+---------+-------+ | Rollin | int(12) | NO | PRI | NULL | | | Name | varchar(25) | YES | | NULL | | | DateOfIsssue | date | YES | | NULL | | | Nameofbook | varchar(25) | YES | | NULL | | | Status | varchar(3) | YES | | NULL | | +--------------+-------------+------+-----+---------+-------+ 5 rows in set (0.00 sec) mysql> desc Fine; +--------+---------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------+---------+------+-----+---------+-------+ | Rollno | int(12) | NO | PRI | NULL | | | Date | date | YES | | NULL | | | Amt | int(12) | YES | | NULL | | +--------+---------+------+-----+---------+-------+ 3 rows in set (0.00 sec) mysql> select * From Borrower; +--------+--------+--------------+------------+--------+ | Rollin | Name | DateOfIsssue | Nameofbook | Status | +--------+--------+--------------+------------+--------+ | 1 | Rahul | 2019-07-13 | dbms | I | | 2 | Rakesh | 2019-07-28 | sql | I | | 33 | Aadil | 2019-05-13 | toc | I | | 85 | Akbar | 2019-06-20 | java | I | +--------+--------+--------------+------------+--------+ 4 rows in set (0.00 sec) mysql> select * From Fine; Empty set (0.00 sec)

2. dilimiter $ mysql> create procedure calfine(Rollno int(20),name varchar(50)) begin declare ldate date; declare fine int(20); declare day int(20); select DateOfIsssue into ldate from Borrower where Rollin=Rollno and Nameofbook=name; set day = DATEDIFF(CURDATE(),ldate); IF(day>=15 and day<=30) then set fine=day*5; ELSEIF(day>30) then set fine=day*50; end IF; update Borrower set Status='R' where Rollin=Rollno and Nameofbook=name; IF(fine is not null) then insert into Fine values(Rollno,CURDATE(),fine); end IF; end $ mysql> call calfine(33,'toc')$ Query OK, 1 row affected (0.03 sec) mysql> select * from Fine$ +--------+------------+------+ | Rollno | Date | Amt | +--------+------------+------+ | 33 | 2019-08-07 | 4300 | +--------+------------+------+ 1 row in set (0.00 sec) mysql> call calfine(2,'sql')$ Query OK, 1 row affected (0.36 sec) mysql> call calfine(1,'dbms')$ Query OK, 1 row affected (0.34 sec) mysql> select * from Borrower$ +--------+--------+--------------+------------+--------+ | Rollin | Name | DateOfIsssue | Nameofbook | Status | +--------+--------+--------------+------------+--------+ | 1 | Rahul | 2019-07-13 | dbms | R | | 2 | Rakesh | 2019-07-28 | sql | R | | 33 | Aadil | 2019-05-13 | toc | R | | 85 | Akbar | 2019-06-20 | java | I | +--------+--------+--------------+------------+--------+ 4 rows in set (0.00 sec) mysql> select * from Fine$ +--------+------------+------+ | Rollno | Date | Amt | +--------+------------+------+ | 1 | 2019-08-07 | 125 | | 33 | 2019-08-07 | 4300 | +--------+------------+------+ 2 rows in set (0.00 sec)

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