The following practical s have to be performed and journal should contain the output with aim as per syllabus. This is just for reference

Size: px

Start display at page:

Download "The following practical s have to be performed and journal should contain the output with aim as per syllabus. This is just for reference"

Ashley Lee
6 years ago
Views:

1 The following practical s have to be performed and journal should contain the output with aim as per syllabus. This is just for reference Solution for cursors 1. Write PLSQL block to create a cursor to get empid, ename, empsalary and store the values in the table named employees details. create table employees_details(empid number(20), empname varchar2(20), empsalary number(20)); empid emp.empno%type; empname emp.ename%type; empsalary emp.sal%type; CURSOR e_employee is SELECT empno, ename, sal FROM emp; BEGIN OPEN e_employee; LOOP FETCH e_employee into empid, empname, empsalary; insert into employees_details values(empid,empname,empsalary); EXIT WHEN e_employee%notfound; END LOOP; CLOSE e_employee; 2. Write a PLSQL program to create a procedure to find odd number of employees and insert them into the tables. Use cursor to fetch the data of the odd number of the employees. create table odd_employees(empid number(20), empname varchar2(20), empsalary number(20)); Create or Replace Procedure odd1 IS empid emp.empno%type; empname emp.ename%type; empsalary emp.sal%type; CURSOR e_employee is SELECT empno, ename, sal FROM emp;

2 BEGIN OPEN e_employee; LOOP FETCH e_employee into empid, empname, empsalary; IF mod(empid,2)!=0 then insert into odd_employees values(empid,empname,empsalary); END IF; EXIT WHEN e_employee%notfound; END LOOP; CLOSE e_employee; Execute odd1; 3. Write a PLSQL program to create a cursor to fetch first 10 records from employee and insert it into add_emp table using loop. create table add_emp(empid number(20), empname varchar2(20), empsalary number(20)); empid emp.empno%type; empname emp.ename%type; empsalary emp.sal%type; CURSOR e_employee is SELECT empno, ename, sal FROM emp; BEGIN OPEN e_employee; For i in LOOP FETCH e_employee into empid, empname, empsalary; insert into add_emp values(empid,empname,empsalary); END LOOP; CLOSE e_employee;

3 4. Write a PLSQL block to write a program to update a table and display the rowcount using implicit cursor. rowcount number(2); BEGIN UPDATE add_emp SET empsalary = empsalary + 200; IF sql%notfound THEN dbms_output.put_line('no employees selected'); ELSIF sql%found THEN rowcount := sql%rowcount; dbms_output.put_line( rowcount ' employees selected '); END IF; 5. Write a PLSQL function returning cursor, if the value in the parameter is Dept it should return all rows of the department table and if parameter is emp it should return all rows of employee table. Run this function using anonymous PLSQL block. Create or replace function emp_dept_details(emp_dept varchar2) Return SYS_REFCURSOR is L_name SYS_REFCURSOR; Case emp_dept when 'emp' then open L_name for Select empid,empname,empsalary from employees_details; when 'dept' then open L_name for Select department_id, department_name, location_id from department; End Case; return L_name;

4 Declare L_name SYS_REFCURSOR; a number(10); b varchar2(30); c number(10); L_name:=emp_dept_details('emp'); Loop fetch L_name into a,b,c; Exit when L_name%notfound; dbms_output.put_line(a ' ' b ' ' c); End Loop; 6. Write a PLSQL block to print employee details from table employee. Accept the emp_id from the user and print the details (use cursors). CURSOR record(a number) is Select empname,empsalary from employees_details where empid=a; begin temp employees_details%rowtype; id number:= &empid; for temp in record(id) loop dbms_output.put_line(temp.empname); dbms_output.put_line(temp.empsalary); End loop;

5 7. Create a table product_details(product_id*, product_name,price), customer_details(cust_id*, cust_name, cust_phone_no, cust_address, Product_id#). Insert the 10 records in both table. Write a PLSQL block to accept product_name from the user and check which customer has ordered that item. If the product_name is present then display the customer names along with price and item_details by using cursors. Create table product_details1(product_id number(4) primary key,product_name varchar2(20),price number(20)); create table customer_details1(cust_id number(4) primary key, cust_name varchar2(20),cust_phone_no number(10),cust_address varchar2(20), Product_id number(5) constraints xyz references product_details1(product_id)); Declare p_nm varchar2(20):='&product_name'; cursor c(a varchar2) is select product_name from product_details1 where product_name=a; cursor e (b varchar2) is select product_name,price from product_details1 where product_name=b; temp customer_details1%rowtype; temp1 product_details1%rowtype; p_nm1 varchar2(20); cursor d(c varchar2) is select cust_name from customer_details1 where product_id=(select product_id from product_details1 where product_name=c); open c(p_nm); fetch c into p_nm1; if c%notfound then dbms_output.put_line('does not exist'); else for temp1 in e(p_nm) loop dbms_output.put_line('...product name...'); dbms_output.put_line(temp1.product_name); dbms_output.put_line(temp1.price); dbms_output.put_line('...');

6 end loop; dbms_output.put_line('...customer name...'); for temp in d(p_nm) loop dbms_output.put_line(temp.cust_name); end loop; end if; 8. Write a PLSQL block to accept job_id from the user and give details of all employees having that job id. Use parameterized cursor. Display details in descending order f emp_name. Create the following tables Customer{c_id*,c_name,c_phone_no} Order{o_id*,price,c_id#} Transaction{t_id*,sysdate,c_id#,amount} Declare cursor a (b varchar2) is Select * from employees where job_id=b order by first_name desc; c employees%rowtype; d varchar2(20):='&job_id'; Open a(d); Fetch a into c; while(a%found) loop dbms_output.put_line(c.first_name ' ' c.employee_id); Fetch a into c; End loop; Close a;

INDEX. 1 Introduction. 2 Types of Cursors 2.1 Explicit cursor 2.2 Attributes 2.3 Implicit cursor 2.4 Attributes. 3 Parameterized cursor

INDEX. 1 Introduction. 2 Types of Cursors 2.1 Explicit cursor 2.2 Attributes 2.3 Implicit cursor 2.4 Attributes. 3 Parameterized cursor INDEX 1 Introduction 2 Types of Cursors 2.1 Explicit cursor 2.2 Attributes 2.3 Implicit cursor 2.4 Attributes 3 Parameterized cursor INTRODUCTION what is cursor? we have seen how oracle executes an SQL