Компьютерный практикум
по дисциплине «Базы данных»
КоП1
SET SERVEROUTPUT ON
--Лабораторная работа №1
№1
select MIN(salary) from employees;
№2
DECLARE
emp_lname employees.last_name%TYPE;
emp_sal employees.salary%TYPE;
BEGIN
select
last_name, salary
into
emp_lname, emp_sal
from
employees, departments
where
departments.department_name = 'IT' and departments.manager_id =
employees.employee_id;
DBMS_OUTPUT.PUT_LINE(‘Начальник отдела IT');
DBMS_OUTPUT.PUT_LINE('Фамилия ' || emp_lname);
DBMS_OUTPUT.PUT_LINE('Зарплата: ' || emp_sal);
END;
№3
variable emp_lname VARCHAR2(20)
variable emp_sal NUMBER
BEGIN
select
last_name, salary
into
:emp_lname, :emp_sal
from
employees, departments
where
departments.department_name = 'IT' and departments.manager_id =
employees.employee_id;
DBMS_OUTPUT.PUT_LINE('Начальник отдела IT');
DBMS_OUTPUT.PUT_LINE('Фамилия: ' || :emp_lname);
DBMS_OUTPUT.PUT_LINE('Зарплата: ' || :emp_sal);
END;
print emp_lname
print emp_sal
№4
DECLARE
sal_emp employees.salary%type;
begin
select
MIN(salary)
into
sal_emp
from employees
where job_id = 'FI_ACCOUNT';
DBMS_OUTPUT.PUT_LINE('Найден сотрудник отдела FI_ACCOUNT');
DBMS_OUTPUT.PUT_LINE('его зарплата: ' || sal_emp);
sal_emp := sal_emp + (sal_emp*0.1);
DBMS_OUTPUT.PUT_LINE('его новая зарплата: ' || sal_emp);
end;
№5
declare
v_job employees.job_id%type := 'IT_PROG';
v_start_salary employees.salary%type := 4400;
v_dept employees.department_id%type;
begin
select distinct
department_id
into
v_dept
from
employees
where job_id = v_job;
INSERT INTO EMPLOYEES (EMPLOYEE_ID, FIRST_NAME, LAST_NAME, EMAIL,
PHONE_NUMBER, HIRE_DATE, JOB_ID, SALARY, MANAGER_ID, DEPARTMENT_ID)
VALUES (1000, 'Daniil', 'Shvagirev', SomeEmail@gmail.com', '71234567890', '11.03.20', v_job,
v_start_salary+(v_start_salary*0.5), 103, v_dept);
INSERT INTO EMPLOYEES (EMPLOYEE_ID, FIRST_NAME, LAST_NAME, EMAIL,
PHONE_NUMBER, HIRE_DATE, JOB_ID, SALARY, MANAGER_ID, DEPARTMENT_ID)
VALUES (993, 'SomeName', 'Surname', 'SomeEmail1@main.com', '71231231212', '12.05.20',
v_job, v_start_salary + (v_start_salary*0.25), 103, v_dept);
INSERT INTO EMPLOYEES (EMPLOYEE_ID, FIRST_NAME, LAST_NAME, EMAIL,
PHONE_NUMBER, HIRE_DATE, JOB_ID, SALARY, MANAGER_ID, DEPARTMENT_ID)
VALUES (986, 'Tester', 'Testerov', 'tstmail@mail.com', '79085436767', '12.03.20', v_job,
v_start_salary + (v_start_salary*0.15), 103, v_dept);
end;
select * from employees;
КоП2
SET SERVEROUTPUT ON
--Лабораторная работа 2
№1
CREATE table Emp_Rate (
emp_id number,
salary number,
rate VARCHAR(50)
);
INSERT into emp_rate (emp_id, salary)
select employee_id, salary
FROM employees emp, departments dep
where emp.department_id = dep.department_id and dep.department_name = 'IT';
№2
DECLARE
TYPE list_of_salaries IS TABLE OF Emp_Rate.salary%type;
emp_salary list_of_salaries;
TYPE list_of_id IS TABLE OF Emp_Rate.emp_id%type;
e_id list_of_id;
i number := 1;
BEGIN
select
salary, emp_id
bulk collect into emp_salary, e_id
from emp_rate;
loop
update emp_rate
set rate = rpad('*', floor(emp_salary(i)/1000), '*') where TO_NUMBER(emp_rate.emp_id) =
e_id(i);
DBMS_OUTPUT.PUT_LINE (rpad('*', floor(emp_salary(i)/1000), '*'));
i:=i+1;
j:=j+1;
exit when i > emp_salary.count;
end loop;
END;
select * from emp_rate;
№3.1
DECLARE
TYPE list_of_salaries IS TABLE OF Emp_Rate.salary%type;
emp_salary list_of_salaries;
TYPE list_of_id IS TABLE OF Emp_Rate.emp_id%type;
e_id list_of_id;
i number := 1;
BEGIN
select
salary, emp_id
bulk collect into emp_salary, e_id
from emp_rate;
for i in 1..emp_salary.count loop
update emp_rate
set rate = rpad('*', floor(emp_salary(i)/1000), '*') where TO_NUMBER(emp_rate.emp_id) =
e_id(i);
DBMS_OUTPUT.PUT_LINE (rpad('*', floor(emp_salary(i)/1000), '*'));
j:=j+1;
end loop;
END;
№3.2
DECLARE
TYPE list_of_salaries IS TABLE OF Emp_Rate.salary%type;
emp_salary list_of_salaries;
TYPE list_of_id IS TABLE OF Emp_Rate.emp_id%type;
e_id list_of_id;
i number := 1;
BEGIN
select
salary, emp_id
bulk collect into emp_salary, e_id
from emp_rate;
while i < emp_salary.count loop
update emp_rate
set rate = rpad('*', floor(emp_salary(i)/1000), '*') where TO_NUMBER(emp_rate.emp_id) =
e_id(i);
DBMS_OUTPUT.PUT_LINE (rpad('*', floor(emp_salary(i)/1000), '*'));
i:=i+1;
end loop;
END;
select * from emp_rate;
№4
DROP TABLE Emp_Rate;
№5
select d.department_name, l.country_id, l.city,l.postal_code, l.street_address
from departments d, locations l
where d.location_id = l.location_id;
DECLARE
TYPE list_of_dep IS TABLE OF departments.department_name%type;
type list_of_country IS TABLE OF locations.country_id%type;
type list_of_city IS TABLE OF locations.city%type;
type list_of_state IS TABLE OF locations.STATE_PROVINCE%type;
type list_of_post IS TABLE OF locations.postal_code%type;
type list_of_addr IS TABLE OF locations.street_address%type;
dep list_of_dep;
country list_of_country;
city list_of_city;
state_pr list_of_state;
post list_of_post;
addr list_of_addr;
begin
select d.department_name, l.country_id, l.city, l.STATE_PROVINCE, l.postal_code,
l.street_address
bulk collect into dep, country, city, state_pr, post, addr
from departments d, locations l
where d.location_id = l.location_id;
for i in 1..dep.count loop
IF country(i) = 'US' THEN
DBMS_OUTPUT.PUT_LINE (i || ' ' || dep(i) || ', ' || country(i) || ', ' || city(i) || ', ' ||
state_pr(i));
ELSIF country(i) = 'DE' or country(i) = 'UK' or country(i) = 'NL' THEN
DBMS_OUTPUT.PUT_LINE (i || ' ' || dep(i) || ', ' || post(i) || ', ' || city(i) || ', ' || addr(i));
ELSE
DBMS_OUTPUT.PUT_LINE (i || ' ' || dep(i) || ', ' || post(i) || ', ' || city(i) || ' далекодалеко');
END IF;
end loop;
end;
№6
DECLARE
TYPE list_of_surname IS TABLE OF employees.last_name%type;
emp_surname list_of_surname;
i number := 1;
begin
select
last_name
bulk collect into emp_surname
from
employees
where last_name like '%n%' and commission_pct > 0.2;
dbms_output.put_line('Cписок работников, у которых фамилия содержит букву ‘n’ и
комиссионные больше 20%:');
for i in 1..emp_surname.count loop
dbms_output.put_line(emp_surname(i));
end loop;
end;
КоП3
set serveroutput ON
--Лабораторная работа #3
SELECT * FROM jobs
№1
create or replace procedure ADD_JOB(new_jobid jobs.job_id%type, new_jobtitle
jobs.job_title%type)
as
begin
insert into jobs(job_id, job_title)
values (new_jobid, new_jobtitle);
end ADD_JOB;
№2
EXECUTE ADD_JOB('IT_WEB', 'Web Master')
№3
EXECUTE ADD_JOB('ST_MAN', 'Stock Manager')
№4
CREATE table EMP (
EMPNO number,
ENAME VARCHAR(20),
JOB_TITLE VARCHAR(20),
MGR NUMBER,
HIREDATE DATE,
SAL number,
COMM NUMBER,
DEPTNO NUMBER
);
№5
create or replace procedure ADD_EMP(p_empno emp.empno%type default null, p_ename
emp.ename%TYPE default null,
p_job_title emp.job_title%TYPE := 'SALESMAN',
p_mgr emp.mgr%type default null,
p_hiredate emp.hiredate%TYPE default sysdate,
p_sal emp.sal%TYPE DEFAULT 1500,
p_comm emp.comm%TYPE default null,
p_deptno emp.deptno%type DEFAULT 30)
as
BEGIN
INSERT INTO EMP
VALUES (p_empno, p_ename, p_job_title, p_mgr, p_hiredate, p_sal, p_comm, p_deptno);
END ADD_EMP;
№6
execute ADD_EMP('1000', 'Daria');
№7
select * from emp
КоП4
SET SERVEROUTPUT ON
--Лабораторная работа #4
№1
create or replace function F_TAX(salary employees.salary%type)
return employees.salary%type
is
sal employees.salary%type;
begin
sal := salary*0.13;
return sal;
end;
select last_name, salary from employees
select last_name ‘фамилия’, F_TAX(salary) налог from employees
№2
create or replace function F_COMMISION(emp_id employees.employee_id%TYPE)
RETURN employees.commission_pct%TYPE
IS
commission employees.commission_pct%TYPE;
BEGIN
SELECT commission_pct INTO commission FROM employees WHERE employee_id = emp_id;
if commission is null then
return 0;
end if;
RETURN commission;
END F_COMMISION;
select last_name, CONCAT(F_COMMISION(employee_id)*100, '%') comm from employees
№3
create or replace function F_TAKE_COM(emp_id employees.employee_id%TYPE)
return boolean
is
begin
if F_COMMISION(emp_id) = 0 then
return false;
else
return true;
end if;
end F_TAKE_COM;
№4
declare
TYPE list_of_id IS TABLE OF employees.employee_id%type;
emp_id list_of_id;
nalog number:=0;
begin
select employee_id
bulk collect into emp_id
from employees;
for i in 1..emp_id.count loop
if F_TAKE_COM(emp_id(i)) = true then
nalog := nalog + F_TAX(emp_id(i));
end if;
end loop;
DBMS_OUTPUT.PUT_LINE('общая сумма налога равна ' || nalog);
end;
КоП5
SET SERVEROUTPUT ON
--Лабораторная работа №5
№1
CREATE OR REPLACE TRIGGER trg_check_sal AFTER
INSERT OR UPDATE OF salary ON employees
FOR EACH ROW
DECLARE
TYPE lst_job_id IS
TABLE OF jobs.job_id%TYPE;
TYPE lst_job_sal_min IS
TABLE OF jobs.min_salary%TYPE;
TYPE lst_job_sal_max IS
TABLE OF jobs.max_salary%TYPE;
job_id
lst_job_id;
max_salary lst_job_sal_max;
min_salary lst_job_sal_min;
BEGIN
SELECT
job_id,
max_salary,
min_salary
BULK COLLECT
INTO
job_id,
max_salary,
min_salary
FROM
jobs;
FOR i IN 1..job_id.count LOOP IF ( :new.job_id = job_id(i) ) THEN
IF ( ( :new.salary > max_salary(i) ) OR ( :new.salary < min_salary(i) ) ) THEN
raise_application_error(-20100, 'Зарплата выходит за пределы допустимого
диапазона');
ELSE
dbms_output.put_line('Новая зп - ' || :new.salary);
END IF;
END IF;
END LOOP;
END;
№2
SAVEPOINT old_database;
№3
ALTER TRIGGER trg_check_sal DISABLE;
ALTER TRIGGER trg_check_sal ENABLE;
DECLARE
TYPE lst_names IS
TABLE OF employees.last_name%TYPE;
TYPE lst_salaries IS
TABLE OF employees.salary%TYPE;
TYPE lst_jobs IS
TABLE OF employees.job_id%TYPE;
last_names lst_names;
salaries
lst_salaries;
max_salary lst_salaries;
jobs_id
lst_jobs;
mx_jobs_id lst_jobs;
BEGIN
SELECT
last_name,
job_id,
salary
BULK COLLECT
INTO
last_names,
jobs_id,
salaries
FROM
employees
WHERE
last_name LIKE 'L%';
SELECT
job_id,
MAX(salary)
BULK COLLECT
INTO
mx_jobs_id,
max_salary
FROM
employees
WHERE
last_name LIKE 'L%'
GROUP BY
job_id;
dbms_output.put_line('Список людей с максимальной зарплатой по должностям : ');
FOR i IN 1..last_names.count LOOP FOR j IN 1..mx_jobs_id.count LOOP
IF ( jobs_id(i) = mx_jobs_id(j) AND max_salary(j) = salaries(i) ) THEN
dbms_output.put_line(last_names(i)
|| ' '
|| jobs_id(i)
|| ' '
|| salaries(i));
END IF;
END LOOP;
END LOOP;
END;
№4
DECLARE
TYPE lst_names IS
TABLE OF employees.last_name%TYPE;
TYPE lst_salaries IS
TABLE OF employees.salary%TYPE;
TYPE lst_jobs IS
TABLE OF employees.job_id%TYPE;
last_names lst_names;
salaries
lst_salaries;
max_salary lst_salaries;
jobs_id
lst_jobs;
mx_jobs_id lst_jobs;
BEGIN
SELECT
last_name,
job_id,
salary
BULK COLLECT
INTO
last_names,
jobs_id,
salaries
FROM
employees
WHERE
last_name LIKE 'L%';
SELECT
job_id,
MAX(salary)
BULK COLLECT
INTO
mx_jobs_id,
max_salary
FROM
employees
WHERE
last_name LIKE 'L%'
GROUP BY
job_id;
dbms_output.put_line('Список людей с максимальной зарплатой по должностям:’ );
FOR i IN 1..last_names.count LOOP FOR j IN 1..mx_jobs_id.count LOOP
IF ( jobs_id(i) = mx_jobs_id(j) AND max_salary(j) = salaries(i) ) THEN
UPDATE employees
SET
salary = salaries(i) + salaries(i) * 0.5
WHERE
last_name = last_names(i);
dbms_output.put_line(last_names(i)
|| ' '
|| jobs_id(i)
|| ' '
|| salaries(i));
END IF;
END LOOP;
END LOOP;
END;
№5
ROLLBACK TO old_database;
№6
CREATE VIEW dept_loc_view AS
SELECT
d.department_name,
c.country_name,
l.city,
l.street_address
FROM
departments d,
countries
c,
locations
l
WHERE
d.location_id = l.location_id
AND c.country_id = l.country_id;
SELECT
*
FROM
dept_loc_view
№7
CREATE OR REPLACE TRIGGER DEPT_LOC_VIEW_TRIGGER
for insert or update ON DEPT_LOC_VIEW
compound trigger
dep_id number;
local_id number;
country_id varchar(40) := upper(substr(:new.country_name, 1, 2));
instead of each row is
BEGIN
INSERT INTO countries (
country_id,
country_name
) VALUES (
country_id,
:new.country_name
);
local_id := dbms_random.value(100, 1000);
INSERT INTO locations (
location_id,
city,
street_address
) VALUES (
local_id,
:new.city,
:new.street_address
);
dep_id := dbms_random.value(100, 1000);
INSERT INTO departments (
department_id,
department_name,
location_id
) VALUES (
dep_id,
:new.department_name,
local_id
);
END instead of each row;
end;
№8
INSERT INTO dept_loc_view VALUES (
'Support Service',
'Norway',
'Oslo',
'Oslo street, 14'
);
№9
SELECT
*
FROM
dept_loc_view;
№10
SELECT
*
FROM
departments d
WHERE
d.department_name = 'Support Service';
SELECT
*
FROM
countries c
WHERE
c.country_name = 'Norway';
SELECT
*
FROM
locations l
WHERE
l.city = 'Oslo';