drop database task1;
create database task1;
use task1

drop table Users;
create table Users (
id int auto_increment primary key,
Name varchar(15),
login varchar(20),
email varchar(20),
department ENUM('Производство', 'Поддержка пользователей', 'Управление', 'Администрация'));
describe Users;

drop table Project;
create table Project (
id int auto_increment primary key,
Name varchar(15),
Description text not null,
Date_open date not null,
Date_close date);
describe Project;

drop table Tasks;
create table Tasks (
id int auto_increment primary key,
Project_id int,
Title varchar(15),
Priority int,
Description text,
task_Condition ENUM('Новая','Переоткрыта','Выполняется','Закрыта'),     /*Condition reserved*/
Evaluation int,
Elapsed_time int,
exec_user_id int,
creat_user_id int not null,
creat_date date,
);
describe Project;

/*1-2:*/

insert into Project (Name, Date_open) values ('РТК', '2016-01-31');
insert into Project (Name, Date_open, Date_close) values ('СС.Коннект', '2016-01-31', '2016-12-31');
insert into Project (Name, Date_open, Date_close) values ('Демо-Сибирь', '2015-02-23', '2016-01-31');
insert into Project (Name, Date_open, Date_close) values ('МВД-Онлайн', '2016-05-22','2016-01-31');
insert into Project (Name, Date_open) values ('Поддержка', '2016-06-07')

insert into Users (name, login, email, department) values ('Касаткин Артем', 'kasatkin', 'kasatka@gmail.com', 'Администрация');
insert into Users (name, login, email, department) values ('Петрова София', 'petrova', 'petrova@gmail.com', 'Бухгалтерия');
insert into Users (name, login, email, department) values ('Дроздов Федр', 'drosdov', 'drosdov@gmail.com', 'Поддержка пользователей');
insert into Users (name, login, email, department) values ('Иванова', 'Василина', 'ivanova', 'ivanova@gmail.com', 'Бухгалтерия');
insert into Users (name, login, email, department) values ('Беркут Алексей', 'aerkut', 'berkut@gmail.com', 'Управление');
insert into Users (name, login, email, department) values ('Белова Вера', 'velova', 'belova@gmail.com', 'Управление');
insert into Users (name, login, email, department) values ('Макенрой Алексей', 'makenroy', 'makenroy@gmail.com', 'Управление');

/*insert Tasks*//*TODO*/

/*1-3:*/

select * from Tasks;

select Name, department from Users;

select login, email from Users;

/*d*/select Title from Tasks where Priority>50;

select Name from Users INNER JOIN Tasks ON Tasks.exec_user_id = Users.id; /*  */

/*select distinct exec_user_id,create_user_id from Tasks INNER JOIN Task ON exec_user_id!=create_user_id union select distinct exec_user_id,create_user_id from Tasks INNER JOIN Task ON exec_user_id=create_user_id; */

(select distinct exec_user_id from Tasks where exec_user_id not in (select distinct created_by from tasks)) union (select created_by from tasks);

/*1-4:*/

select * from Tasks where exec_user_id = (select id from Users where name = 'Касаткин Артем') and creat_date in ('2016-01-01','2016-01-02','2016-01-03');

/*1-5:*/

select * from Tasks where exec_user_id = (select id from Users where name = 'Петрова София') and creat_user_id in (select id from Users where department in ('Администрация', 'Бухгалтерия', 'Развитие'));

/*1-6:*/

/*b:creat_user_id int not null */

insert into Tasks (creat_user_id) values ('1'); /*TODO*/

select * from Tasks where exec_user_id is null;

update Tasks set exec_user_id = (select id from Users where name = 'Петрова София') where exec_user_id is null;

/*1-7:*/


create table Tasks2 like Tasks;

insert Tasks2 select * from Tasks; /*id:umvr*/

/*1-8:*/

select * from Users where Name not like '%а' and Name not like '%a %';

select * from Users where login like 'p%' and login like '%r%';