Проект «SnakeProject» Михаила Козлова

⇒ SQL\T-SQL ⇐

CISCO

Voice(Asterisk\Cisco)

Microsoft

Powershell

Python

FreeBSD and Nix

1С

Общая

WEB Разработка

ORACLE SQL \ JAVA

Мото

Join в MySQL

Рассмотрены примеры с оператором JOIN в MySQL:

CREATE TABLE peoples (Name VARCHAR(20), DepID INT);
CREATE TABLE department (Dep CHAR(2), DepID INT);
INSERT INTO peoples (Name, DepID)
    VALUES ('Alex', 1),
            ('Dima', 1),
            ('Ira', 2),
            ('Vika', 2),
            ('Igor', 3),
            ('Lex', 5);
INSERT INTO department (Dep, DepID)
    VALUES ('IT', 1),
            ('MN', 2),
            ('HR', 3),
            ('TD', 4);
SELECT peoples.Name, department.Dep
FROM peoples
    INNER JOIN department ON 
        peoples.DepID = department.DepID;
SELECT peoples.Name, department.Dep
FROM peoples
    LEFT OUTER JOIN department ON 
        peoples.DepID = department.DepID;
SELECT peoples.Name, department.Dep
FROM peoples
    RIGHT OUTER JOIN department ON 
        peoples.DepID = department.DepID;
SELECT peoples.Name, department.Dep
FROM peoples
    RIGHT OUTER JOIN department ON 
        peoples.DepID = department.DepID
WHERE department.DepID = 1;

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