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Your MySQL connection id is 4
Server version: 5.5.17 MySQL Community Server (GPL)
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mysql> CREATE DATABASE EMPREL;
Query OK, 1 row affected (0.01 sec)
mysql> USE EMPREL;
Database changed
mysql> CREATE TABLE Empregado (
-> Matricula char(5) PRIMARY KEY,
-> Nome varchar(30),
-> numDepto int
-> );
Query OK, 0 rows affected (0.06 sec)

mysql> CREATE TABLE Departamento (
-> numDepto int UNIQUE,
-> nomeDepto varchar(30)
-> );
Query OK, 0 rows affected (0.06 sec)
mysql> ALTER TABLE Empregado ADD CONSTRAINT fk_empregado_depto
-> FOREIGN KEY (numDepto) REFERENCES Departamento(numDepto);
Query OK, 0 rows affected (0.13 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql> INSERT INTO Departamento VALUES (1, 'Vendas');
Query OK, 1 row affected (0.02 sec)
mysql> INSERT INTO Departamento VALUES (2, 'Marketing');
Query OK, 1 row affected (0.02 sec)
mysql> INSERT INTO Departamento VALUES (3, 'Contabilidade');
Query OK, 1 row affected (0.03 sec)
mysql> INSERT INTO Departamento VALUES (4, 'RH');
Query OK, 1 row affected (0.01 sec)
mysql> INSERT INTO Empregado VALUES ('11111', 'Ana', 1);
Query OK, 1 row affected (0.01 sec)
mysql> INSERT INTO Empregado VALUES ('22222', 'Beth', 3);
Query OK, 1 row affected (0.02 sec)
mysql> INSERT INTO Empregado VALUES ('33333', 'Carla', 3);
Query OK, 1 row affected (0.01 sec)
mysql> INSERT INTO Empregado VALUES ('44444', 'Danny', 4);
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO Empregado VALUES ('55555', 'Eliane', 4);
Query OK, 1 row affected (0.03 sec)
mysql> INSERT INTO Empregado VALUES ('66666', 'Fatima', NULL);
Query OK, 1 row affected (0.01 sec)
mysql> ALTER TABLE Departamento ADD TotalEmpregados int;
Query OK, 4 rows affected (0.14 sec) Records: 4 Duplicates: 0 Warnings: 0
mysql> /* IMPORTANTE! Nesse ponto, entra um comando SQL que será cobrado na questão 26. */
mysql> Delimiter //
mysql> CREATE TRIGGER alteraDepto1
-> AFTER INSERT ON Empregado
-> FOR EACH ROW
-> BEGIN
-> IF (NEW.numDepto IS NOT NULL) THEN
-> UPDATE departamento
-> SET TotalEmpregados = TotalEmpregados + 1
-> WHERE departamento.numDepto = NEW.numDepto;
-> END IF;
-> END//
Query OK, 0 rows affected (0.00 sec)
mysql> Delimiter ;
mysql> INSERT INTO Empregado values ('77777', 'Gabriela', 3);
Query OK, 1 row affected (0.03 sec)
mysql> Delimiter //
mysql> CREATE TRIGGER alteraDepto2
-> AFTER DELETE ON Empregado
-> FOR EACH ROW
-> BEGIN
-> IF (OLD.numDepto IS NOT NULL) THEN
-> UPDATE Departamento
-> SET totalEmpregados = totalEmpregados - 1
-> WHERE Departamento.numDepto = OLD.numDepto;
-> END IF;
-> END//
Query OK, 0 rows affected (0.03 sec)
mysql> Delimiter ;
mysql> DELETE FROM Empregado WHERE Matricula = '77777';
Query OK, 1 row affected (0.03 sec)