Trigger lanza excepcion
Publicado por Ale (1 intervención) el 25/11/2018 12:47:13
Necesito crear un Trigger para la tabla 'project q lance una excepcion cuando un departament assigna mas de tres projectos. Creo q tendria q utilizar 'create trigger before insert on' pero nose como aplicarlo ni comprobar.
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CREATE SCHEMA "COMPANY";set search_path = 'COMPANY';
CREATE TABLE DEPARTMENT
(DNAME VARCHAR (20) UNIQUE,
DNUMBER INTEGER NOT NULL,MGRSSN CHAR (9),
MGRSTARTDATE DATE,PRIMARY KEY (DNUMBER)
);INSERT INTO DEPARTMENT (DNAME,
DNUMBER, MGRSSN, MGRSTARTDATE)VALUES ('Research',
5,'333445555',
'1988-05-22');
INSERT INTO DEPARTMENT (DNAME,
DNUMBER, MGRSSN, MGRSTARTDATE)VALUES ('Administration',
4,'987654321',
'1995-01-01');
INSERT INTO DEPARTMENT (DNAME,
DNUMBER, MGRSSN, MGRSTARTDATE)VALUES ('Headquarters',
1,'888665555',
'1981-06-19');
CREATE TABLE EMPLOYEE
(FNAME varchar (20),
MINIT varchar (1),
LNAME varchar (20),
SSN char (9),
BDATE date,ADDRESS varchar (30),
SEX CHAR (1) default 'M' check (sex in ('M','F')),
SALARY decimal(9,2),
SUPERSSN char (9),
DNO integer,PRIMARY KEY (SSN)
);INSERT INTO EMPLOYEE (FNAME,
MINIT, LNAME, SSN, BDATE, ADDRESS, SEX, SALARY, SUPERSSN, DNO)VALUES ('John',
'B',
'Smith',
'123456789',
'1965-01-09',
'731 Fondren, Houston, TX',
'M',
30000,'333445555',
5);INSERT INTO EMPLOYEE (FNAME,
MINIT, LNAME, SSN, BDATE, ADDRESS, SEX, SALARY, SUPERSSN, DNO)VALUES ('FranWin',
'T',
'Wong',
'443445555',
'1955-12-08',
'638 Voss, Houston, TX',
'M',
40000,'888665555',
5);INSERT INTO EMPLOYEE (FNAME,
MINIT, LNAME, SSN, BDATE, ADDRESS, SEX, SALARY, SUPERSSN)VALUES ('Alicia',
'J',
'Zelaya',
'999887777',
' 1968-07-19',
'3321 Castle, Spring, TX',
'F',
25000,'987654321');
INSERT INTO EMPLOYEE (FNAME,
MINIT, LNAME, SSN, BDATE, ADDRESS, SEX, SALARY, SUPERSSN, DNO)VALUES ('Jennifer',
'S',
'Wallace',
'987654321',
' 1941-06-20',
' 291 Berry, Bellaire, TX',
'F',
43000,'888665555',
4);INSERT INTO EMPLOYEE (FNAME,
MINIT, LNAME, SSN, BDATE, ADDRESS, SEX, SALARY, SUPERSSN, DNO)VALUES ('Ramesh',
'K',
'Narayan',
'666884444',
' 1962-09-15 ',
' 975 Fire Oak, Humble, TX',
'M',
38000,'333445555',
5);INSERT INTO EMPLOYEE (FNAME,
MINIT, LNAME, SSN, BDATE, ADDRESS, SEX, SALARY, SUPERSSN, DNO)VALUES ('Joyce',
'A',
'English',
'453453453',
' 1972-07-31 ',
' 5631 Rice, Houston, TX',
'F',
25000,'333445555',
5);INSERT INTO EMPLOYEE (FNAME,
MINIT, LNAME, SSN, BDATE, ADDRESS, SEX, SALARY, SUPERSSN, DNO)VALUES ('James',
'E',
'Borg',
'888665555',
' 1937-11-10 ',
' 450 Stone, Houston, TX',
'M',
55000,'null',
NULL);CREATE TABLE DEPT_LOCATIONS
( DNUMBER INTEGER NOT NULL,DLOCATION VARCHAR (15),
PRIMARY KEY (DNUMBER, DLOCATION)
);INSERT INTO DEPT_LOCATIONS (DNUMBER, DLOCATION)
VALUES (1, 'Houston');
INSERT INTO DEPT_LOCATIONS (DNUMBER, DLOCATION)
VALUES (4, 'Stafford');
INSERT INTO DEPT_LOCATIONS (DNUMBER, DLOCATION)
VALUES (5, 'Bellaire');
INSERT INTO DEPT_LOCATIONS (DNUMBER, DLOCATION)
VALUES (5, 'Sugarland');
INSERT INTO DEPT_LOCATIONS (DNUMBER, DLOCATION)
VALUES (5, 'Houston');
CREATE TABLE DEPENDENT
(ESSN CHAR (9),
DEPENDENT_NAME VARCHAR (20),
SEX CHAR (1),
BDATE DATE,RELATIONSHIP VARCHAR (20),
PRIMARY KEY (ESSN, DEPENDENT_NAME)
);INSERT INTO DEPENDENT (ESSN,
DEPENDENT_NAME, SEX, BDATE, RELATIONSHIP)VALUES ('333445555',
'Alice',
'F',
' 1986-04-05',
' DAUGHTER');
INSERT INTO DEPENDENT (ESSN,
DEPENDENT_NAME, SEX, BDATE, RELATIONSHIP)VALUES ('333445555',
' theodore',
'M',
'1983-10-25',
'SON');
INSERT INTO DEPENDENT (ESSN,
DEPENDENT_NAME, SEX, BDATE, RELATIONSHIP)VALUES ('333445555',
'Joy',
'F',
'1958-05-03',
'SPOUSE');
INSERT INTO DEPENDENT (ESSN,
DEPENDENT_NAME, SEX, BDATE, RELATIONSHIP)VALUES ('987654321',
' Abner',
'M',
'1942-02-28',
'SPOUSE');
INSERT INTO DEPENDENT (ESSN,
DEPENDENT_NAME, SEX, BDATE, RELATIONSHIP)VALUES ('123456789',
' Michael',
'M',
'1988-01-04',
'SON');
INSERT INTO DEPENDENT (ESSN,
DEPENDENT_NAME, SEX, BDATE, RELATIONSHIP)VALUES ('123456789',
' Alice ',
'F',
'1988-12-30',
'DAUGHTER');
INSERT INTO DEPENDENT (ESSN,
DEPENDENT_NAME, SEX, BDATE, RELATIONSHIP)VALUES ('123456789',
'Elizabeth',
'F',
'1967-05-05',
'SPOUSE');
CREATE TABLE WORKS_ON
(ESSN CHAR (9) NOT NULL,
PNO INTEGER NOT NULL, HOURS INTEGER,PRIMARY KEY (ESSN, PNO)
);CREATE TABLE PROJECT
(PNAME VARCHAR (20) NOT NULL,
PNUMBER INTEGER,PLOCATION VARCHAR (15),
DNUM INTEGER,PRIMARY KEY (PNUMBER)
);INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('123456789', 1, 32.5);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('123456789', 2, 7.5);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('666884444', 3, 40.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('453453453', 1, 20.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('453453453', 2, 20.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('333445555', 2, 10.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('3334455S5', 3, 10.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('333445555', 10, 10.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('333445555', 20, 10.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('999887777', 30, 30.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('999887777', 10, 10.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('987987987', 10, 35.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('987987987', 30, 5.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('987654321', 30, 20.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('987654321', 20, 15.0);
INSERT INTO WORKS_ON (ESSN, PNO, HOURS)
VALUES ('881366555', 20, NULL);
INSERT INTO PROJECT (PNAME,
PNUMBER, PLOCATION, DNUM)VALUES ('ProductX',
1,'Bellaire',
5);INSERT INTO PROJECT (PNAME,
PNUMBER, PLOCATION, DNUM)VALUES ('ProductY',
2,'Sugarland',
5);INSERT INTO PROJECT (PNAME,
PNUMBER, PLOCATION, DNUM)VALUES ('ProductZ',
3,'Houston ',
5);INSERT INTO PROJECT (PNAME,
PNUMBER, PLOCATION, DNUM)VALUES ('Computerization',
10,'Stafford',
4);INSERT INTO PROJECT (PNAME,
PNUMBER, PLOCATION, DNUM)VALUES ('Reorganization',
20,'Houston',
1);INSERT INTO PROJECT (PNAME,
PNUMBER, PLOCATION, DNUM)VALUES ('Newbenef its',
30,'Stafford',
4);Valora esta pregunta
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