create table oracle
CREATE TABLE ot.persons(
person_id NUMBER GENERATED BY DEFAULT AS IDENTITY,
first_name VARCHAR2(50) NOT NULL,
last_name VARCHAR2(50) NOT NULL,
PRIMARY KEY(person_id)
);create table oracle
CREATE TABLE ot.persons(
person_id NUMBER GENERATED BY DEFAULT AS IDENTITY,
first_name VARCHAR2(50) NOT NULL,
last_name VARCHAR2(50) NOT NULL,
PRIMARY KEY(person_id)
);sql table
CREATE TABLE utilisateur
(
id INT PRIMARY KEY NOT NULL,
nom VARCHAR(100),
prenom VARCHAR(100),
email VARCHAR(255),
date_naissance DATE,
pays VARCHAR(255),
ville VARCHAR(255),
code_postal VARCHAR(5),
nombre_achat INT
)oracle sql create table
/*Deleting whole table with data */
DROP TABLE vehicles;
DROP TABLE owners;
/*First create only this table */
CREATE TABLE owners (
owner_id NUMBER,
first_name VARCHAR2(50 CHAR) NOT NULL,
CONSTRAINT owners_pk PRIMARY KEY(owner_id)
);
/* One owner got many vehicles, one to many relation
or one vehicle got many owners */
CREATE TABLE vehicles (
vehicle_id NUMBER,
vehicle_name VARCHAR2(50 CHAR) NOT NULL,
/* CONSTRAINT vehicle_pk PRIMARY KEY(vehicle_id) --If we had made PRIMARY KEY here it will be one to one relation */
CONSTRAINT vehicle_owner_fk FOREIGN KEY(vehicle_id) REFERENCES owners(owner_id) ON DELETE SET NULL
);
INSERT INTO owners VALUES(1, 'Abbi');
INSERT INTO owners VALUES(2, 'Beatrix');
INSERT INTO owners VALUES(3, 'Caila');
INSERT INTO owners VALUES(4, 'Dea');
INSERT INTO owners VALUES(5, 'Elise');
INSERT INTO vehicles VALUES(1, 'car');
INSERT INTO vehicles VALUES(2, 'motorcycle');
INSERT INTO vehicles VALUES(3, 'airplane1');
INSERT INTO vehicles VALUES(4, 'airplane1');
INSERT INTO vehicles VALUES(4, 'steamer');
INSERT INTO vehicles VALUES(4, 'submarine');
COMMIT;
DELETE FROM projects WHERE vehicle_id = 4 AND vehicle_name = 'submarine';
/*
Sometimes Oracle SQL Dev don't like this sign ';',
Primary Key is always NOT NULL UNIQUE,
single PK PRIMARY KEY(user_id), allowed combination:
(1,1) for example (user_id, project_id)
(2,1)
(3,1)
(4,2)
*/
-- one line commentCopyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
