将 Oracle 转换为 SQLite

-- Written by IntoSQL from a Oracle dump. Load it with: sqlite3 -bail <database> < <file>
PRAGMA foreign_keys = OFF;
PRAGMA synchronous = OFF;
BEGIN;

CREATE TABLE customers ( -- People who bought at least once
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(150) NOT NULL,
    country VARCHAR(2) DEFAULT 'US' NOT NULL,
    is_active INTEGER DEFAULT 1 NOT NULL,
    signed_up DATETIME,
    created_at DATETIME DEFAULT (datetime('now', 'localtime')) NOT NULL,
    CONSTRAINT customers_check1 CHECK (is_active IN (0, 1))
);

CREATE TABLE orders (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    customer_id INTEGER NOT NULL,
    invoice INTEGER,
    status VARCHAR(10) DEFAULT 'pending' NOT NULL,
    total DECIMAL(10,2) NOT NULL,
    items INTEGER DEFAULT 1 NOT NULL,
    ordered_at DATETIME NOT NULL,
    shipped_at DATETIME,
    note VARCHAR(255),
    CONSTRAINT orders_check1 CHECK (status IN ('pending', 'paid', 'shipped', 'cancelled')),
    CONSTRAINT orders_customer_fk FOREIGN KEY (customer_id) REFERENCES customers (id)
);

INSERT INTO customers (id, name, email, country, is_active, signed_up, created_at) VALUES
(1,'Ana Martínez','ana@example.com','MX',1,'2023-01-15 00:00:00','2023-01-15 10:24:00.000000000');
INSERT INTO customers (id, name, email, country, is_active, signed_up, created_at) VALUES
(2,'Zoë Müller','zoe@example.de','DE',1,'2023-02-03 00:00:00','2023-02-03 08:11:42.000000000');
INSERT INTO customers (id, name, email, country, is_active, signed_up, created_at) VALUES
(3,'José Peña','jose@example.es','ES',0,'2023-03-21 00:00:00','2023-03-21 19:05:17.000000000');
INSERT INTO customers (id, name, email, country, is_active, signed_up, created_at) VALUES
(4,'李雷','lilei@example.cn','CN',1,'2023-05-09 00:00:00','2023-05-09 02:40:00.000000000');
INSERT INTO customers (id, name, email, country, is_active, signed_up, created_at) VALUES
(5,'Noah O''Brien','noah@example.ie','IE',1,NULL,'2023-06-30 14:00:00.000000000');
INSERT INTO customers (id, name, email, country, is_active, signed_up, created_at) VALUES
(6,'Amélie Laurent','amelie@example.fr','FR',1,'2024-01-02 00:00:00','2024-01-02 09:30:00.000000000');
INSERT INTO customers (id, name, email, country, is_active, signed_up, created_at) VALUES
(7,'Ravi Patel','ravi@example.in','IN',0,'2024-02-29 00:00:00','2024-02-29 23:59:59.000000000');
INSERT INTO customers (id, name, email, country, is_active, signed_up, created_at) VALUES
(8,'Sofia Rossi 🌻','sofia@example.it','IT',1,'2024-04-12 00:00:00','2024-04-12 12:12:12.000000000');
INSERT INTO orders (id, customer_id, invoice, status, total, items, ordered_at, shipped_at, note) VALUES
(1,1,1000,'shipped',129.9,3,'2024-03-01 10:00:00','2024-03-02 16:30:00',NULL);
INSERT INTO orders (id, customer_id, invoice, status, total, items, ordered_at, shipped_at, note) VALUES
(2,2,1001,'paid',54,1,'2024-03-02 11:15:00',NULL,'Gift wrap 🎁');
INSERT INTO orders (id, customer_id, invoice, status, total, items, ordered_at, shipped_at, note) VALUES
(3,1,1002,'cancelled',12.5,1,'2024-03-03 09:45:00',NULL,'Customer changed their mind');
INSERT INTO orders (id, customer_id, invoice, status, total, items, ordered_at, shipped_at, note) VALUES
(4,4,1003,'shipped',980,12,'2024-03-05 02:10:00','2024-03-07 08:00:00','请小心轻放');
INSERT INTO orders (id, customer_id, invoice, status, total, items, ordered_at, shipped_at, note) VALUES
(5,5,1004,'pending',45.75,2,'2024-03-08 17:20:00',NULL,'Leave at the door; ring twice');
INSERT INTO orders (id, customer_id, invoice, status, total, items, ordered_at, shipped_at, note) VALUES
(6,6,1005,'shipped',310.4,5,'2024-03-10 13:00:00','2024-03-11 09:00:00','Fragile: "glass"');
INSERT INTO orders (id, customer_id, invoice, status, total, items, ordered_at, shipped_at, note) VALUES
(7,8,1006,'paid',76.2,2,'2024-03-11 18:45:00',NULL,NULL);
INSERT INTO orders (id, customer_id, invoice, status, total, items, ordered_at, shipped_at, note) VALUES
(8,2,1007,'paid',19.99,1,'2024-03-12 08:00:00',NULL,'Paid at the counter');
INSERT INTO orders (id, customer_id, invoice, status, total, items, ordered_at, shipped_at, note) VALUES
(9,3,1008,'shipped',64,2,'2024-03-14 15:30:00',NULL,'Shipping date never recorded');
INSERT INTO orders (id, customer_id, invoice, status, total, items, ordered_at, shipped_at, note) VALUES
(10,7,1009,'paid',1499,1,'2024-03-15 21:05:00',NULL,'C:\Users\ravi\invoice.pdf');

-- Indexes, triggers and counters, after the rows so each index builds once.
CREATE UNIQUE INDEX customers_customers_email_uk ON customers (email);
CREATE INDEX orders_orders_status_date_ix ON orders (status, ordered_at);
UPDATE sqlite_sequence SET seq = max(seq, 0) WHERE name = 'customers';
INSERT INTO sqlite_sequence (name, seq) SELECT 'customers', 0 WHERE NOT EXISTS (SELECT 1 FROM sqlite_sequence WHERE name = 'customers');
UPDATE sqlite_sequence SET seq = max(seq, 0) WHERE name = 'orders';
INSERT INTO sqlite_sequence (name, seq) SELECT 'orders', 0 WHERE NOT EXISTS (SELECT 1 FROM sqlite_sequence WHERE name = 'orders');
COMMIT;

-- Rows whose foreign key finds no parent, if any: the load doesn't stop for them.
PRAGMA foreign_key_check;