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import sqlite3
def create(dbname):
conn = sqlite3.connect(dbname)
c = conn.cursor()
c.execute('''CREATE TABLE products
( id INTEGER PRIMARY KEY,
invoice_id INTEGER,
description TEXT NOT NULL,
units REAL NOT NULL,
price_unit REAL NOT NULL,
vat REAL,
FOREIGN KEY(invoice_id) REFERENCES invoices(id)
ON DELETE CASCADE )''')
# date is %Y-%m-%d
c.execute('''CREATE TABLE invoices
( id INTEGER PRIMARY KEY,
type TEXT NOT NULL,
series INTEGER NOT NULL,
date TEXT NOT NULL,
notes TEXT,
customer_id TEXT,
customer_name TEXT,
customer_address TEXT
)''')
c.execute('''CREATE TABLE taxes
( name TEXT NOT NULL,
invoice_id INTEGER,
ratio REAL,
PRIMARY KEY(name, invoice_id)
FOREIGN KEY(invoice_id) REFERENCES invoices(id)
ON DELETE CASCADE )''')
conn.commit()
conn.close()
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