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BEGIN TRANSACTION;
CREATE VIEW IF NOT EXISTS stock AS SELECT id, name, category, amount FROM products WHERE deprecated = 0 OR amount != 0;
CREATE VIEW IF NOT EXISTS purchaseprices AS SELECT product, SUM(price * amount) / SUM(amount) AS price FROM restock GROUP BY product;
CREATE VIEW IF NOT EXISTS invoice AS
SELECT user, timestamp, id AS productid, name AS productname,
CASE
WHEN user < 0 THEN
(SELECT SUM(price * amount) / SUM(amount)
FROM restock
WHERE restock.product = id AND restock.timestamp <= sales.timestamp
)
else
(SELECT
CASE
WHEN user=0 THEN guestprice
else memberprice
END
FROM prices
WHERE product = id AND valid_from <= timestamp
ORDER BY valid_from DESC LIMIT 1)
END AS price
FROM sales INNER JOIN products ON sales.product = products.id
ORDER BY timestamp;
CREATE VIEW IF NOT EXISTS current_cashbox_status AS
SELECT (
(
SELECT SUM(
(
SELECT guestprice
FROM prices
WHERE product = s.product AND valid_from <= s.timestamp
ORDER BY valid_from DESC LIMIT 1
)
) FROM sales s WHERE user = 0
)
+
(
SELECT SUM(amount) FROM cashbox_diff
)
) AS amount;
COMMIT;
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