A new way to solve complex SQL

[yonghe wang]

github: https://github.com/braisdom/ObjectiveSql

Java codes:

Order.Table orderTable = Order.asTable();
Select select = new Select();

select.project(sum(orderTable.amount) / sum(orderTable.quantity) * 100)
        .from(orderTable)
        .where(orderTable.quantity > 30 &&
            orderTable.salesAt.between("2020-10-10 00:00:00", "2020-10-30
23:59:59"))
        .groupBy(orderTable.productId);

SQL generated:

SELECT ((((SUM(`T0`.`amount` ) / SUM(`T0`.`quantity` ) )) * 100))
FROM `orders` AS `T0`
WHERE ((`T0`.`quantity` > 30) AND
       `T0`.`sales_at` BETWEEN '2020-10-10 00:00:00' AND '2020-10-30
23:59:59')
GROUP BY `T0`.`product_id`

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