Question

Python，PySide，SQLite：

我可能错过了一些明显的东西，但我得到了相同（或者我认为）查询的不同结果。我应该看到未准备好的查询的结果（afaik）。

感谢您的帮助！

制备

    filteringCategory = "store"
    from_date = '2014-03-01'
    to_date = '2014-03-29'
    query.prepare("SELECT s.name AS store, SUM(price) AS total_price FROM expenses AS e JOIN expenses_to_store AS ets ON e.expenses_id = ets.expenses_id JOIN store AS s ON ets.store_id = s.store_id WHERE date BETWEEN :from_date AND :to_date GROUP BY :group")
    query.bindValue(":from_date", from_date)
    query.bindValue(":to_date", to_date)
    query.bindValue(":group", filteringCategory)
    query.exec_()

非制备：

query.exec_("SELECT price, s.name AS store, SUM(price) AS total_price FROM expenses AS e JOIN expenses_to_store AS ets ON e.expenses_id = ets.expenses_id JOIN store AS s ON ets.store_id = s.store_id WHERE date BETWEEN '2014-03-01' AND '2014-03-29' GROUP BY store")

query result http://oi62.tinypic.com/1dy0l1.jpg

Answer 1

问题可能在于：

    query.bindValue(":group", filteringCategory)

尝试绑定不是值的参数。我不认为允许绑定列或表名，因为这会改变SQL语句的实际结构。

相反，您需要执行以下操作：

    "SELECT ... :from_date AND :to_date GROUP BY %s" % filteringCategory

SQLite准备与未准备的查询 - 不同的结果（PySide，python）

1 个答案: