Question

我正在尝试运行以下代码来复制所有行中的订单量总和。我试图在过去的两个星期中这样做，这意味着我应该获得14行数据。但是，我得到了很多重复项，并且GROUP BY无法正常工作。有人可以帮我吗？谢谢！

SELECT
TO_CHAR(DATE_TRUNC('week',START_OF_PERIOD_LOCAL),'YYYY-MM-DD') AS WEEK,
TO_CHAR(START_OF_PERIOD_LOCAL , 'DY') AS DAY_OF_WEEK,
sum(ORDERS_DELIVERED) over () as total_orders
FROM p
WHERE
CITY_NAME='Hong Kong' AND
DATEDIFF('DAY',DATE_TRUNC('DAY',CURRENT_TIMESTAMP),DATE_TRUNC('DAY',START_OF_PERIOD_LOCAL)) BETWEEN -14 AND 0
GROUP BY 1,2
ORDER BY 1

sample results

Ideal Results

Answer 1

要删除重复项，您需要使用distinct。请尝试以下操作：

func encrypty(data value: String) -> EncryptionResult {

    guard var messageData = value.data(using: .utf8), var key = getSecretkey()?.data(using: .utf8)  else {
        return EncryptionResult.failure
    }
    //iv ata
    guard let ivData = generateRandomBytes(of: Int32(SecurityConstants.blockSize))?.data(using: .utf8) else {
        return EncryptionResult.failure
    }
    //output
    var outputData = Data(count: (messageData.count + SecurityConstants.blockSize + ivData.count))
    var localOutput = outputData
    //output length
    var outputLength: size_t = 0

    //encyrption
    let status = key.withUnsafeBytes { keyBytes in
        messageData.withUnsafeBytes { messageBytes in
            localOutput.withUnsafeMutableBytes { mutableOutput in
                ivData.withUnsafeBytes { ivDataBytes in
                    CCCrypt( CCOperation(kCCEncrypt),
                             CCAlgorithm(kCCAlgorithmAES128),
                             CCOptions(kCCOptionPKCS7Padding),
                             keyBytes,
                             key.count,
                             ivDataBytes,
                             messageBytes,
                             messageData.count,
                             mutableOutput,
                             outputData.count,
                             &outputLength)
                }
            }
        }
    }
    guard status == Int32(kCCSuccess) else {
        logError("Error in encryption")
        return EncryptionResult.failure
    }
    outputData.count = outputLength
    return EncryptionResult.success(value: outputData.base64EncodedString())
}

如何删除窗口函数用法中的重复值？

1 个答案: