Question

我试图将值插入结算表格。对于BillingAmount，我希望根据客人退房的时间进行更改。如果客人在中午之前退房，那么我希望BillingAmount只是QuotedRate乘以他们住的晚数。如果客人在下午1:00之后退房，那么我希望加收50％的附加费。对于退房时间，我只使用当前的系统时间。简而言之，我试图在INSERT INTO查询中使用IF语句。但是，我一直在IF语句中遇到语法错误。我将如何格式化以消除任何语法错误？任何帮助将不胜感激。

SET IDENTITY_INSERT Billing OFF
INSERT INTO Billing (FolioID, BillingCategoryID, BillingDescription, BillingAmount, BillingItemQty, BillingItemDate)
VALUES(24
       , 1
       , 'Room'
       , IF(CAST(GETDATE() as time) < '12:00 PM')
            SELECT QuotedRate * Nights AS "TotalLodging"
            FROM Folio
         ELSE IF(CAST(GETDATE() as time) > '1:00 PM')
            SELECT (QuotedRate * Nights) + ((QuotedRate * Nights) * .50) AS "TotalLodging"
            FROM Folio
       , 1
       , GETDATE());

Answer 1

你走了！这是你的SQL。

SET IDENTITY_INSERT Billing OFF

INSERT INTO Billing 
(
    FolioID
    , BillingCategoryID
    , BillingDescription
    , BillingAmount
    , BillingItemQty
    , BillingItemDate
)
SELECT
    24
    , 1
    , 'Room'
    ,  CASE 
        WHEN CAST(GETDATE() AS TIME) <= '12:00' THEN QuotedRate * Nights 
        WHEN CAST(GETDATE() AS TIME) >= '13:00' THEN (QuotedRate * Nights) + (QuotedRate * Nights * .50) 
        ELSE (QuotedRate * Nights) + (QuotedRate * Nights * .50) 
      END
    , 1
    , GETDATE()
FROM Folio
WHERE FolioID = 24

SQL Fiddle已关闭，因此我创建了表并在本地运行SQL。见下文。

以下是各个SQL脚本。您可能想为IDENTITY列等修改它。

CREATE TABLE Billing (
    FolioID INT NOT NULL,
    BillingCategoryID INT NULL,
    BillingDescription VARCHAR(100) NOT NULL,
    BillingAmount DECIMAL(9,2) NULL,
    BillingItemQty NUMERIC(5,0) NULL,
    BillingItemDate DATETIME NULL
)

CREATE TABLE Folio
(
  FolioID INT NOT NULL,
  QuotedRate DECIMAL(6,2) NOT NULL,
  Nights INT NOT NULL
)

INSERT INTO Folio(FolioID, QuotedRate, Nights)
VALUES (24, 100.00, 5)

INSERT INTO Billing (
    FolioID 
    , BillingCategoryID
    , BillingDescription
    , BillingAmount
    , BillingItemQty
    , BillingItemDate
)
SELECT
    24
    , 1
    , 'Room'
    ,  CASE 
        WHEN CAST(GETDATE() AS TIME) <= '12:00' THEN QuotedRate * Nights 
        WHEN CAST(GETDATE() AS TIME) >= '13:00' THEN (QuotedRate * Nights) + (QuotedRate * Nights * .50) 
        ELSE (QuotedRate * Nights) + (QuotedRate * Nights * .50) 
      END
    , 1
    , GETDATE()
FROM Folio
WHERE FolioID = 24

SELECT * FROM Billing

我使用了FolioID = 24，因为这就是我在INSERT语句中看到的值。但是这种方法可以用于任何FolioID

以下条件将根据一天中的时间为您提供正确的计算。您还应该有一个默认子句“以防万一”，这是下面的ELSE部分。

SELECT 'Total Lodging' =
  CASE 
    WHEN CAST(GETDATE() AS TIME) <= '12:00' THEN QuotedRate * Nights 
    WHEN CAST(GETDATE() AS TIME) >= '13:00' THEN (QuotedRate * Nights) + ((QuotedRate * Nights) * .50) 
    ELSE (QuotedRate * Nights) + ((QuotedRate * Nights) * .50) -- Default rate
  END
FROM Folio

我在SQL Server中使用了条件，没有从表中选择SELECT以确保我的CASE语句有效，见下文。

Answer 2

INSERT INTO Billing (FolioID, BillingCategoryID, BillingDescription, BillingAmount, BillingItemQty, BillingItemDate)
VALUES(
    24
   , 1
   , 'Room'
   , CASE WHEN (CAST(GETDATE() as time) < '12:00 PM')  then 
        (
            SELECT QuotedRate * Nights AS "TotalLodging" FROM Folio
        ) 
    ELSE
        ( 
            SELECT (QuotedRate * Nights) + ((QuotedRate * Nights) * .50) AS "TotalLodging"
            FROM Folio
        )
    End
   , 1
   , GETDATE()
)

在INSERT INTO语句中使用IF语句

2 个答案: