Question

我尝试使用新代码更改现有视图：

with cte1 as (
SELECT    dbo.T_ActionTicketLog.ID, dbo.T_ActionTicketLog.ActionTicketID, dbo.T_Action.Artist, dbo.T_ActionTickets.ActionDate, dbo.T_ActionSeatsType.SeatType,
         dbo.T_ActionPlaceSeats.Seats, dbo.T_ActionTickets.RowNumber, dbo.T_ActionTickets.SeatNumber, dbo.T_ActionTickets.Price, dbo.T_TicketStatus.Name AS Status,
         dbo.T_Users.UserName, dbo.T_OrderTicket.OrderID, T_Users_1.UserName AS SalerName, dbo.T_Fiscal.DocNum, dbo.T_FiscalType.Name AS DocType,
         dbo.T_ActionTicketLog.TicketOrderID, dbo.T_ActionTicketLog.StatusID, dbo.T_ActionTicketLog.UserID, dbo.T_ActionTicketLog.SalerID, dbo.T_ActionTicketLog.FiscalID,
         dbo.T_ActionTicketLog.BarCode, dbo.T_ActionTicketLog.ReservDate, dbo.T_ActionTicketLog.Created, dbo.T_ActionTicketLog.Comments,
         CASE WHEN StatusID IN (3, 10) THEN 1 ELSE 0 END
         * ROW_NUMBER() OVER (PARTITION BY T_ActionTicketLog.ActionTicketID, T_ActionTicketLog.StatusID ORDER BY T_ActionTicketLog.Created) AS rn
FROM          dbo.T_Users AS T_Users_1 RIGHT OUTER JOIN
         dbo.T_ActionPlaceSeats INNER JOIN
         dbo.T_ActionTicketLog INNER JOIN
         dbo.T_TicketStatus ON dbo.T_ActionTicketLog.StatusID = dbo.T_TicketStatus.ID INNER JOIN
         dbo.T_Action INNER JOIN
         dbo.T_ActionTickets ON dbo.T_Action.ID = dbo.T_ActionTickets.ActionID INNER JOIN
         dbo.T_ActionSeatsSubType ON dbo.T_ActionTickets.ActionSeatsSubTypeID = dbo.T_ActionSeatsSubType.ID ON 
         dbo.T_ActionTicketLog.ActionTicketID = dbo.T_ActionTickets.ID INNER JOIN
         dbo.T_ActionSeatsType ON dbo.T_ActionSeatsSubType.SeatsTypeID = dbo.T_ActionSeatsType.ID ON 
         dbo.T_ActionPlaceSeats.ID = dbo.T_ActionSeatsType.SeatsID LEFT OUTER JOIN
         dbo.T_Users ON dbo.T_ActionTicketLog.UserID = dbo.T_Users.ID ON T_Users_1.ID = dbo.T_ActionTicketLog.SalerID LEFT OUTER JOIN
         dbo.T_FiscalType INNER JOIN
         dbo.T_Fiscal ON dbo.T_FiscalType.ID = dbo.T_Fiscal.FiscalTypeID ON dbo.T_ActionTicketLog.FiscalID = dbo.T_Fiscal.ID LEFT OUTER JOIN
         dbo.T_OrderTicket ON dbo.T_ActionTicketLog.TicketOrderID = dbo.T_OrderTicket.ID
),
cte2 as (
   SELECT ActionTicketID, OrderTicketID, Created, TicketBarCode,
   ROW_NUMBER() OVER (PARTITION BY ActionTicketID ORDER BY Created) AS rn
   FROM T_TicketPrint
)
SELECT cte1.*, oa.TicketBarCode
FROM cte1
OUTER APPLY (
   SELECT * FROM cte2
   WHERE cte1.ActionTicketID = cte2.ActionTicketID AND cte1.TicketOrderID = cte2.OrderTicketID AND cte1.rn = cte2.rn
) oa
order by dbo.func_ConvertToInt(cte1.SeatNumber), cte1.ActionTicketID, cte1.Created

当我尝试保存它时，会出现此错误：＆＃34; ORDER BY子句在视图，内联函数，派生表，子查询和公用表表达式中无效，除非TOP，OFFSET或FOR XML也是。指定＆＃34;

查询有什么问题？

Answer 1

视图中的

ORDER BY子句本身并没有意义。视图中的行不会以相同的方式排序，因为表格中的行没有任何顺序。

因此，您可以完全删除视图中的ORDER BY子句，也可以保留ORDER BY并将TOP (100) PERCENT添加到SELECT子句中。通常，拥有TOP (100) PERCENT和ORDER BY没有意义，因为它只会减慢查询速度。当ORDER BY以某种方式限制行数时，视图中的TOP是有意义的。

我想说清楚。这是一种常见的误解。如果将视图定义为：

CREATE VIEW SomeView
AS
SELECT TOP(100) PERCENT SomeColumn
FROM SomeTable
ORDER BY SomeColumn

然后SELECT来自该视图，而不是ORDER BY：

SELECT SomeColumn
FROM SomeView

然后，由于此SELECT而返回的行的顺序未定义，可以是任何行。有时它可能由SomeColumn订购，有时不订购。这取决于很多事情。只有当您向最终ORDER BY添加SELECT时，您才能获得有保证的订单：

SELECT SomeColumn
FROM SomeView
ORDER BY SomeColumn

Answer 2

是的，您通常在视图或子查询中没有order by。如果您确实需要有序输出，请尝试使用SELECT TOP 100 PERCENT黑客。

将其放入最后的select

.
.
.
SELECT TOP 100 PERCENT cte1.*, oa.TicketBarCode
FROM cte1
OUTER APPLY (
   SELECT * FROM cte2
   WHERE cte1.ActionTicketID = cte2.ActionTicketID AND cte1.TicketOrderID = cte2.OrderTicketID AND cte1.rn = cte2.rn
) oa
order by dbo.func_ConvertToInt(cte1.SeatNumber), cte1.ActionTicketID, cte1.Created

无法保存查看中的查询

2 个答案: