Action Element for ChronicleRule (ADF)

Provides a Transact-SQL statement that specifies the action to be taken in an event chronicle rule.

语法

<EventClasses>
    <EventClass>
        ...
        <ChronicleRule>
            ...
            <Action>

Element Characteristics

Characteristic	Description
Data type	string, between 1 and 100,000 characters in length.
Default value	None.
Occurrence	Required once per ChronicleRule element.
Updates	Can be modified, but not added or deleted, when updating the application.

Element Relationships

Relationship	Elements
Parent element	ChronicleRule Element (ADF)
Child elements	None.

备注

The Action element can contain Transact-SQL statements that maintain the event chronicle, or can contain calls to stored procedures that maintain the event chronicle.

示例

This example shows a populated Action element. The Transact-SQL statements insert a row into the chronicle table if the stock information doesn't exist, and update the stock information if a row already exists.

<Action>
-- Insert New Stock Symbols with Prices
INSERT dbo.StockEventsChron (StockSymbol, StockPrice)
SELECT e.StockSymbol, e.StockPrice
    FROM dbo.StockEvents AS e
    WHERE e.StockSymbol
        NOT IN (SELECT StockSymbol FROM dbo.StockEventsChron);
-- Update Existing Stock Symbols with New Prices
UPDATE dbo.StockEventsChron
    SET StockPrice = e.StockPrice
    FROM dbo.StockEvents AS e 
    JOIN dbo.StockEventsChron AS c
        ON e.StockSymbol = c.StockSymbol
        WHERE e.StockPrice &gt; c.StockPrice;
</Action>

This example shows how to call a stored procedure that maintains the event chronicle.

<Action>
EXEC MyStoredProcdure;
</Action>

请参阅

参考

Application Definition File Reference

其他资源

定义事件历史记录规则
为事件类定义历史记录
更新实例和应用程序

帮助和信息

获取 SQL Server 2005 帮助