action query 中文意思是什麼
action query
解釋
操作型查詢-
The simple action query would then use a where clause such as
此簡單操作查詢隨后就會使用where子句（例如 -
Each chronicle action specifies the core query for generating notifications
每項歷史記錄操作均指定了用於生成通知的核心查詢。 -
If you need to wait on a blocking action - say, the results from a remote database query - it is not clear exactly how long you will need to wait for results to be available
如果您需要等待一個阻塞操作比如，對于來自遠程數據庫查詢的結果您不會確切地知道在可以使用結果之前究竟要等待多長時間。 -
Each subscription rule can contain one action, either a basic action, which is a predefined query, or a condition action, which allows subscribers to define the equivalent of a where clause for the notification generation query
每個訂閱規則都可能包含一個操作，該操作可以是基本操作是預定義的查詢，也可以是條件操作允許訂閱方為通知生成查詢定義where子句的等價子句。 -
For example, you might use a performance counter to track the amount of time required to process an order or query a database, or you might monitor the size of a message queue and write code that performs a specific action whenever the queue reaches a preset limit
例如，可以用性能計數器跟蹤處理訂單或查詢數據庫所需的時間量，或者監視消息隊列的大小，並編寫代碼以便在隊列達到預設的限制時執行特定操作。 -
While a predefined action only permits subscribers to specify parameter values for developer - defined queries, a condition action allows a subscriber to create the equivalent of a where clause for the query, using boolean operators and, or, and not to combine individual conditions
預定義操作僅允許訂閱方為開發人員定義的查詢指定參數值，而條件操作則允許訂閱方通過使用布爾運算符（ and 、 or和not ）組合各個條件，為查詢創建等效的where子句。
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