check constraint 中文意思是什麼

check constraint 解釋
檢查條件約束
  • check : n 1 （象棋）將軍（ ），被將軍的局面。2 （突然的）妨礙[制止，阻止]；停頓，挫折；【打獵】（獵狗聞不...
  • constraint : n. 1. 強迫，拘束。2. 約束，壓抑，拘泥。3. 強制力。4. 緊張感[狀態]。
  1. You can create a simple constraint expression to check data for a simple condition ; or you can create a complex expression, using boolean operators, to check data for several conditions

    可創建簡單的約束表達式，用簡單條件檢查數據或者使用布爾運算符創建復雜表達式，用若干個條件檢查數據。
  2. Is a logical expression used in a check constraint and returns true or false

    用於check約束的邏輯表達式，返回true或false 。與check約束一起使用的
  3. Text of search condition for a check constraint

    檢查約束的搜索條件的文本。
  4. If the table was nonempty before the bulk import operation, the cost of revalidating the constraint may exceed the cost of applying check constraints to the incremental data

    如果在大容量導入操作之前表為非空狀態，則重新驗證約束的開銷可能超過將check約束應用於增量數據的開銷。
  5. An algorithm to resolve the coupling effect problem is proposed during the cross point assignment ( cpa ) stage. in the algorithm, the priority queue concept and the rip - up and reroute strategy are combined to control crosstalk noise caused by interconnect coupling capacitance. first, the nets are arranged into different priority queues according to their weighted sum of their length and criticality. then, the cpa problem for one queue of nets is translated into a linear assignment problem. after the assignment of one queue of nets, a post - cpa checking routine is performed to check and rip up the net pairs which violate the crosstalk noise constraint and then push them into the next queue to be reassigned. the algorithm is tested by a set of bench mark examples, and the experimental results are promising

    提出了一種在過點分配階段解決噪聲耦合效應問題的演算法.該演算法採用優先隊列同拆線重布策略相結合的方法，控制由互連線耦合電容引起的串擾噪聲.演算法中，首先按照線長和約束限制，將線網劃分到若干個優先隊列中.然後，將每個優先隊列的過點分配問題轉換為線性分配問題.在完成一個線網隊列的分配后，通過過點分配后處理過程檢查串擾約束滿足情況，對違反約束的線網對進行拆除，放入后續線網隊列進行重新分配.實驗數據表明，該演算法能夠取得好的效果
  6. Abstract : an algorithm to resolve the coupling effect problem is proposed during the cross point assignment ( cpa ) stage. in the algorithm, the priority queue concept and the rip - up and reroute strategy are combined to control crosstalk noise caused by interconnect coupling capacitance. first, the nets are arranged into different priority queues according to their weighted sum of their length and criticality. then, the cpa problem for one queue of nets is translated into a linear assignment problem. after the assignment of one queue of nets, a post - cpa checking routine is performed to check and rip up the net pairs which violate the crosstalk noise constraint and then push them into the next queue to be reassigned. the algorithm is tested by a set of bench mark examples, and the experimental results are promising

    文摘:提出了一種在過點分配階段解決噪聲耦合效應問題的演算法.該演算法採用優先隊列同拆線重布策略相結合的方法，控制由互連線耦合電容引起的串擾噪聲.演算法中，首先按照線長和約束限制，將線網劃分到若干個優先隊列中.然後，將每個優先隊列的過點分配問題轉換為線性分配問題.在完成一個線網隊列的分配后，通過過點分配后處理過程檢查串擾約束滿足情況，對違反約束的線網對進行拆除，放入后續線網隊列進行重新分配.實驗數據表明，該演算法能夠取得好的效果
  7. 3. clear the tasks will always honor their constraint dates check box

    3 .清除「任務要服從限制日期」復選框。
  8. To test the constraint on data that existed before you created the constraint, check check existing data on creation or enabling

    若要在創建約束前對現有數據測試約束，請選中「在創建或啟用時檢查現有數據」 。
  9. Create a constraint expression to check data for a condition

    創建根據條件檢查數據的約束表達式
  10. Creating a constraint expression to check data for a condition

    創建constraint表達式以檢查數據是否符合條件
  11. Because check constraints can reference only the columns on which the column - level or table - level constraint is defined, any cross - table constraints in this case, business rules must be defined as triggers

    由於check約束只能引用定義了列級或表級約束的列，表間的任何約束（在本例中是業務規則）都必須定義為觸發器。
  12. To check existing data when creating a check constraint

    創建check約束時檢查現有數據
  13. Check constraint reenables the constraint

    將重新啟用該約束。
  14. E. adding an unverified check constraint to an existing column

    E .在現有列中添加一個未經驗證的check約束
  15. Next, the constraint check algorithm on the safety mechanism of the parallel robot is studied

    其次，對並聯機器人安全機構的約束檢驗演算法進行了研究。
  16. In the check constraints dialog box select the constraint from the selected check constraint list

    在「 check約束」對話框中，從「選定的check約束」列表中選擇約束。
  17. Type the check constraint expression in the box provided

    在提供的框中鍵入check約束表達式。
  18. If a new constraint is incompatible with previous ones, then the whole system becomes inconsistent. therefore, it is very important to judge the consistency and redundancy of information, hi this chapter, we propose the linear and non - linear programming models to check the consistency and redundancy of information and give an approach to make system transform from inconsistency to consistency by abbreviating the incompatible constraints

    如果一個新的約束條件是冗餘的，那麼，它對改進決策結果起不到任何作用，如果一個新的約束條件與以前的信息不相容，那麼就會造成整個系統不一致，因此，判斷信息的一致性和冗餘性有非常重要的意義。
  19. Used in a check or unique constraint

    用於check或unique約束中的列。
  20. Select the option to disable a check constraint during insert and update transactions if you know that new data will violate the constraint, or if the constraint applies only to the data already in the database

    如果您知道新數據將與約束沖突或者如果約束僅應用於數據庫中已有的數據，則可選擇該選項以在insert和update事務過程中禁用check約束。
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