check constraints check 中文意思是什麼

check constraints check 解釋
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...
  • constraints : 變動極限
  1. The constraints are computable, but the resources required to check them are beyond the access of the program

    限定元素可以計算，但是程序無法訪問檢查它們所需要的資源。
  2. Then, the mathematical models for workshop layout of general production line and automobile assembly - welding line are given, the topology model of multiple constraints expression and workshop layout is presented in depth, and then principles on position check and constraints check are also presented. a modified genetic algorithm is also proposed based on traditional generic algorithm

    在此基礎上，以物流優化和空間利用率最大化為目標，建立了車間設備布局的一般數學模型和汽車裝焊車間設備布局的數學模型;深入探討了多種約束表達和車間布局的拓撲模型，提出了約束檢驗的方法和位置判定的原則。
  3. Check constraints provide the same functionality and are preferred because they are in the sql - 92 standard

    其他文件組永久保持離線狀態，盡管可以在以後還原它們。
  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. Based on the timing constraints event model of rtl ( real time logic ), the compiling algorithms for timing constraints event transform the problem of how to detect timing constraints event to the problem of how to find negative cycle in weighted directed graph, which is named as constraints graph. by simplifying constraints graph, the efficient detecting algorithms for timing constraints event have been developed, which not only has good time complexity but also can find events that violate timing constraints as early as possible. in order to verify the event detecting methods based on dynamic rules and to check its efficiency in application, experiment schemes are designed and performed on the implemented prototype system in linux environment

    帶時間約束事件的編譯演算法以rtl （ realtimelogic ）事件模型為基礎，將帶時間約束事件的檢測轉化為在帶權值的有向圖（此即受限圖）中尋找負圈的問題，它通過化簡受限圖得到最小有效約束集；運行時事件檢測演算法在最小有效約束集上檢查事件的時間約束，不但有較好的執行效率，而且能盡早地發現違反時間約束的事件。
  6. It ' s also a good idea to check the necessity of your constraints occasionally

    適時地檢查限制的必要性，不失為一個好辦法。
  7. Check constraints that directly or indirectly reference methods in the assembly

    直接或間接引用程序集中方法的check約束。
  8. 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。
  9. You can enforce domain integrity to restrict the type by using data types, restrict the format by using check constraints and rules, or restrict the range of possible values by using foreign key constraints, check constraints, default definitions, not null definitions, and rules

    您可以強制域完整性限制類型（通過使用數據類型） 、限制格式（通過使用check約束和規則）或限制可能值的范圍（通過使用foreign key約束、 check約束、 default定義、 not null定義和規則） 。
  10. Using input mask vs. check constraints

    使用輸入掩碼與使用check約束
  11. The parser must understand the validity constraints of the xml specification and check the document for possible violations

    分析器必須了解xml規范的有效性約束，並檢查文檔中是否存在違反約束的情況。
  12. 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。
  13. You can define many check constraints for a table

    可以為表定義多個check約束。
  14. How to : disable check constraints for replication

    >如何：對復制禁用check約束
  15. Check constraints visual database tools

    > check約束（可視化數據庫工具）
  16. Primary key, foreign key, unique, and check constraints

    主鍵、外鍵、惟一性約束和檢查約束
  17. 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。
  18. Unique, primary key, referential, check, and functional dependency constraints are supported

    惟一約束、主鍵約束、參照約束、檢查約束和函數依賴約束在這里都受支持。
  19. Triggers, unlike referential and check constraints, can even be used to update other tables

    觸發器並不像參照完整性約束和檢查約束那樣，我們甚至可以使用對其他表來進行更新。
  20. Unlike check constraints, triggers can reference columns in other tables

    與check約束不同的是，觸發器可以引用其他表中的列。
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