foreign key constraint 中文意思是什麼

foreign key constraint 解釋
外鍵約束
  • foreign : adj 1 外國的；外交的。2 外國來[產]的；外省的，外地的；〈美國〉他州的，本州管轄外的。3 別家工廠[公...
  • key : n 1 鑰匙。2 要害，關口，要沖。3 關鍵，線索，秘訣；解法。4 （外國書的）直譯本，圖例，題解，圖解，...
  • 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. To disable a foreign key constraint for replication

    在復制時禁用foreign key約束
  2. A foreign - key constraint, which can be used to maintain referential integrity between a parent and child table in a dataset

    外鍵約束，可用來維護數據集中的父表和子表之間的引用完整性。
  3. Disabling a foreign key constraint enables data in the table to be modified without being validated by the constraints

    禁用foreign key約束將使表中的數據不經約束驗證便可修改。
  4. A foreign key is a constraint that enforces referential integrity

    外鍵是強制引用完整性的約束。
  5. Object allows you to define foreign - key constraint rules

    對象還允許定義外鍵約束規則。
  6. Foreign - key constraint rule

    外鍵約束規則
  7. As part of the foreign - key constraint, you can specify referential integrity rules that are applied at three points

    作為外鍵約束的一部分，可以指定在三個時候應用的引用完整性規則：
  8. The constraint enforces referential integrity by guaranteeing that changes cannot be made to data in the primary key table if those changes invalidate the link to data in the foreign key table

    如果主鍵表中數據的更改使之與外鍵表中數據的鏈接失效，則這種更改將無法實現，從而確保了引用完整性。
  9. Although the main purpose of a foreign key constraint is to control the data that can be stored in the foreign key table, it also controls changes to data in the primary key table

    盡管foreign key約束的主要目的是控制可以存儲在外鍵表中的數據，但它還可以控制對主鍵表中數據的更改。例如，如果在sales . salesperson
  10. Allows you to place a foreign key constraint on one or more columns in a dataset table that is related to another table

    允許您將外鍵約束放置在與另一個表相關的數據集表的一個或多個列上。
  11. A parent row cannot be deleted if it has any child rows. you can create a foreign key constraint between single columns or between an array of columns by using the

    例如，如果foreignkeyconstraint的deleterule屬性是none ，那麼在父行有子行的情況下，則無法刪除父行。
  12. A foreign key constraint can reference columns in tables in the same database or within the same table

    Foreign key約束可以引用同一數據庫的表中的列或同一表中的列。
  13. For this constraint to execute, the foreign key columns must be nullable

    若要執行此約束，外鍵列必須可為空值。
  14. For this constraint to execute, all foreign key columns must have default definitions

    若要執行此約束，所有外鍵列都必須有默認定義。
  15. To create a foreign key constraint on an existing table

    在現有表中創建foreign key約束
  16. The foreign key constraint is applied when you save the table

    當保存該表時應用外鍵約束。
  17. Or foreign key constraint dialog box is displayed

    即顯示「唯一約束」或「外鍵約束」對話框。
  18. Table. a foreign key constraint prevents this situation

    Foreign key約束防止這種情況的發生。
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