data integrity constraints 中文意思是什麼

data integrity constraints 解釋
完整性約束
  • data : n 1 資料,材料〈此詞系 datum 的復數。但 datum 罕用,一般即以 data 作為集合詞,在口語中往往用單數...
  • integrity : n. 1. 誠實,正直。2. 完全,完整。
  • constraints : 變動極限
  1. Declarative referential integrity constraints can be added to the tables to make sure that interrelated data in different tables remains consistent

    可以向表上添加聲明性引用完整性( dri )約束,以確保不同表中的相關數據保持一致。
  2. 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) 。
  3. Database integrity constraints force you to insert or delete data in a given order

    數據庫完整性約束迫使您以給定的順序插入或者刪除數據。
  4. In the creation of a database, a data model and integrity constraints can create certainty in the structure and content of the data

    在數據庫創建中,數據模型和完整性限制能創建數據結構和內容的確定性。
  5. In order to maximize semantic power of xml specifications, the main ideas on integrity constraints for xml documents and the problems related to them are described and discussed. then we proposel a contrainted xml data model ( cxm ), and make some extensions and standardizations on xml - ql

    首先探討了xml數據的完整性約束及相關問題,在此基礎上提出了一個支持完整性約束的xml數據模型cxm ;然後對目前流行的查詢語言xml - ql做了相應的改進和規范化,使其更適合於xml數據的查詢。
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