primary key index 中文意思是什麼

primary key index 解釋
主關鍵字索引
  • primary : adj 1 第一的，最初的，初級的；初等的；基本的；基層的。2 主要的，為首的，第一位的。3 原始的，根本...
  • 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，...
  • index : n （pl es dices ）1 索引。2 指標，標準，標志。3 示[食]指 （＝index finger）。4 指數。5 【印刷】指...
  1. The reason why these other tables are missing is probably because they do not have a primary key index field associated with them : only the

    其他表為什麼沒有出現，可能是因為它們沒有相關聯的主鍵（索引欄位） ：只有
  2. The results indicated that as the intensity of sward cleavage increased, elymus nutans and other plants that had high requirements in soil aeration and resource space presented an increased competitive edge and the species that had low requirements in soil aeration and resource space presented an opposite picture ; low - intensity sward cleavage could help increase species diversity to a certain extent, but the diversity index appeared to decline as a whole as the cleavage intensity increased ; the effects of sward cleavage on functional groups of the vegetations showed in such manner as e. nutans - represented grasses increased in their composition with the intensity of sward cleavage raised, and sedges and forbs decreased in their compositions with the intensity of sward cleavage raised ; sward cleavage showed a significant improving effect on primary productivity of the meadows and was capable of increasing the proportion of quality - grass biomass to the total plant biomass ; sward cleavage could be independently employed as an effective measure to rehabilitate and improve alpine - meadow grasslands and thus played a basic and key role in the technical combination aiming at establishing hay fields characterized by e. nutans

    結果表明：垂穗披堿草等對土壤通透性和資源空間要求較高的物種，競爭力隨劃破強度的增加而上升，而對土壤通透性和資源空間要求相對較低的物種則相反；輕度劃破干擾對提高物種豐富度具有一定的促進作用，但多樣性指數則總體上表現為隨劃破強度的增加而呈下降的趨勢；劃破干擾對植被功能群的影響表現為以垂穗披堿草為代表的禾草類組分隨干擾強度的增加而顯著上升，莎草類和雜類草組分隨干擾強度的增加而顯著下降；劃破干擾對草地初級生產力的提升具有顯著的促進作用，且可顯著增加植物總量中優質牧草的比重；劃破干擾可獨立作為高寒草甸類草地恢復與改良的有效措施，在定向培育垂穗披堿草型割草場的技術組合中具有核心和基礎性的地位。
  3. If the index enforces a primary key or unique constraint and the index definition is not altered in any way, the index is dropped and re - created preserving the existing constraint

    如果索引強制primary key或unique約束，且索引定義沒有任何改變，則會刪除並重新創建該索引並保留現有約束。
  4. As the only index option that applies to primary key or unique constraints is maintained for backward compatibility, but will not be documented in this manner in future releases

    記錄為適用於primary key或unique約束的唯一索引選項是為了保持向後兼容，但在未來的版本中將不會以此方式進行記錄。
  5. When primary is specified, a clustered index is created with the clustered key formed from the clustering key of the user table and an xml node identifier

    指定primary時，會使用由用戶表的聚集鍵形成的聚集鍵和xml節點標識符來創建聚集索引。
  6. However, by the time we started collecting index statistics, for example, for the primary key defined on the integer column, there were 10, 000 additional records inserted, hence, the number of rows in the table is 1, 110, 000, and hence the primary index firstkeycard would be 1, 110, 000

    但是，在我們開始收集索引統計數據時，例如，對于整型列上所定義的主鍵，就插入了10 ， 000條附加記錄，因此，該表中的行數是1 ， 110 ， 000 ，而主索引firstkeycard將是1 ， 110 ， 000 。
  7. For example, you may want the primary key constraint of the table to reference other columns, or you may want to change the column order, index name, clustered option, or fill factor of the primary key constraint

    例如，可以讓表的primary key約束引用其他列，更改列的順序、索引名、聚集選項或primary key約束的填充因子。
  8. The primary key of a table is automatically indexed. in full - text search, a full - text index stores information about significant words and their location within a given column

    在數據庫之間復制和分發數據和數據庫對象，然後在數據庫之間進行同步以保持一致性的一組技術。
  9. This index also permits fast access to data when the primary key is used in queries

    當在查詢中使用主鍵時，此索引還可用來對數據進行快速訪問。
  10. The following example disables a primary key constraint by disabling the primary key index

    以下示例通過禁用primary key索引來禁用primary key約束。
  11. Method. in ado. net, rows are represented as collections, so you can loop through a table as you would through any collection, or access particular rows via ordinal or primary key index

    在ado . net中，行表示為集合，因此您可以像依次通過任何集合那樣依次通過表，或通過序號索引或主鍵索引訪問特定行。
  12. Control to index into the array of data keys, and then return the primary key of the selected row

    控制項）對數據鍵的數組進行索引，然後返回選定行的主鍵。
  13. Primary key constraint with a clustered index

    具有聚集索引的primary key約束。
  14. Primary key constraint with a nonclustered index

    具有非聚集索引的primary key約束。
  15. Primary key or unique constraint with a nonclustered index

    非聚集索引的primary key或unique約束。
  16. Dialog box, select the unique key in the selected primary unique key and index list

    在「索引/鍵」對話框中，從「選定的主鍵/唯一鍵和索引」列表中選擇唯一鍵。
  17. The property index is built on columns pk, path and node value of the primary xml index where pk is the primary key of the base table

    Property索引是對主xml索引的列（ pk 、 path和節點值）創建的，其中pk是基表的主鍵。
  18. Column id of the last column to be included in index - organized table primary key non - overflow index

    要加入通過索引組織的表的主鍵（非溢出）索引中的最後一列的列id 。
  19. A clustered index must exist on the primary key of the user table

    聚集索引必須存在於用戶表的主鍵上。
  20. If the nonclustered index is on the primary key, any active, referencing foreign key constraints will automatically be disabled

    如果非聚集索引在主鍵上，將自動禁用引用foreign key的任何活動約束。
分享友人
分享到 Line

分享到臉書