您要查找的是不是：
- The query determines whether some columns are part of an index key. 該查詢確定某些列是否屬於索引鍵。
- This means no two rows can have the same value for the index key. 這意味著任何兩行都不能有相同的索引鍵值。
- A column is part of a clustered index key that may be null. 列是可能空聚集索引鍵的一部分。
- Up to 16 columns can be combined into a single composite index key. 一個組合索引鍵中最多可組合16列。
- Sum the length of each column that will be defined in the index key. 求索引鍵中將定義的每一列的長度之和。
- These column modification restrictions also apply to index key columns. 這些列修改限制也適用於索引鍵列。
- Each index key must be unique or contain a NULL in at least one column. 每個索引鍵必須是唯一的,或者至少在一列中包含NULL。
- Columns; however, such columns cannot be included in the clustered index key. 列;但聚集索引健中不能包含這類列。
- It reports only include columns for some queries, so index key columns must be manually selected. 它針對某些查詢只報告包含列,因此必須手動選擇索引鍵列。
- In this case, one of the include columns must be selected for the index key column. 在這種情況下,必須為索引鍵列選擇包含列之一。
- Neither column of the output result set is a key, but together they form an index key. 輸出結果集中的任一列都不是一個鍵,但是它們結合在一起將形成一個索引鍵。
- For indexes, the insertion point of a new row is set by the index key. 對於索引,新行的插入點由索引鍵設置。
- The UNLOAD TABLE statement allows you to unload a table in the order of the index key. UNLOAD TABLE語句可用於按照索引鍵的順序卸載表。
- This value is part of the index key and is required to make sure that every row has a unique key value. 此值是索引鍵的一部分,用於確保每一行都具有唯一的鍵值。
- The LOAD TABLE statement inserts rows into the table in the order of the index key. LOAD TABLE語句可用於按照索引鍵的順序在表中插入行。
- VSAM arranges records by an index key, relative record number, or relative byte addressing. VSAM通過一個索引鍵值,相關記錄號或者相關位元組地址來組織記錄。
- Smaller index keys take less space and are more effective that larger keys. 與較大的鍵相比,較小的索引鍵佔用的空間更小,並且更為有效。
- SQL Server navigates down the index to find the row corresponding to a clustered index key. 第二個參數，如果是''，表示影響該表的所有索引。
- The clustered index is implemented as a B-tree index structure that supports fast retrieval of the rows, based on their clustered index key values. 聚集索引按B樹索引結構實現,B樹索引結構支持基於聚集索引鍵值對行進行快速檢索。
- An imprecise expression that forms the value of an index key column must reference a stored column in a base table underlying the view. 構成索引鍵列值的不精確表達式必須引用視圖下基表中的存儲列。
