- A flag associated with an alternate key that indicates whether or not a null key value is defined for the key. For binary, integer, and packed decimal key data types, the null key value is zero expressed in that data type. For the string key data type, users must specify a byte value from 000(8) through 377(8) including ASCII codes.; 和某個替換關(guān)鍵字相聯(lián)系的標(biāo)志,用于指示是否為該關(guān)鍵字定義了一個空關(guān) 鍵字值。對于二進制數(shù)、整數(shù)和壓縮十進制關(guān)鍵字?jǐn)?shù)據(jù)類型,空關(guān)鍵字值為零,并表示為該 數(shù)據(jù)類型的形式。對于字符串關(guān)鍵字?jǐn)?shù)據(jù)類型,用戶必須指定一個字節(jié)的數(shù)值,從八進制的 000到377,其中包括了ASCII字符的代碼。
"查查詞典"手機版
千萬人都在用的超大詞匯詞典翻譯APP