：）alter table Students drop constraint no_na alter table Students add constraint sno primary key(S
：）alter table Students drop constraint no_na alter table Students add constraint sno primary key(Sno)...
constraint技術資料
?? 資源總數：25
?? 源代碼：4263
?? 電路圖：4
CONSTRAINT子句是指限制和索引相似，雖然限制也能被用于建立和另一個表的關聯。用ALTERTABLE和CREATETABLE語句中的CONSTRAINT子句來建立或刪除條件.CONSTRAINT子句可分為兩種類型：第一種是在單一字段上創建條件；第二種是在一個以上的字段上創建條件。
?? constraint熱門資料
查看全部25個資源 ?This paper introduces an affine invariant of trapezia, and the explicit constraint equation between
This paper introduces an affine invariant of trapezia, and the explicit constraint equation between the intrinsic matrix of a camera and the similarit...
Mining sequential patterns with constraint (SPADE with constraint)
Mining sequential patterns with constraint (SPADE with constraint)...
Abstract Syntax Notation One (ASN.1): Constraint specification
Abstract Syntax Notation One (ASN.1): Constraint specification...
一次性生成Constraint Delaunay的論文
一次性生成Constraint Delaunay的論文，結構完整，敘述詳細。...
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