使用如下语句创建视图: CREATE VIEW bo_view AS SELECT b.book_id,book_name,qty FROM book b,orders ord WHERE b.book_id=ord.book_id; 则视图bo_view中( )列是可以更新的 A: ook_id B: ook_id,book_name C: qty D: ook_id,book_name,qty
使用如下语句创建视图: CREATE VIEW bo_view AS SELECT b.book_id,book_name,qty FROM book b,orders ord WHERE b.book_id=ord.book_id; 则视图bo_view中( )列是可以更新的 A: ook_id B: ook_id,book_name C: qty D: ook_id,book_name,qty
胳bo的bo怎么写
胳bo的bo怎么写
bollo的“bo“发音与汉语”bo波“的发音相同
bollo的“bo“发音与汉语”bo波“的发音相同
BO是( )
BO是( )
Li Bo
Li Bo
bo(薄)
bo(薄)
通有电流I的无限长直导线有如图三种形状,则P,Q,O各点磁感强度的大小BP,BQ,BO间的关系为 A: BP>BQ>BO B: BQ>BP>BO C: BQ>BO>BP D: BO>BQ>BP
通有电流I的无限长直导线有如图三种形状,则P,Q,O各点磁感强度的大小BP,BQ,BO间的关系为 A: BP>BQ>BO B: BQ>BP>BO C: BQ>BO>BP D: BO>BQ>BP
bollo的“bo“发音与汉语”bo波“的发音相同 A: 正确 B: 错误
bollo的“bo“发音与汉语”bo波“的发音相同 A: 正确 B: 错误
通有电流I的无限长直导线有如图三种形状,则P,Q,O各点磁感强度的大小BP,BQ,BO间的关系为( )[img=214x107]1786a0355e1b18c.png[/img] A: BQ > BO > BP B: BP > BQ > BO C: BQ > BP > BO D: BO > BQ > BP
通有电流I的无限长直导线有如图三种形状,则P,Q,O各点磁感强度的大小BP,BQ,BO间的关系为( )[img=214x107]1786a0355e1b18c.png[/img] A: BQ > BO > BP B: BP > BQ > BO C: BQ > BP > BO D: BO > BQ > BP
Among the six basic views, which one can show the height of an object? () A: Front view, top<br/>view, left side view B: Top view, bottom<br/>view C: Left side view, bottom view, rear view D: Front view, left<br/>side view, right side view, rear view
Among the six basic views, which one can show the height of an object? () A: Front view, top<br/>view, left side view B: Top view, bottom<br/>view C: Left side view, bottom view, rear view D: Front view, left<br/>side view, right side view, rear view