以下创建视图的语句中,正确的是 A: CREATE st_view AS SELECT sid,sname,ssex FROM stu B: CREATE VIEW st_view SELECT sid,sname,ssex FROM stu C: CREATE VIEW st_view AS sid,sname,ssex FROM stu D: CREATE VIEW st_view AS SELECT sid,sname,ssex FROM stu

语句DROP VIEW st_view的作用是 A: 删除视图st_view B: 删除视图st_view中的行 C: 删除视图st_view中的数据 D: 删除视图st_view中的列

创建视图st:create view st ______ selcet * from gzqd

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

f(st): st[]=st={:,:} f(st) (st[],st[]) 结果是

f(st):<p style="padding-left: 50px;"> st[]=st={:,:}f(st)(st[],st[])结果是

def f(st): st.append('x') return st st=['a'] st=f(st) print(st) 结果是

WeregretthatweareunabletoconsideryourrequestforpaymentonD/Aterms.Asarule,weaskforpaymentbyL/C.But,_________________ourfriendlyrelations,wewill,asan A: in view to B: in view with C: in view of D: on view of

列表st定义为: <br/>st A: st$name B: st[[1]] C: st["name"] D: st[["name"]]

通常使用（ ）语句删除视图 A: DROP VIEW B: DELETE VIEW C: ALTER VIEW D: CREATE VIEW