已知有定义StringBuffer S = “ABCDEFGH”;,则从S中删除字符C、D、E、F,对应语句应为( )。 A: S.delete(C,F); B: S.delete(2,6); C: S.delete(2,5); D: S.delete(1,5);
已知有定义StringBuffer S = “ABCDEFGH”;,则从S中删除字符C、D、E、F,对应语句应为( )。 A: S.delete(C,F); B: S.delete(2,6); C: S.delete(2,5); D: S.delete(1,5);
已知:s="a_ba_bc",下面( )选项可以实现将s字符串中的“_ ”去掉,变为"ababc" A: s.replace("_","") B: s.delete("_ ") C: s[0]+s[2:-1] D: s.find("_ ")
已知:s="a_ba_bc",下面( )选项可以实现将s字符串中的“_ ”去掉,变为"ababc" A: s.replace("_","") B: s.delete("_ ") C: s[0]+s[2:-1] D: s.find("_ ")
若要删除数据库S,可用()。 A: DELETE DATABASE S B: DELETE S C: DROP S D: DROP DATABASES
若要删除数据库S,可用()。 A: DELETE DATABASE S B: DELETE S C: DROP S D: DROP DATABASES
若要删除数据库中已经存在的表S,可用( )。 A: DELETE TABLE S B: DELETE S C: DROP TABLE S D: DROP S
若要删除数据库中已经存在的表S,可用( )。 A: DELETE TABLE S B: DELETE S C: DROP TABLE S D: DROP S
若要删除数据库中已经存在的表s,可以使用( )。 A: DELETE TABLE s; B: DELETE s; C: DROP s; D: DROP TABLE s;
若要删除数据库中已经存在的表s,可以使用( )。 A: DELETE TABLE s; B: DELETE s; C: DROP s; D: DROP TABLE s;
若要撤销数据库中已经存在的表S,可用_________。 A: DROP TABLE B: DELETE TABLE S C: DELETE S D: DROP S
若要撤销数据库中已经存在的表S,可用_________。 A: DROP TABLE B: DELETE TABLE S C: DELETE S D: DROP S
使用SQL语句将学生表S中年龄(AGE)大于30岁的记录删除,正确的命令是() A: DELETE FOR AGE>30 B: DELETE FROM S WHERE AGE>30 C: DELETE S FOR AGE>30 D: DELETE S WHERE AGE>30
使用SQL语句将学生表S中年龄(AGE)大于30岁的记录删除,正确的命令是() A: DELETE FOR AGE>30 B: DELETE FROM S WHERE AGE>30 C: DELETE S FOR AGE>30 D: DELETE S WHERE AGE>30
使用SOL语句将学生表S中年龄(AGE)大于30岁的记录删除,正确的命令是()。 A: DELETE FOR AGE>30 B: DELETE FROM S WHERE AGE>30 C: DELETE S FOR AGE>30 D: DELETE S WHERE AGE > 3
使用SOL语句将学生表S中年龄(AGE)大于30岁的记录删除,正确的命令是()。 A: DELETE FOR AGE>30 B: DELETE FROM S WHERE AGE>30 C: DELETE S FOR AGE>30 D: DELETE S WHERE AGE > 3
若要删除数据库中已经存在的表S,可用_________语句。 A: DELETE TABLE S B: DELETE FROM S C: DROP TABLE S D: DROP FROM S
若要删除数据库中已经存在的表S,可用_________语句。 A: DELETE TABLE S B: DELETE FROM S C: DROP TABLE S D: DROP FROM S
若要撤销数据库中已经存在的表S,可用()。 A: DELETE<br/>TABLE S B: DELETE<br/>S C: DROP<br/>TABLE S D: DROP<br/>S
若要撤销数据库中已经存在的表S,可用()。 A: DELETE<br/>TABLE S B: DELETE<br/>S C: DROP<br/>TABLE S D: DROP<br/>S