【简答题】Rewrite the following sentences using the comparative adjectives in brackets. Make any changes if necessary. 1 There are more and more cars on the roads so the impact of pollution is increasing. (more...
【单选题】下列关于ALTER TABLE语句,叙述错误的是()
D.
ALTER TABLE语句可以修改字段数据类型
【单选题】The governmental departments concerned are aware that there are downfalls ______ more cars on the roads.
【简答题】以下语句错误的是( ) A. alter table emp delete column addcolumn; B. alter table emp modify column addcolumn char(10); C.alter table emp change addcolumn addcolumn int; D. alter table emp add column addcolumn i...
【单选题】下列关于alter table语句叙述错误的是( )
D.
alter table语句可以修改字段数据类型
【单选题】There ____more cars now in our country.
【简答题】The 1972 Munich s managed to make a big profit mainly by 78(1) services and selling 78(2).
【单选题】下列关于ALTER TABLE 语句叙述错误的是()
C.
ALTER TABLE 语句可以修改字段名称
D.
ALTER TABLE 语句可以修改字段数据类型
【单选题】下列关于ALTER TABLE语句说法不正确的是( )。
D.
ALTER TABLE语句可以修改属性数据类型
【判断题】重点调查的重点单位是根据当前的工作重点来确定的