In order to include an attribute Name to the teaches relation which of the following command is used ?
A. Alter table teaches include Name;
B. Alter table teaches add Name;
C. Alter table teaches add Name varchar;
D. Alter table teaches add Name varchar(20);
Answer:A
In order to include an attribute Name to the teaches relation which of the following command is used ?
A. Alter table teaches include Name; B. Alter table teaches add Name; C. Alter table teaches add Name varchar; D. Alter table teaches add Name varchar(20);
Explanation:The form of the alter table command is