Answer:to add a column to existing table.
to rename any existing column.
to change datatype of any column or to modify its size.
to drop a column from the table.
Explanation:
hope this help
Answer:
Name.
Explanation:
The constructor in the class must have the same name as the class.Constructors are used to initialize the object when created.There are basically three types of constructors which are as following:-
- Default Constructor.
- Parameterized Constructor.
- Copy Constructor.
Default Constructor:-This constructor is already present in the class when the class is defined.It does not have any arguments.
Parameterized Constructor:-As the name suggests this constructor have parameters that are used to initialize the object.
Copy Constructor:-This constructor is called whenever an object is copying the values of other object.For example:-
There is already an object present with name obj1.
class obj2=obj1;
Answer: A or B i done this before but my memorys quite blurry i rekon doing A
Explanation:
Answer:
True is the correct answer to the given question .
Explanation:
In the longitudinal analysis of designing we are collecting the information from the similar sample frequently over an enlarged time where as in the cross-sectional analysis designing Gathering the information from the population at the given time interval .
The main objective longitudinal designed is used to monitor the variations in the similar sample as a result of frequent analysis of the similar variables that are not possible in the cross-sectional design analysis .
Therefore the given statement is true .
