A table T1 in a relational database has the following rows and columns:
|
Roll no |
Marks |
|
1 |
10 |
|
2 |
20 |
|
3 |
30 |
|
4 |
Null |
The following sequence of SQL statements was successfully executed on table T1.
Update T1 set marks = marks + 5
Select avg(marks) from T1
What is the output of the select statement?
1
18.75
2
20
3
25
4
Null