How to use the data in sql

That is a poor database design: you can do it - it's not at all simple, but you can do it - but it's just not a good use of resources.
Instead, separate your Name1 and age columns into separate columns, given them proper datatypes, so your numeric values are stored in numeric fields, and do it that way:

ID Name1 Age
1  aaa   20
1  bbb   30
1  ccc   40

It will make your life a lot, lot simpler in the long run!

And BTW: you probably don't want to store "Age" as a number: it's a moving value depending on the required date. Instead, you would be better using a DateTime column, and storing the Birthdate instead - that way the Age can be easily worked out and is always correct...