Question

I want to get/select a particular element in a row. How can i do that for Oracle 11g, sql server and mysql ?

eg. id - name - address
    1  - abc  - def
    2  - adl  - eio
    3  - yuc  - pwr

Select/display adl, ie 2nd row name column.

Answer 1

with a particular element do you mean a field ?

in all of them, is the same way: Standard ANSI SQL. For example:

select TheFieldYouWant from YourTable where RowIdYouWant = 1

This will get from the table the row with Id = 1
and then, show you the field you want. You could put more fields, if you want to show more, or * to show all of them