Arrow keys - select next / prior row

Home key - select first row

End key - select last row

Shift + arrow keys - select a range of rows, one at a time

Ctrl + shift + home - select a block of rows

Ctrl + shift + end - select a block of rows

Shift + click - select a block of rows

Ctrl + click - select multiple rows, not necessarily a block

Ctrl + a - select all rows