Given
4 2 5 2 7 9 10 1 2
Sort the matrix rowwise using the second column as key so that the result is
10 1 2 4 2 5 2 7 9
In Matlab, the sortrows() command is used, but now we tell it to use the second column as key.
In Mathematica the SortBy[] command is now used but we tell it to use the second slot as key.
Mathematica mat={{4, 2, 5}, {2, 7, 9}, {10,1, 2}}; (*sort by second element as key*) SortBy[mat,#[[2]]&]

{{10, 1, 2}, {4, 2, 5}, {2, 7, 9}} 
Maple restart; A:=Matrix([[4,2,5], [2,7,9], [10,1,2]]); convert(A,listlist); sort(%,key=(x>x[2])); Matrix(%)

Matrix(3, 3, [[10, 1, 2], [4, 2, 5], [2, 7, 9]]) 
In Maple 2023 we can now do the following to get the same output
restart; A:=Matrix([[4,2,5], [2,7,9], [10,1,2]]); ArrayTools:SortBy( A, 'column', 2 );

Matrix(3, 3, [[10, 1, 2], [4, 2, 5], [2, 7, 9]]) 