list manipulation - Exporting a table to Excel in CSV format

I am trying to create a table which when exported in a .csv format and opened in MS.Excel has the following form;

i1    j1    f[i1,j1]
i1    j2    f[i1,j2]
i1    j3    f[i1,j3]
i2    j1    f[i2,j1]
i2    j2    f[i2,j2]
i2    j3    f[i2,j3]
i3    j1    f[i3,j1]
i3    j2    f[i3,j2]
i3    j3    f[i3,j3]
...

I have tried;

myTable = Table[{i, j, f[i, j]}, {i, 1, 3}, {j, 1, 3}]
Export["out.csv", myTable]

but it comes out as;

{{{1, 1, f[1, 1]}, {1, 2, f[1, 2]}, {1, 3, f[1, 3]}}, 
 {{2, 1, f[2, 1]}, {2, 2, f[2, 2]}, {2, 3, f[2, 3]}}, 
 {{3, 1, f[3, 1]}, {3, 2, f[3, 2]}, {3, 3, f[3, 3]}}}

Which in MS.Excel looks like;

{i1    j1    f[i1,j1]}    {i1    j2    f[i1,j2]}    {i1    j3    f[i1,j3]}
{i2    j1    f[i2,j1]}    {i2    j2    f[i2,j2]}    {i2    j3    f[i2,j3]}
{i3    j1    f[i3,j1]}    {i3    j2    f[i3,j2]}    {i3    j3    f[i3,j3]}

The 3 sets of nested brackets means it doesn't come out how I wanted it.

I am sure this is a really simple/dumb question but I am a bit lost here.

Answer

I am not sure if you want numbers or functions. Since you are using comma separated variables I have converted your f[i,j] to a string to avoid the comma in the function creating an extra column.

myTable = Table[{i, j, ToString[f[i, j]]}, {i, 1, 3}, {j, 1, 3}]

If you look at the output there is a level of bracketing associated with each table index. You don't want this so we can remove it with flatten

flatTable = Flatten[myTable, 1]

Now use TableForm to check the configuration

TableForm[flatTable]

The output is

Now you can export

Export["out.csv", flatTable]