fastest way to generate permutations of a table with n columns and put in a new table added one more question to same how to remove duplicate rows

As i am from mathematics background and require to do some huge permutations to start in my work kind help.

If i have a table by name sample1 with n columns what is fastest way to get all the permutations of the rows of sample1 into a new table. n>=12 say.

Please provide kind help with a link where i can get help or any code or query.

An example

say the 6 columns of a row contain

E1       E2      E3        E4        E5        E6

'[0,1]' '[1,2]'  '[2,3]'   '[3.4]'   '[4,5]'   '[9,10]' 

I need to include its permutations

like

E1       E2      E3        E4        E5        E6

'[1,2]' '[0,1]'   '[2,3]'   '[3.4]'   '[4,5]'  '[9,10]'

 '[0,1]'   '[2,3]' '[3.4]' '[4,5]'  '[9,10]' '[1,2]'

and other permutations of row 1 above if there are n columns there will be n! permutations i need them also to be generated quickly and put into a new table.
U can the headers as column name each is a varchar.

Like for the above table if there are two rows with same elements in each of its columns how to remove duplicates kind help with any query