Collpase table column

column a column b column c column d column e
12345 abcde 22345 cdefg 32345
12345 abcde 22345 cdefg 32345
12345 abcde 22345 cdefg 32345
12345 abcde 22345 cdefg 32345
12345 abcde 22345 cdefg 32345
12345 abcde 22345 cdefg 32345