Use the column checkboxes to build your query. Header columns sets/unsets all columns
SELECT K1N5, K2C5, K3N5, F8, I1, I2, I4, N5, N8, D04, D08, D14, D15, DT8, TM6, C01, C20, C33, R8, C226, C254, LEN, VARC FROM TACOPC