include column names in every INSERT statement 
      Example: INSERT INTO tbl_name (col_A,col_B,col_C) VALUES (1,2,3)
insert multiple rows in every INSERT statement
      Example: INSERT INTO tbl_name VALUES (1,2,3), (4,5,6), (7,8,9)
both of the above
      Example: INSERT INTO tbl_name (col_A,col_B,col_C) VALUES (1,2,3), (4,5,6), (7,8,9)
neither of the above
      Example: INSERT INTO tbl_name VALUES (1,2,3)