| 1|{"f1":1, "f2":100, "f3":100000, "f4":'a', "f5":"doris", "f6":"2023-02-26", "f7":"2023-02-26 17:58", "f8":1.01, "f9":3.1415926, "f10":1.1} | |
| 2|{"f1":1, "f2":100, "f3":100000, "f4":'a', "f5":"doris", "f6":"2023-02-26", "f7":null, "f8":null, "f9":null, "f10":1.1} | |
| 3|\N | |
| 4|"f1":1, "f2":100, "f3":100000, "f4":'a', "f5":"doris", "f6":"2023-02-26", "f7":null, "f8":null, "f9":null, "f10":1.1 | |
| 5|{f1:1, f2:100, f3:100000, f4:'a', f5:"doris", f6:"2023-02-26", f7:"2023-02-26 17:58", f8:1.01, f9:3.1415926, f10:1.1 |