| 功能 | 结果 |
| SELECT DATE; | Date--------16/01/01 |
| SELECT CURRENT_DATE; | Date--------16/01/01 |
| SELECT TIME; | Time--------04:50:29 |
| SELECT CURRENT_TIME; | Time--------04:50:29 |
| SELECT CURRENT_TIMESTAMP; | Current TimeStamp(6)--------------------------------2016-01-01 04:51:06.990000+00:00 |
| SELECT DATABASE; | Database------------------------------TDUSER |
