????SQL Server?????????????
???????????? ???????[ 2015/7/8 11:33:37 ] ?????????????
????1???????????PRIMARY KEY??
???????????????????卸???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????胁????????????????????????????????????????械??????????????????????????????????械?????????
????2?????????UNIQE??
??????????????????????胁????????????????????????????械????????????????????????????????????????????卸?????????????????????????????????????????????????????????????????魏???????????????????????????
????3????????
???????????????????谢??????????械?????眉???????????????????????????????????????????????????????????????????????效??????纾�???????age??????危????????????CHECK???????????age????????????围?????0??150???age >=0 AND age<=150????
????????????????????????????
???????????胁????????????
????????屑?????????????????????泄??????????????????????????械?????泄??
????4????????
????????????????????????????????????????????????????????????????NULL????????????屑????????????????????械?????????????胁???????????????????????????
????5????????
??????
???路???
??????????????????
2023/3/23 14:23:39???写?貌??????????
2023/3/22 16:17:39????????????????????些??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???路???????路
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11