A superkey wani sifa ne da za a iya amfani dasu don gano bayanan bayanan bayanai
Aiki shine ko dai ɗaya ko haɗin halayen da za a iya amfani dasu don gane bayanan bayanan bayanai. Tebur zai iya samun haɗuwa da yawa waɗanda suka haifar da birai.
Example Example
Tebur tare da filayen
Sunan | Shekaru | SSN | Waya Ext. |
---|---|---|---|
Robert Jones | 43 | 123-45-6789 | 123 |
Beth Smith | 43 | 234-56-7890 | 456 |
Robert Jones | 18 | 345-67-8901 | 789 |
Kamar yadda kake gani, ginshiƙan
Nau'in Superkeys
Daga waɗannan da aka jera a teburin a sama, kawai
Ana iya kira Idan tebur ba ta ƙunshe da sashen Sabuwar lambobin ma'aikata za a kira su maɓallin farko na haɓaka. Wannan maɓallin maɓallin ƙananan maɓallin zai zama maƙarƙashiya.