Define the Primary key and its Importance.

The key or field that is used to uniquely identify records from the database table is called the primary key. It must be unique and cannot be kept empty(null). The importance of the primary key are :
  • It uniquely identifies records.
  • It helps in faster access to data.
  • It helps to prevent duplication of data.
  • It avoids empty(null) values.
  • It is used to establish table relationships.
Discussion
0 Comments
  Loading . . .

    https://topjournals.uz/

    situs toto

    toto 4d

    toto slot

    TOTO 4D

    https://concept.pdmdental.com/

    https://pafipulaukelor.org/

    https://himpsikotamedan.org/

    https://rsmurniteguh.org/

    https://columbiaasia.org/

    https://www.pdmdental.com/

    https://mtsn1karanganyar.sch.id/

    TOTO 4D

    Slot777

    Slot Demo

    slot gacor

    SITUS TOTO

    toto 4d

    https://sciencebring.com/

    situs toto

    Nana4D

    Situs Resmi Slot88 Server Thailand

    slot88

    slot gacor

    slot88

    Slot777

    TOTO 4D

    toto 4d

    situs toto

    toto 4d

    slot88

    situs toto

    https://ijmsdh.in/

    https://issj.in/

    https://universalpublicationhouse.com

    https://visionpublisher.info/

    https://eijmr.org/

    https://aimjournals.in/

    slot88

    situs toto

    https://mydentistwor.com/

    toto 4d