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11mradley Inglés 8 fichas

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  1. 1TablesDEFINITION: A table stores all of the records for a particular category
  2. 2RecordsDEFINITION: A record is all of the data or information about one person or one thing.
  3. 3FeildsDEFINITION: a 'field' is one piece of data or information about a person or thing.
  4. 4Data typesA data type is specific types of data regarding certain information i.e currency, time and text ect.
  5. 5Field LengthField length is the number of characters each field will allow.
  6. 6Primary keya primary key is something that will uniquely identify each record in your database.
  7. 7foreign keyDEFINITION: A foreign key is used to link tables together and create a relationship. It is a field in one table that is linked to the primary key in another table.
  8. 8Referential integrityReferential integrity uses the value of each foreign key to prevent you from deleting related records

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Fichas sobre Sin título, creado por 11mradley el 11/11/2014.
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