Karteikarten
Ohne Titel
Karten in diesem Stapel (8)
- 1TablesA table stores all of the records for a particular category
- 2RecordsA record is all of the data or information about one person or one thing.
- 3FieldsA 'field' is one piece of data or information about a person or thing.
- 4Data typesA particular kind of data item. This can vary depending on the format.
- 5Foreign keyA 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.
- 6Field lengthsFields usually have default lengths. Eg. Password lengths.
- 7Referential integrityReferential integrity prevents you from deleting related information.
- 8Primary keyIt is so that everything in the record has something to identify itself.
Informationen
- Beschreibung
- Karteikarten am Ohne Titel, erstellt von BenPenn am 11/11/2014.
- Erstellt von
- BenPenn
- Aufrufe
- 0
- Bewertung