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3nf.es
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Nombre de dominio - 3nf.es
Título del sitio - 3NF ROTULACIONES – 3NF ROTULACIONES
Ir al sitio web - 3NF ROTULACIONES – 3NF ROTULACIONES
Las palabras principales cuentan en 3nf.es:
menú - 26
alternar - 24
lona - 20
que - 14
3nf - 13
calidad - 11
con - 11
los - 11
desde - 9
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Ubicación GEO del sitio
Ubicación País - The Netherlands
País de registro - United States
Ciudad/Pueblo - Amsterdam
Proveedor - SERVERCENTRAL
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Información para el dominio 3nf.es
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servidores de nombres de dominio:
ns-europe91.banahosting.com ns-europe90.banahosting.com
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☆ 3nf.es. 14400 IN TXT "v=spf1 ip4:75.102.57.226 +a +mx include:relay.mailchannels.net ~all"
☆ 3nf.es. 14400 IN MX 0 3nf.es.
☆ 3nf.es. 14400 IN A 75.102.57.229
☆ 3nf.es. 21600 IN NS ns-europe91.banahosting.com.
☆ 3nf.es. 21600 IN NS ns-europe90.banahosting.com.
☆ 3nf.es. 21600 IN SOA ns-europe90.banahosting.com. support.banahosting.com. 2024070101 86400 7200 1600000 86400
Brief facts about 3nf:
Third normal form is a database schema design approach for relational databases which uses normalizing principles to reduce the duplication of data, avoid data anomalies, ensure referential integrity, and simplify data management. It was defined in 1971 by Edgar F. Codd, an English computer scientist who invented the relational model for database management. A database relation is said to meet third normal form standards if all the attributes are functionally dependent on solely a key, except the case of functional dependency whose right hand side is a prime attribute. Codd defined this as a relation in second normal form where all non-prime attributes depend only on the candidate keys and do not have a transitive dependency on another key. A hypothetical example of a failure to meet third normal form would be a hospital database having a table of patients which included a column for the telephone number of their doctor.
Attribute-value system - An attribute–value system is a basic knowledge representation framework comprising a table with columns designating "attributes" and "rows" designating "objects". Each table cell therefore designates the value of a particular attribute of a particular object.
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