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english:glossary:field

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english:glossary:field [//19/04/2015 17:56//] – créée taienenglish:glossary:field [//26/08/2018 12:43//] (Version actuelle) – joliveau
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 A column of an attribute table also called a field. A field contains information that are all attributes of the geographical entity considered present in the layer. A field is defined by the type of information it contains: text, whole digital, real-numeric, date ... and its length. It is essential to consider the type and length fields of a table from the conception of the database. A text field will accept any alphanumeric character, while a numeric field will only accept integers or real depending on the option. A text field can contain numbers, a code example. It will not digitize, however. For example, we are not able to calculate the average values of the field. Similarly, only a numeric field can compute the values added to those of another field, provided that it is numerical as well. Numeric fields can be treated as statistical variables. The length of a field is also important. For a text field, it is the number of characters that will be entered in the field. For a numeric, field length is the number of positions that will accommodate the number (tens, hundreds, thousands and the number of decimal places). A column of an attribute table also called a field. A field contains information that are all attributes of the geographical entity considered present in the layer. A field is defined by the type of information it contains: text, whole digital, real-numeric, date ... and its length. It is essential to consider the type and length fields of a table from the conception of the database. A text field will accept any alphanumeric character, while a numeric field will only accept integers or real depending on the option. A text field can contain numbers, a code example. It will not digitize, however. For example, we are not able to calculate the average values of the field. Similarly, only a numeric field can compute the values added to those of another field, provided that it is numerical as well. Numeric fields can be treated as statistical variables. The length of a field is also important. For a text field, it is the number of characters that will be entered in the field. For a numeric, field length is the number of positions that will accommodate the number (tens, hundreds, thousands and the number of decimal places).
- +\\ See also: [[english:glossary:rdbms|Database Management System (DBMS)]] 
-See also: [[english:glossary:rdbms|Database Management System (DBMS)]]+\\ [[glossaire:champ|[French: Champ]]]
  
english/glossary/field.1429458984.txt.gz · Dernière modification : //19/04/2015 17:56// de taien
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