Learn in the textbookBasic Units of Data Structure
DefinitionA field (フィールド) is each slot for data that makes up a record, and it corresponds to a vertical column in a table.
ExplanationA single field lines up the same kind of data for every record, so a "Name" field holds only names. Each field is given a name and a data type set in advance, such as number, text, or date.
AnalogyThink of the vertical strip you trace down the "Phone" column of a roster for everyone. Whichever row you look at, that strip holds only phone numbers.
Memory hookField also means a plot of farmland. Just as a field grows only one crop, it is a place that holds only one kind of value.