Ruby On Rails Data Type
:string - is for small data types such as a title. (Should you choose string or text?)
:text - is for longer pieces of textual data, such as a paragraph of information
:binary - is for storing data such as images, audio, or movies.
:boolean - is for storing true or false values.
:date - store only the date
:datetime - store the date and time into a column.
:time - is for time only
:timestamp - for storing date and time into a column.(What's the difference between datetime and timestamp?)
:decimal - is for decimals (example of how to use decimals).
:float - is for decimals. (What's the difference between decimal and float?)
:integer - is for whole numbers.
:primary_key - unique key that can uniquely identify each row in a table
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