Manuel Gentile

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What’s a SQL data type?

Each column has its own specific type of data that is going to be stored into. Despite having different data types depending on each RBDMS, there are three categories :

Numeric

Numeric data types can store integer, floating point numbers, decimal, real and boolean numbers (true or false / 1 or 0).

String

String data types can store fixed length string, variable length string or Unicode string.

Date and Time

Date and time can store dates, date and time or only time. Each RDBMS can have different date and time formats.

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