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  • Writer's pictureRosario Riley

Data Types in SQL with Examples

SQL (Structured Query Language) is everywhere, and in today’s digitalized world with massive amounts of data being gathered every day and stored into a database, knowing how to program with SQL is imperative. Whether you’re a marketer or an aspiring developer, SQL is a great language to learn.



String Data Type

CHAR - Char type is used to store a fixed length string that can contain alphanumeric include numbers, letters, and special characters etc.

VARCHAR – Varchar type is used to store only string variable with fixed length alphanumeric characters that can contain numbers, letters, and special characters.

BINARY - Binary type is equal to CHAR type but stores only binary byte data strings.

TEXT - Text type is store a string that can contain a maximum length of 255 characters.

ENUM - Enum type used only when a string contain only one value, where you have to select from a list of possible values.

BLOB - Blob type is used to store only for BLOBs type data value i.e. (Binary Large Objects).

Numeric Data Type


INT - INT type is used to store integer value.

FLOAT - Float type is used to store a floating point number.

DOUBLE - Float type is used to store a double point number.

DECIMAL - Decimal type is used to store a decimal point number.

BOOL - Bool type used to store only specify Boolean number values either true and false.

Date and Time Data Type

DATE - Date type is used to store only specify date format type in this format YYYY-MM-DD.

TIMESTAMP - TIMESTAMP type is used to store the timestamp data with the format of hour-minute-seconds.

YEAR - Year type is used to store data in a year format i.e. four-digit format.

SQL contains following topics at TCCI:

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