What are the four data types in MySQL?

What are the four data types in MySQL?

MySQL supports a lot number of SQL standard data types in various categories. It uses many different data types that can be broken into the following categories: numeric, date and time, string types, spatial types, and JSON data types.

What are primary column types in MySQL?

Because MySQL works faster with integers, the data type of the primary key column should be the integer e.g., INT, BIGINT ….The primary key follows these rules:

• A primary key must contain unique values.
• A primary key column cannot have NULL values.
• A table can have one an only one primary key.

What are the different types of MySQL?

MySQL Data Types

• BIT.
• BOOLEAN.
• DATE.
• DATETIME.
• DECIMAL.
• ENUM.
• JSON.
• TIME.

What is primary key MySQL?

In MySQL, a primary key is a single field or combination of fields that uniquely defines a record. None of the fields that are part of the primary key can contain a NULL value. A table can have only one primary key.

What are the different types of column types in MySQL?

MySQL supports a number of column types, which may be grouped into three categories: numeric types, date and time types, and string (character) types.

What is maximum display size of column in MySQL?

The column types supported by MySQL are listed next. The following code letters are used in the descriptions: Indicates the maximum display size. The maximum legal display size is 255. Applies to floating-point types and indicates the number of digits following the decimal point. The maximum possible value is 30, but should be no greater than M -2.

What are the data types in MySQL 8.0?

MySQL Data Types (Version 8.0) Each column in a database table is required to have a name and a data type. An SQL developer must decide what type of data that will be stored inside each column when creating a table.

What are the data types of a column?

The data type of a column defines what value the column can hold: integer, character, money, date and time, binary, and so on. Each column in a database table is required to have a name and a data type. An SQL developer must decide what type of data that will be stored inside each column when creating a table.