We do not know anyone older than 130 years, so Temporary testing table, so there will be only a few rows. mysql> CREATE TABLE Ages(Id SMALLINT, Age TINYINT) ENGINE=Memory We can choose values thatįit our requirements. The integer types differ in their storage. MEDIUMINT and BIGINT are MySQL extensions to the The following is a table of integer types in MySQL: TINYINT, We can have 3, 4, 6 cars, but we cannot have 3.33 cars. Integers are used to count discreteĮntities. Z = Integers are infinite.Ĭomputers can practically work only with a subset of integer values,īecause computers have finite capacity. They are written without aįraction or a decimal component. Integers are a subset of the real numbers. Numeric types can be either integers or floating point numbers. Data types enable MySQL to do validation on the data inserted.įinally, with correct data types for table columns, we allow MySQL to optimise Other developers using our tables will know what data to expect from theĭatabase schema. For example dates are compared differently than They ensure that the data is used in a meaningful way. Data types ensure the correctness of the data provided. MySQL supports these groups of data types:Ĭhoosing the right data types for columns is a part of the initial design Parameters, columns, fields, attributes, and variables, also have declared types. Items that can be referenced by a name, such as SQL In this part of the MySQL tutorial, we cover MySQL data types.Ī data type is a set of representable values.
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