# system.data\_type\_families {#system_tables-data_type_families}Contains information about supported [data types](../../sql-reference/data-types/).Columns:-`name` ([String](../../sql-reference/data-types/string.md)) — Data type name.-`case_insensitive` ([UInt8](../../sql-reference/data-types/int-uint.md)) — Property that shows whether you can use a data type name in a query in case insensitive manner or not. For example, `Date` and `date` are both valid.-`alias_to` ([String](../../sql-reference/data-types/string.md)) — Data type name for which `name` is an alias.**Example**``` sqlSELECT*FROMsystem.data_type_familiesWHEREalias_to='String'`````` text┌─name───────┬─case_insensitive─┬─alias_to─┐│ LONGBLOB │ 1 │ String ││ LONGTEXT │ 1 │ String ││ TINYTEXT │ 1 │ String ││ TEXT │ 1 │ String ││ VARCHAR │ 1 │ String ││ MEDIUMBLOB │ 1 │ String ││ BLOB │ 1 │ String ││ TINYBLOB │ 1 │ String ││ CHAR │ 1 │ String ││ MEDIUMTEXT │ 1 │ String │└────────────┴──────────────────┴──────────┘```**See Also**-[Syntax](../../sql-reference/syntax.md) — Information about supported syntax.