REAL

The REAL data type provides 4 bytes of storage for numbers using IEEE floating-point notation.

Syntax

REAL

Corresponding compile-time Java type

java.lang.Float

JDBC metadata type (java.sql.Types)

REAL

Limitations

REAL value ranges:

These limits are different from the java.lang.Float Java type limits.

An exception is thrown when any double value is calculated or entered that is outside of these value ranges. Arithmetic operations do not round their resulting values to zero. If the values are too small, you will receive an exception. The arithmetic operations take place with double arithmetic in order to detect under flows.

Numeric floating point constants are limited to a length of 30 characters.
-- this example will fail because the constant is too long: 
values 01234567890123456789012345678901e0;

When mixed with other data types in expressions, the resulting data type follows the rules shown in Numeric type promotion in expressions.

See also Storing values of one numeric data type in columns of another numeric data type.

Constants always map to DOUBLE PRECISION; use a CAST to convert a constant to a REAL.

Related concepts
Built-In type overview
Numeric types
Related reference
Data type assignments and comparison, sorting, and ordering
BIGINT
BLOB
CHAR
CHAR FOR BIT DATA
CLOB
DATE
DECIMAL
DOUBLE
DOUBLE PRECISION
FLOAT
INTEGER
LONG VARCHAR
LONG VARCHAR FOR BIT DATA
NUMERIC
SMALLINT
TIME
TIMESTAMP
VARCHAR
VARCHAR FOR BIT DATA
XML data type