Double precision floating-point number. A DOUBLE column uses 8 bytes to store large or precise approximate values.
A normal-size (double-precision) floating-point number (see FLOAT for a single-precision floating-point number). Allowable values are:
-1.7976931348623157E+308 to -2.2250738585072014E-308
0
2.2250738585072014E-308 to 1.7976931348623157E+308
These are the theoretical limits, based on the IEEE standard. The actual range might be slightly smaller depending on your hardware or operating system.
M is the total number of digits and D is the number of digits following the decimal point. If M and D are omitted, values are stored to the limits allowed by the hardware. A double-precision floating-point number is accurate to approximately 15 decimal places.
UNSIGNED, if specified, disallows negative values.
ZEROFILL, if specified, pads the number with zeros, up to the total number of digits specified by M.
REAL and DOUBLE PRECISION are synonyms, unless the REAL_AS_FLOAT is enabled, in which case REAL is a synonym for rather than DOUBLE.
See for issues when using floating-point numbers.
For more details on the attributes, see .
This page is licensed: GPLv2, originally from
DOUBLE[(M,D)] [SIGNED | UNSIGNED | ZEROFILL]
DOUBLE PRECISION[(M,D)] [SIGNED | UNSIGNED | ZEROFILL]
REAL[(M,D)] [SIGNED | UNSIGNED | ZEROFILL]CREATE TABLE t1 (d DOUBLE(5,0) zerofill);
INSERT INTO t1 VALUES (1),(2),(3),(4);
SELECT * FROM t1;
+-------+
| d |
+-------+
| 00001 |
| 00002 |
| 00003 |
| 00004 |
+-------+