Description

A packed "exact" fixed-point number. M is the total number of digits (the precision) and D is the number of digits after the decimal point (the scale).

• The decimal point and (for negative numbers) the "-" sign are not counted in M .
• If D is 0 , values have no decimal point or fractional part and on INSERT the value will be rounded to the nearest DECIMAL .
• The maximum number of digits ( M ) for DECIMAL is 65.
• The maximum number of supported decimals ( D ) is 30 before MariadB 10.2.1 and 38 afterwards.
• If D is omitted, the default is 0 . If M is omitted, the default is 10 .

  UNSIGNED , if specified, disallows negative values.

  ZEROFILL , if specified, pads the number with zeros, up to the total number of digits specified by M .

  All basic calculations (+, -, *, /) with DECIMAL columns are done with a precision of 65 digits.

  For more details on the attributes, see Numeric Data Type Overview .

  DEC , NUMERIC and FIXED are synonyms, as well as NUMBER in Oracle mode from MariaDB 10.3 .

  Examples

  CREATE TABLE t1 (d DECIMAL UNSIGNED ZEROFILL);
  INSERT INTO t1 VALUES (1),(2),(3),(4.0),(5.2),(5.7);
  Query OK, 6 rows affected, 2 warnings (0.16 sec)
  Records: 6  Duplicates: 0  Warnings: 2
  Note (Code 1265): Data truncated for column 'd' at row 5
  Note (Code 1265): Data truncated for column 'd' at row 6
  SELECT * FROM t1;
  +------------+
  | d          |
  +------------+
  | 0000000001 |
  | 0000000002 |
  | 0000000003 |
  | 0000000004 |
  | 0000000005 |
  | 0000000006 |
  +------------+
  

  With strict_mode set, the default from MariaDB 10.2.4 :

  INSERT INTO t1 VALUES (-7);
  ERROR 1264 (22003): Out of range value for column 'd' at row 1
  

  With strict_mode unset, the default until MariaDB 10.2.3 :

  INSERT INTO t1 VALUES (-7);
  Query OK, 1 row affected, 1 warning (0.02 sec)
  Warning (Code 1264): Out of range value for column 'd' at row 1
  SELECT * FROM t1;
  +------------+
  | d          |
  +------------+
  | 0000000001 |
  | 0000000002 |
  | 0000000003 |
  | 0000000004 |
  | 0000000005 |
  | 0000000006 |
  | 0000000000 |
  +------------+
  

  See Also

  • Numeric Data Type Overview
  • Oracle mode from MariaDB 10.3
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