As well as specifying the column name when you
define columns, you can also specify data types.Syntax
<data_type> ::=
CHAR[ACTER] [(<unsigned_integer>)] [ASCII | BYTE | EBCDIC | UNICODE]
| VARCHAR [(<unsigned_integer>)] [ASCII | BYTE | EBCDIC | UNICODE]
| LONG [VARCHAR] [ASCII | BYTE | EBCDIC | UNICODE]
| BOOLEAN
| FIXED (<unsigned_integer> [,<unsigned_integer>])
| FLOAT (<unsigned_integer>)
| INT[EGER] | SMALLINT
| DATE | TIME | TIMESTAMP
Explanation
For the following
character strings, a code attribute can be entered as part of a column definition (column_definition), if required: CHAR[ACTER], VARCHAR, LONG[VARCHAR]In addition to the data types defined above, the following data types are permitted in a column definition and are mapped as follows to the data types below:
Data Type |
Is Mapped To |
BINARY(p) |
FIXED(p) |
DEC[IMAL](p,s) |
FIXED(p,s) |
DEC[IMAL](p) |
FIXED(p) |
DEC[IMAL] |
FIXED(5) |
DOUBLE PRECISION |
FLOAT(38) |
FLOAT |
FLOAT(16) |
FLOAT(39..64) |
FLOAT(38) |
LONG VARCHAR |
LONG |
NUMERIC(p,s) |
FIXED(p,s) |
NUMERIC(p) |
FIXED(p) |
NUMERIC |
FIXED(5) |
REAL(p) |
FLOAT(p) |
REAL |
FLOAT(16) |
SERIAL |
FIXED(10) DEFAULT SERIAL |
SERIAL(p) |
FIXED(10) DEFAULT SERIAL(p) |
See also:
Data type Memory requirements of a column value as a function of the data type