Firebird 2.1 Language Reference Update
Firebird 2.1 Language Reference Update
Firebird 2.1 Language Reference Update
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Changed in: <strong>2.1</strong><br />
Internal functions<br />
Description: Extracts and returns an element from a DATE, TIME or TIMESTAMP expression. This function was<br />
already added in InterBase 6, but not documented in the <strong>Language</strong> <strong>Reference</strong> at the time.<br />
Result type: SMALLINT or NUMERIC<br />
Syntax:<br />
EXTRACT ( FROM )<br />
::= YEAR | MONTH | WEEK<br />
| DAY | WEEKDAY | YEARDAY<br />
| HOUR | MINUTE | SECOND | MILLISECOND<br />
::= a DATE, TIME or TIMESTAMP expression<br />
The returned datatypes and possible ranges are shown in the table below. If you try to extract a part that isn't<br />
present in the date/time argument (e.g. SECOND from a DATE or YEAR from a TIME), an error occurs.<br />
Table 12.2. Types and ranges of EXTRACT results<br />
Part Type Range Comment<br />
YEAR SMALLINT 1–9999<br />
MONTH SMALLINT 1–12<br />
WEEK SMALLINT 1–53<br />
DAY SMALLINT 1–31<br />
WEEKDAY SMALLINT 0–6 0 = Sunday<br />
YEARDAY SMALLINT 0–365 0 = January 1<br />
HOUR SMALLINT 0–23<br />
MINUTE SMALLINT 0–59<br />
SECOND NUMERIC(9,4) 0.0000–59.9999 includes millisecond as<br />
fraction<br />
MILLISECOND NUMERIC(9,1) 0.0000–999.9 broken in <strong>2.1</strong>, <strong>2.1</strong>.1<br />
MILLISECOND<br />
Added in: <strong>2.1</strong> (with bug)<br />
Fixed in: <strong>2.1</strong>.2<br />
Description: <strong>Firebird</strong> <strong>2.1</strong> and up support extraction of the millisecond from a TIME or TIMESTAMP. The datatype<br />
returned is NUMERIC(9,1).<br />
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