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Date and Time Functions

CURRENT_DATE

{CURRENT_DATE [()] | CURDATE() | SYSDATE | TODAY}

Returns the current date. When called multiple times within a transaction, this function returns the same value.

Example:

CURRENT_DATE()

CURRENT_TIME

{CURRENT_TIME [ () ] | CURTIME()}

Returns the current time. When called multiple times within a transaction, this function returns the same value.

Example:

CURRENT_TIME()

CURRENT_TIMESTAMP

{CURRENT_TIMESTAMP [([int])] | NOW([int])}

Returns the current timestamp. The precision parameter for nanoseconds precision is optional. This method always returns the same value within a transaction.

Example:

CURRENT_TIMESTAMP()

DATEADD

{DATEADD| TIMESTAMPADD} (unitString, addIntLong, timestamp)

Adds units to a timestamp. The string indicates the unit. Use negative values to subtract units. addIntLong may be a long value when manipulating milliseconds, otherwise its range is restricted to int. The same units as in the EXTRACT function are supported. The DATEADD method returns a timestamp. The TIMESTAMPADD method returns a long.

Example:

DATEADD('MONTH', 1, DATE '2001-01-31')

DATEDIFF

{DATEDIFF | TIMESTAMPDIFF} (unitString, aTimestamp, bTimestamp)

Returns the number of crossed unit boundaries between two timestamps. This method returns a long. The string indicates the unit. The same units as in the EXTRACT function are supported.

Example:

DATEDIFF('YEAR', T1.CREATED, T2.CREATED)

DAYNAME

DAYNAME(date)

Returns the name of the day (in English).

Example:

DAYNAME(CREATED)

DAY_OF_MONTH

DAY_OF_MONTH(date)

Returns the day of the month (1-31).

Example:

DAY_OF_MONTH(CREATED)

DAY_OF_WEEK

DAY_OF_WEEK(date)

Returns the day of the week (1 means Sunday).

Example:

DAY_OF_WEEK(CREATED)

DAY_OF_YEAR

DAY_OF_YEAR(date)

Returns the day of the year (1-366).

Example:

DAY_OF_YEAR(CREATED)

EXTRACT

EXTRACT ({EPOCH | YEAR | YY | QUARTER | MONTH | MM | WEEK | ISO_WEEK
| DAY | DD | DAY_OF_YEAR | DOY | DAY_OF_WEEK | DOW | ISO_DAY_OF_WEEK
| HOUR | HH | MINUTE | MI | SECOND | SS | MILLISECOND | MS
| MICROSECOND | MCS | NANOSECOND | NS}
FROM timestamp)

Returns a specific value from a timestamps. This method returns an int.

Example:

EXTRACT(SECOND FROM CURRENT_TIMESTAMP)

FORMATDATETIME

FORMATDATETIME (timestamp, formatString [,localeString [,timeZoneString]])

Formats a date, time, or timestamp as a string. The most important format characters are: y year, M month, d day, H hour, m minute, s second. For details about the format, see java.text.SimpleDateFormat. This method returns a string.

Example:

FORMATDATETIME(TIMESTAMP '2001-02-03 04:05:06', 'EEE, d MMM yyyy HH:mm:ss z', 'en', 'GMT')

HOUR

HOUR(timestamp)

Returns the hour (0-23) from a timestamp.

Example:

HOUR(CREATED)

MINUTE

MINUTE(timestamp)

Returns the minute (0-59) from a timestamp.

Example:

MINUTE(CREATED)

MONTH

MONTH(timestamp)

Returns the month (1-12) from a timestamp.

Example:

MONTH(CREATED)

MONTHNAME

MONTHNAME(date)

Returns the name of the month (in English).

Example:

MONTHNAME(CREATED)

PARSEDATETIME

PARSEDATETIME(string, formatString [, localeString [, timeZoneString]])

Parses a string and returns a timestamp. The most important format characters are: y year, M month, d day, H hour, m minute, s second. For details about the format, see java.text.SimpleDateFormat.

Example:

PARSEDATETIME('Sat, 3 Feb 2001 03:05:06 GMT', 'EEE, d MMM yyyy HH:mm:ss z', 'en', 'GMT')

QUARTER

QUARTER(timestamp)

Returns the quarter (1-4) from a timestamp.

Example:

QUARTER(CREATED)

SECOND

SECOND(timestamp)

Returns the second (0-59) from a timestamp.

Example:

SECOND(CREATED)

WEEK

WEEK(timestamp)

Returns the week (1-53) from a timestamp. This method uses the current system locale.

Example:

WEEK(CREATED)

YEAR

YEAR(timestamp)

Returns the year from a timestamp.

Example:

YEAR(CREATED)

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