FoxPro is very good at processing dates and can handle values between Jan
1st 0001 and Dec 31st 9999. All Leap Years are treated correctly. Its
only real weakness is that it still includes the 11 days dropped on the
changeover between Julian and Gregorian calendars in 1752.
Remember that the VFP syntax requires that functions are always followed by a
pair of brackets even if, as with the DATE function, there's nothing in them.
| CDOW(<date>) |
return the name of the day of the week of <date>. |
| CMONTH(<date>) |
return the name of the month of <date>. |
| CTOD(<text>) |
return <text> as a variable of type Date. Note that
CTOD() will fail if
STRICTDATE
is set to 2.
|
| CTOT(<text>) |
return <text> as a DateTime. Note
that CTOT() will fail if
STRICTDATE
is set to 2.
|
| DATE() |
return today's date in the format specified by SET DATE and SET CENTURY. |
| DATE(<yyyy>,<mm>,<dd>) |
return a date variable holding dd/mm/yyyy. Use this function
in place of
CTOD()
when
STRICTDATE
is set to 2
|
| DMY(<date>) |
return <date> in full as a string of characters such as
"25 December 2007".
|
| DOW(<date>) |
return the day of the week of <date> as a number with
Sunday counting as Day 1.
|
| DTOC(<date>) |
return <date> as a variable of type string in
'dd/mm/yy' or 'dd/mm/yyyy' format depending on the state of
SET CENTURY
and
SET DATE.
|
| DTOS(<date>) |
return <date> as a variable of type string in 'yyyymmdd'
format. The year will include the century digits regardless of
the state of
SET CENTURY
Use DTOS() when you are wanting to index on a composite expression such
as Surname + DTOS(DateOfBirth).
|
| DTOT(<date>) |
return <date> as a DateTime with the time set to 12:00:00 am.
|
| GOMONTH(<date>, <n>) |
return a date <n> months after <date>. The VFP GOMONTH function
makes sensible decisions about the calendar. For example, it returns Feb 28th
(or 29th in a Leap Year) as being one month after Jan 31st rather than trying to
set Feb 31st.
|
| MONTH(<date>) |
return the month of <date> as a number between 1 and 12.
|
| SECONDS() |
return the number of seconds since midnight. Given with three
decimal places but not guaranteed to that accuracy.
SYS(2)
gives a similar value as text rather than as numeric. Use the SECONDS function
if you are needing to do arithmetic with the value, use SYS(2) if you are
using it for something like a temporary file name.
|
| SET CENTURY ON|OFF |
show or hide the century digits when dates are displayed. Note
that VFP still stores the century information whether CENTURY
is ON or OFF.
|
| SET CENTURY TO <cc> ROLLOVER <yy> |
set a 100-year window for years entered as two digits. Years
after the <yy> limit will be treated as belonging to the
century specified as <cc>. Years before that point will
be treated as belonging to the next century.
|
| SET DATE |
set the format for displaying dates. For example SET DATE
BRITISH.
|
| SET STRICTDATE TO 0|1|2 |
restrict the formatting of dates. A value of 1 or 2 forces you to enter dates
in an unusual {^yyyy-mm-dd} format. A value of 2 also prevents you using the
CTOD()
or
CTOT()
functions at all.
|
| SYS(2) |
return the number of whole seconds since midnight as text. Note that the VFP
function
SECONDS()
gives it as a number with three decimal places. Use the SECONDS function
if you are needing to do arithmetic with the value, use SYS(2) if you are
using it for something like a temporary file name.
|
| TIME() |
return the current time as an eight-character string
"hh:mm:ss".
|
