How do you convert an inputted date to a week number in a query please.

Thanks in advance. :)

Use this -
Format([YourDateHere],"ww")

Col

Thanks :D

There is a wealth of information related to the Format() function. Unfortunately, you have to dig for it in some cases. Search for "format function" from help in the VBA window rather than help in the database container window. Look at all the links in the "See Also" reference to see all the available arguments and also how to use the named formats.

Here's a COBOL program that does that. COBOL is easy enough to figure out so you should be able to adapt this for your needs. You're probably realizing about now that you're asking for something a little complicated.

/*================================================= ================ */
Zeller:proc(ccyy,mm,dd) returns(fixed bin(31));
/* 0=sat 1=sun 2=mon 3=tue 4=wed 5=thu 6=fri */

dcl ccyy fixed bin(31);
dcl dd fixed bin(31);
dcl mm fixed bin(31);
dcl n1 fixed bin(31) init(000);
dcl n2 fixed bin(31) init(000);
dcl r fixed bin(31) init(000);
dcl wccyy fixed bin(31) init(000);
dcl wm fixed bin(31) init(000);
dcl wccyyd400 fixed bin(31) init(000);
dcl wccyyd100 fixed bin(31) init(000);
dcl zday_num fixed bin(31) init(000);

wccyy=ccyy ;
wm=mm ;
If wm < 3 then do;
wm = wm + 12;
wccyy = ccyy - 1;
End;

n1 = (wm + 1) * 26 / 10 ;
n2 = wccyy * 125 / 100 ;
wccyyd400 = wccyy / 400;
wccyyd100 = wccyy / 100;
zday_num = wccyyd400 - wccyyd100 + dd + n1 + n2 ;

r = zday_num / 7;

zday_num = zday_num - r * 7 ;

return(zday_num);
end Zeller;
/*================================================= ================ */

COBOL program to convert date into day of week using Zellers algorithm

--------------------------------------------------------------------------------

IDENTIFICATION DIVISION.
PROGRAM-ID. ZELLER.
AUTHOR. William Evers email:wevers@allmerica.com

************************************************** ****************
* --- COBOL 3 --- *
* RECEIVE A DATE IN FORMAT CCYYMMDD AND RETURNS AN INTEGER *
* THAT REPRESENTS THE DAY OF THE WEEK. *
* (BASED ON ZELLER'S ALGORITM) *
* 1 = SUNDAY *
* 2 = MONDAY *
* 3 = TUESDAY *
* 4 = WEDNESDAY *
* 5 = THURSDAY *
* 6 = FRIDAY *
* 7 = SATURDAY *
************************************************** ****************
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
INPUT-OUTPUT SECTION.
FILE-CONTROL.

************************************************** ****************
DATA DIVISION.
FILE SECTION.
WORKING-STORAGE SECTION.
01 WS-CCYY PIC 9(04) COMP-3.
01 WS-MM PIC 9(02) COMP-3.
01 WS-N1 PIC 9(10) COMP-3.
01 WS-N2 PIC 9(10) COMP-3.
01 WS-DAY-INTEGER PIC 9(10) COMP-3.
01 WS-CCYYD400 PIC 9(10) COMP-3.
01 WS-CCYYD100 PIC 9(10) COMP-3.

LINKAGE SECTION.
01 LK-CCYYMMDD.
05 LK-CCYY PIC 9(4).
05 LK-MM PIC 99.
05 LK-DD PIC 99.
01 LK-DAY PIC 9.

************************************************** ****************
PROCEDURE DIVISION USING LK-CCYYMMDD
LK-DAY.
0000-MAIN.

IF LK-MM < 3
COMPUTE WS-MM = LK-MM + 12
COMPUTE WS-CCYY = LK-CCYY - 1
ELSE
MOVE LK-MM TO WS-MM
MOVE LK-CCYY TO WS-CCYY
END-IF

COMPUTE WS-N1 = (WS-MM + 1) * 26 / 10
COMPUTE WS-N2 = WS-CCYY * 125 / 100
COMPUTE WS-CCYYD400 = WS-CCYY / 400
COMPUTE WS-CCYYD100 = WS-CCYY / 100
COMPUTE WS-DAY-INTEGER = WS-CCYYD400 - WS-CCYYD100
+ LK-DD + WS-N1 + WS-N2
COMPUTE LK-DAY = FUNCTION REM (WS-DAY-INTEGER, 7)

IF LK-DAY = 0
MOVE 7 TO LK-DAY
END-IF.

EXIT PROGRAM.

************************************************** ****************

Banaticus!
I'm surprised you can still read those 8" floppies!:p

Well, I'm not that old, but I remember when my Dad came home with a "new" computer and suddenly I couldn't play any of my 5.5" floppy games anymore. "Nobody uses those anymore," he told me. Sigh.

Thanks for the reference to format(). Reading up on it at http://www.apostate.com/programming/vb-format.html "ww" will display the week of the year as a number (1 - 53). I thought the original poster was asking about format(yourDateHere, "w") which would display the day of the week as a number (1 for Sunday through 7 for Saturday).

I thought the original poster was asking about format(yourDateHere, "w") which would display the day of the week as a number (1 for Sunday through 7 for Saturday).

The clue was in the "How do you convert an inputted date to a week number " part of the question.:rolleyes: :D ;)

Col

Thanks :D Did this work Week: Format([downtime],"ww")? I get an undefined expression error. Any suggestions?