Need formula help for searching sheet

Question

Hi
I have a numbers document that contains
Sheet 10-1
Sheet 10-2
Sheet 10-3
Sheet 10-4
Each of these sheets contains three columns.
Column one has a clientnumber and column two has a projectnum.
Column three contains a reference to a particular place.
I would like to have a specific sheet that where one can search the other sheets for a projectnumber and return the reference in the third column for that particular projectnum.
I can do this in one sheet but I am unable to figure out how to search mutliple sheets.
Thanks for any input

Answer 1

Hi c'
You wrote:
I have used the following formula to search from Searchsheet in sheet 1111-1
=LOOKFOR(A1;'Låda 1111-1' :: Uppdragsnr;'Låda 1111-1' :: Låda nr)
(its called LETAUPP in Swedish, som I'm guessing the english equivalent is LOOKFOR).
From the syntax, the English equivalent appears to be LOOKUP(search-for;search-where;result-values)
Numbers supports three similar LOOKUP functions, LOOKUP, VLOOKUP and HLOOKUP.
I'm guessing the Swedish function names for the other two are going to be VLETAUPP and HLETAUPP.
VLOOKUP and HLOOKUP are able to find a "close match", or can be set to accept only an "exact match". LOOKUP cannot be set to demand an exact match, and will accept "the largest value less than or equal to the search value"
"exact-match" is useful in that it can generate an error message which can be used to pass the search on to the next table.
Here's an example of the difference in results of LOOKUP and VLOOKUP, using your project numbers. Description below.
Data table at the left. Search tables in the center and at right.
B2 of the center table contains =LOOKUP(A2,Table 1 :: B,Table 1 :: C)
- filled down to B6.
Note the result for 934, a value not included on the data table.
'Can't find' errors are returned for the empty cells in rows 5 and 6.
B7 and below contain a revised formula: =IFERROR(LOOKUP(A7,Table 1 :: B,Table 1 :: C),"not found")
This traps the error in row 10, but does nothing to intercept the wrong result in row 8 (934).
The second result table uses VLOOKUP, set to require an exact match.
B2, filled down to B6: =VLOOKUP(A2,Table 1 :: B:C,2,FALSE)  -"FALSE" is the argument to force an exact match.
934 now correctly returns a "can't find" error, as do the empty search for values in rows 5 and 6.
B7 and below use IFERROR to trap the errors:
=IFERROR(VLOOKUP(A7,Table 1 :: B:C,2,FALSE),"not found")
In my earlier post, the "can't find" error trap was used to trigger a search of the next table (and in the last search, was used to produce the "not found" message.
Because I also didn't want a "not found" message to appear when no search value had been entered, I added an IF statement:
IF(search-for has an entry,do the search,show a 'blank' cell).
Regards,
Barry