Compare date against row in mysql

[xxclear]

Ok, so i am trying to compare a date stored as a variable against a row in mysql, this is where i am so far:

 

 

I need to be able to search the table for:

 

1) a search keyword

2) a combination of a date, for example (just 2013) or (march-2012) or (7th of june) or (5th of september 2012) or (just the 16th) etc...

$result = mysqli_query($link, " SELECT id, auditor, auditee, datum, department, func, proc, audit_type, copy_to, comments

FROM audit_data

WHERE
(
`auditor` LIKE '%$search_field%' OR
`auditee` LIKE '%$search_field%' OR
`department` LIKE '%$search_field%' OR
`func` LIKE '%$search_field%' OR
`proc` LIKE '%$search_field%' OR
`audit_type` LIKE '%$search_field%')
OR
(`id` = '$radio_id')
OR
(datum = '$datum')
" )
OR 
die(mysqli_error($link));
 

• Its only a small table otherwise I would be indexing.
• The variable and row are both stored in native format (YYYY-MM-DD)

(If i put in a keyword into my $search_field it displays all the rows with a match, that works a treat).

 

The above example shows an exact match between the row and var which as it happen doesnt work. I have a calender setup on the input form and search form that will put in any date like this 2013-04-08 or 2013-00-08 etc. Logically this is what i want (unfortunately doesn't work):

if day($datum) = "00" {day($datum) = ""}
else { day($datum) = day($_REQUEST['date1'] }
if month($datum) = "00" {month($datum) = ""}
else { month($datum) = month($_REQUEST['date1'] }
if year($datum) = "0000" {year($datum) = ""}
else { year($datum) = year($_REQUEST['date1'] }

// select

select * from audit_data where `datum` = 
if(isset(day($datum))){day($datum)} OR
if(isset(month($datum))){month($datum)} OR
if(isset(year($datum))){year($datum)} OR
OR
[search keyword code here]
 

 

date1 being the calender output...

 

If the above seem odd, or simply wrong, forgive me, im just trying to get the point across as clear as i can.

Can anybody give me a head start on how to do this, any advice, links, examples, structure will be greatly appreciated!

[xxclear]

Don't shy away chap & chapettes, any advice will be appreciated.