searchfield is part of the catalog search options. With searchfield you can search in a specific collumn only. You can also combine multiple searchfields for complex searchforms.
Parameters
FIELDNAME - Name of a field in your database
cond (optional) - The search condition Valid conditions are
like (default) - Match any coincidence
exact - Fieldcontent must match
min - Fielvalue is higher or equal (e.G. find all Products more expensive then 4 $)
max - Fielvalue is lower or equal
start - Fieldcontent starts with (e.G. find entries with date 2014 but not from 2015)
end - Fieldcontent ends with
Example
Search by field
Title {joodb searchfield|title}
Author {joodb searchfield|author}
Genre {joodb searchfield|genre|exact}
Published {joodb searchfield|published|min} - {joodb searchfield|published|max}
Search for values in different fields
Notes
If you have multiple searchfield the terms are combined by AND.
With the fieldlist parameter of searchbox you can outut a select list with fields to search in.
You can combine min and max with the same field to find all entries within a range of these two values.