Search for Multiple keywords in multiple fields


J

JP SIngh

Hi All

This is a complicated one, not for the faint hearted :) :) :)

Please help if you can how to achieve this search.

We have a freetext search entry box to allow users to search the database. I
am searching two tables.

SELECT TapeRecords.Id, TapeRecords.ItemTitle, TapeRecords.SourceRef,
TapeRecords.ItemYear, TapeRecords.TapeNumber FROM TapeRecords WHERE
TapeRecords.Id In (select tapenumber from TapeLogDetails where
TapeLogDetails.Description LIKE '%%asia%%' ) OR (TapeRecords.ItemTitle LIKE
'%%asia%%' ) OR (TapeRecords.Location LIKE '%%asia%%') OR
(TapeRecords.Country LIKE '%%asia%%') OR (TapeRecords.Keywords LIKE
'%%asia%%') ORDER BY TapeRecords.Id DESC;

The search logic also needs to allow users to search for multiple entries

for example if I was to type Asia Burma

it should find all records where asia and burma appears. Sound simple , well
it is not.

Because my researchers requires the search to work where the either of the
two words (i.e. Asia and Burma) were present in any combination of the
fields.

i.e Asia might be in description and Burma might be in any of the other
fields, i.e. to find the two keywords in any combination.

can anyone help?
 
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D

dNagel

Without reading and digesting everything you've written, couldn't you
use a Union to simplify the logic?

Select [blah, blah,blah] from [TapeRecords] Where [Somecondition]
UNION
Select [blah, blah,blah] from [TapeRecords] Where [SomeOthercondition]
UNION
Select [blah, blah,blah] from [TapeRecords] Where [YetAnothercondition]

D?
 
D

dNagel

I meant to change the table name each tie but I forgot... D.

Without reading and digesting everything you've written, couldn't you
use a Union to simplify the logic?

Select [blah, blah,blah] from [TapeRecords] Where [Somecondition]
UNION
Select [blah, blah,blah] from [TapeRecords] Where [SomeOthercondition]
UNION
Select [blah, blah,blah] from [TapeRecords] Where [YetAnothercondition]

D?

JP said:
Hi All

This is a complicated one, not for the faint hearted :) :) :)

Please help if you can how to achieve this search.

We have a freetext search entry box to allow users to search the
database. I am searching two tables.

SELECT TapeRecords.Id, TapeRecords.ItemTitle, TapeRecords.SourceRef,
TapeRecords.ItemYear, TapeRecords.TapeNumber FROM TapeRecords WHERE
TapeRecords.Id In (select tapenumber from TapeLogDetails where
TapeLogDetails.Description LIKE '%%asia%%' ) OR (TapeRecords.ItemTitle
LIKE '%%asia%%' ) OR (TapeRecords.Location LIKE '%%asia%%') OR
(TapeRecords.Country LIKE '%%asia%%') OR (TapeRecords.Keywords LIKE
'%%asia%%') ORDER BY TapeRecords.Id DESC;

The search logic also needs to allow users to search for multiple entries

for example if I was to type Asia Burma

it should find all records where asia and burma appears. Sound simple
, well it is not.

Because my researchers requires the search to work where the either of
the two words (i.e. Asia and Burma) were present in any combination of
the fields.

i.e Asia might be in description and Burma might be in any of the
other fields, i.e. to find the two keywords in any combination.

can anyone help?
 
J

JP SIngh

Paul

Thanks for this but this the simplest example. What I trying to work out is
much complicated.

Here are my tables if any of your wizards can crack

TABLE - TapeRecords

Id (primary key)
ItemTitle
Location

TABLE - TapeLogDetails

TapeNumber (foreign key
Description

If the user enters Asia Burma I split the phrase into two keywords using
array.

For the above example I want to return the record where both the search
terms appear in the Item Title but also want to display the record where
"Burma" appears in Title and "Asia" appear in any of the other fields
including TapeLogDetails.Description.

Please help if you can
 
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B

Bob Barrows [MVP]

JP said:
Hi All

This is a complicated one, not for the faint hearted :) :) :)

Please help if you can how to achieve this search.

We have a freetext search entry box to allow users to search the
database.

What database?
I am searching two tables.

SELECT TapeRecords.Id, TapeRecords.ItemTitle, TapeRecords.SourceRef,
TapeRecords.ItemYear, TapeRecords.TapeNumber FROM TapeRecords WHERE
TapeRecords.Id In (select tapenumber from TapeLogDetails where
TapeLogDetails.Description LIKE '%%asia%%' ) OR
(TapeRecords.ItemTitle LIKE '%%asia%%' ) OR (TapeRecords.Location
LIKE '%%asia%%') OR (TapeRecords.Country LIKE '%%asia%%') OR
(TapeRecords.Keywords LIKE '%%asia%%') ORDER BY TapeRecords.Id DESC;

The search logic also needs to allow users to search for multiple
entries

for example if I was to type Asia Burma

it should find all records where asia and burma appears. Sound simple
, well it is not.

Because my researchers requires the search to work where the either
of the two words (i.e. Asia and Burma) were present in any
combination of the fields.

i.e Asia might be in description and Burma might be in any of the
other fields, i.e. to find the two keywords in any combination.

can anyone help?

It sounds as if you need a full-text index. If you are using SQL Server,
this is built in and i suggest you go to microsoft.public.sqlserver.fulltext
for help with this.

If you are using Access, then my first suggestion is to migrate to SQL
Server so you can use full-text indexing. If that's not possible, then you
are going to need to roll your own ... trust me, this is not a task for the
faint-hearted.
The task (which I have never done so I cannot provide any details) involves
creating a separate table containing the record ID's and the keywords
contained in the records (you may also need to store the field names from
which the keywords came so that you can narrow down your search to specific
fields). Something like this:

TapeRecordIndex:
Id
Keyword
Fieldname

All three fields should be combined into a unique index.

You will also need a table containing "nuisance" words, i.e., words to be
avoided when generating the index. Words such as "and", "the", etc.

You will need an offline scheduled task to periodically generate/refresh the
index. The program will go through each record, looping through the fields
and splitting the text contained in the fields into individual keywords,
generating individual index records containing the index entries (idnoring
the list of nuisance words). For example, if you had these records

TapeRecord
1 Mission to Burma Asia

TapeLogDetails
1 Sample description of the Mission to Burma tape

You would wind up with:

TapeRecordIndex
1 Mission Title
1 Burma Title
1 Asia Location
1 Sample Description
etc.

This allows:
SELECT Id From TapeRecordIndex
WHERE keyword in (Burma, Asia)

This can be joined to the source tables to extract the source data.

Bob Barrows
 
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