how to search (filter) substrings using a query component in a BDE database?

I have a BDE database with three fields: two memos and one string field. I want to searchand filter  the string field to find partial strings. I mean, I want to filter the database (and to see the results in a dbgrid who is present in my form) if I search for the string "nd". The system should show me the records with this specific field 'nd', for instance 'random' or 'and', but hide records with 'hello' string...

I tried this:

    Query1.Sql.Add('select * from database where field like '+QuotedStr('%'+SearchStr+'%'));

but it didnt work...Any ideas what I am doing wrong? Should I have the string field indexed?
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TheRealLokiSenior DeveloperCommented:
normally in SQL you can use "like" as in
select * from table1 where FirstName like '%something%'
the % being a wildcard
However, I don't think BDE supports this.
You could however, use the "OnFilter" event.
set the "filtered" property to true and then in the onfilter event you use
Accept := (pos(edit1.text, dataset.FieldByName('SomeField').AsString > 0);

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Hi !
Try this way:
       with Query do
          Sql.add('select * from database where field like :p');
          Parambyname('p').asstring := '%' +SearchStr+ '%';

lopemAuthor Commented:
Thanks a lot. Simple answer and very useful...

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