Full Discussion: how to read next records
how to read next records Post 302339533 by ubeejani on Thursday 30th of July 2009 06:00:16 PM
07-30-2009
Hello Bubbajoe,
The input should be a file with many data sets separated by blank line as shown in my previous post.Check the first data set if Col5 value for a specific record is increasing e.g Fre 42:86 and nie 25:76. For both these records in first data set the Col5 value is increasing. As we can see in the following first data set.
0.85 0.07 Fre 42:86 25
0.73 0.03 frp 21:10 28
0.64 0.04 Fre 42:86 63
0.47 0.08 nie 25:76 32
0.37 0.01 veb 00:71 26
0.63 0.48 Fre 42:86 65
0.65 0.32 frp 21:10 19
0.47 0.08 nie 25:76 43

Now read 2nd data set and check if for these records(Fre 42:86 and nie 25:76) the Col5 value is greater than 30. So if we look at the following 2nd data set, all the Col5 values for record(Fre 42:86) which was selected from first data set is greater than 30 and for record (nie 25:76) there is a Col5 value in 2nd data set which is less than 30 (0.53 0.56 nie 25:76 20). So we found one record which fulfilled the conditions(count=1).
0.53 0.56 nie 25:76 52
0.32 0.43 veb 00:71 18
0.85 0.07 Fre 43:86 40
0.65 0.32 frp 21:10 30
0.85 0.07 Fre 43:86 50
0.53 0.56 nie 25:76 20
0.65 0.32 frp 21:10 40
0.85 0.07 Fre 43:86 50

Similarly,now we will check the 2nd data set if Col5 value for a specific record is increasing.If we found any record in 2nd data set then we will read the 3rd data set and check if the Col5 value for those record in greater than 30. If true then again just count it.
and so on for next data sets.
I hope this time you got my problem but let me know if you still have any confusion.
Thank you so much for your time and cooperation.
Regards,
Ubee
 ubeejani View Public Profile for ubeejani Find all posts by ubeejani

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tracker-sparql(1)						   User Commands						 tracker-sparql(1)

NAME
tracker-sparql - Use SparQL to query the Tracker databases. SYNOPSIS
tracker-sparql [OPTION...] [-q QUERY] | [-f FILE] DESCRIPTION
tracker-sparql allows the caller to run an RDF query on the database. This can be done two ways. Either by providing a FILE with the query or by providing a string with the QUERY string. The FILE argument can be either a local path or a URI. It also does not have to be an absolute path. OPTIONS
-?, --help Show summary of options. -f, --file=FILE Use a FILE with SPARQL content to query or update. -q, --query=SPARQL Use a SPARQL string to query the database with. -u, --update This has to be used with --query. This tells tracker-sparql to use the SPARQL update extensions so it knows it isn't a regular data lookup request. So if your query is intended to change data in the database, this option is needed. -c, --list-classes Returns a list of classes which describe the ontology used for storing data. These classes are also used in queries. For example, http://www.w3.org/2000/01/rdf-schema#Resource is one of many classes which should be returned here. -x, --list-class-prefixes Returns a list of classes and their related prefixes. Prefixes are used to make querying a lot simpler and are much like an alias. For example, http://www.w3.org/2000/01/rdf-schema#Resource has the prefix rdfs so queries can be cut down to: "SELECT ?u WHERE { ?u a rdfs:Resource }" -p, --list-properties=CLASS Returns a list of properties which pertain to a class. You can use both formats here for the class, either the full name http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#Video or the shortened prefix name nfo:Video. This gives the following result: \$ tracker-sparql -p nfo:Video Properties: 2 http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#frameRate http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#frameCount These properties nfo:frameRate and nfo:frameCount can be used in more complex queries (see --query). -n, --list-notifies=CLASS Returns a list of classes which are notified over D-Bus about any changes that occur in the database. CLASS does not have to be sup- plied here. This is optional and filters the results according to any argument supplied. With no CLASS, all classes are listed. -s, --search=TERM Returns a list of classes and properties which partially match TERM in the ontology. This is a case insensitive match, for example: \$ tracker-sparql -s text Classes: 4 http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#TextDocument http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#PlainTextDocument http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#PaginatedTextDocument http://www.tracker-project.org/temp/nmm#SynchronizedText Properties: 5 http://www.tracker-project.org/ontologies/tracker#fulltextIndexed http://www.tracker-project.org/ontologies/tracker#fulltextNoLimit http://www.semanticdesktop.org/ontologies/2007/01/19/nie#plainTextContent http://www.semanticdesktop.org/ontologies/2007/03/22/nmo#plainTextMessageContent http://www.tracker-project.org/temp/scal#textLocation -V, --version Print version. EXAMPLES
List all classes \$ tracker-sparql -q "SELECT ?cl WHERE { ?cl a rdfs:Class }" List all properties for the Resources class (see --list-properties) \$ tracker-sparql -q "SELECT ?prop WHERE { ?prop a rdf:Property ; rdfs:domain <http://www.w3.org/2000/01/rdf-schema#Resource> }" List all class namespace prefixes \$ tracker-sparql -q "SELECT ?prefix ?ns WHERE { ?ns a tracker:Namespace ; tracker:prefix ?prefix }" List all music files \$ tracker-sparql -q "SELECT ?song WHERE { ?song a nmm:MusicPiece }" List all music albums \$ tracker-sparql -q "SELECT ?album ?title COUNT(?song) AS songs SUM(?length) AS totallength WHERE { ?album a nmm:MusicAlbum ; nie:title ?title . ?song nmm:musicAlbum ?album ; nfo:duration ?length } GROUP BY ?album" List all music from a particular artist \$ tracker-sparql -q "SELECT ?song ?title WHERE { ?song nmm:performer [ nmm:artistName 'Artist Name' ] ; nie:title ?title }" Set the played count for a song \$ tracker-sparql -u -q "DELETE { <file:///home/user/Music/song.mp3> nie:usageCounter ?count } WHERE { <file:///home/user/Music/song.mp3> nie:usageCounter ?count } INSERT { <file:///home/user/Music/song.mp3> nie:usageCounter 42 }" List all image files \$ tracker-sparql -q "SELECT ?image WHERE { ?image a nfo:Image }" List all image files with a specific tag \$ tracker-sparql -q "SELECT ?image WHERE { ?image a nfo:Image ; nao:hasTag [ nao:prefLabel 'tag' ] }" List all image files created on a specific month and order by date \$ tracker-sparql -q "SELECT ?image ?date WHERE { ?image a nfo:Image ; nie:contentCreated ?date . FILTER (?date >= '2008-07-01T00:00:00' && ?date < '2008-08-01T00:00:00') } ORDER BY ?date" SEE ALSO
tracker-store(1), tracker-info(1). http://nepomuk.semanticdesktop.org/ http://www.w3.org/TR/rdf-sparql-query/ GNU
July 2009 tracker-sparql(1)

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