European Journal of Scientific Research - EuroJournals

Database Interfacing using Natural Language Processing 847
Table 02: Generating INSERT Query from text
Lexicons Phase-I Phase –II
I Noun -----------
want Verb -----------
to Preposition -----------
insert Verb Action
a article -----------
student Noun Table Name
whose Conjunction -----------
Roll No Noun Attribute
is Helping Verb ------------
5 Noun Value
and Conjunction ------------
Name Noun Attribute
is Helping Verb ------------
Ali Noun Value
In this example the ‘Required Set’ field is filled by the ‘Filed Name’ attribute and the ‘Table
Name’ filed is filled by the ‘Table Name’ attribute. Here the table Name is searched from the array of
available all table sin the database. From all available tables, the nearest table name is picked that
‘students’ in this example.
3.3. DELETE Query
Same like ‘SELECT’ and ‘INSERT’ queries ‘DELETE’ query can also be easily processed. ‘DELETE’
query has five parts as following:
DELETE FROM Students WHERE Age > 25
Keyword Keyword Table Name Keyword Condition
The ‘DELETE’ query typically consists of three keywords as ‘DELETE’, ‘FROM’ and
‘WHERE’. Other two required values are ‘Table Name’ and ‘Condition’. To find ‘Table Name’ and
‘Condition’ parameters the English language defined grammatical rule are used as in the following
example:
“I want to delete the students more than 25 years age.”
Following is the complete analysis of this simple sentence.
Table 03: Generating DELETE Query from text
Lexicons Phase-I Phase –II
I Noun ---------
want Verb ---------
to preposition ---------
delete verb Action
the article ---------
students Noun Table Name
more preposition Condition
than Noun ----------
25 Noun Value
years Noun -----------
age Noun Parameter
For ‘DELETE’ query, first the condition is defined. In this example Parameter and Value are
combined with Condition parameters. In this example table Name is also retrieved from the array of
available all tables in the database.