Query like google

Question

Hello,
I want to write query to search from two columns of a table like google i.e. this is example query:
*""I want to see rebar companies in china"*
The following table has country and products ('rebar')
My table:
SQL> desc company;
Name                                      Null?    Type
CO_ID                                     NOT NULL NUMBER(9)
R_DATE                                             TIMESTAMP(0)
CONAME                                             VARCHAR2(140)
ESTYR                                              NUMBER(5)
COUNTRY                                            VARCHAR2(32)
PRODUCTS                                           VARCHAR2(3900)
SQL> /
     CO_ID COUNTRY                          PRODUCTS
       173 china                            pipe fitting,valves,tee,reducers,elbows
       174 china                            angle bar
       175 china                            formwork,wing nut ,rebar,spring clamp ,wedge bolt,top cup,tie rod,scaffolding
       176 belgium                          ferro alloy producer
       177 china                            skyjumper,sky jumper,poweriser,powerskip,power shoes,flyjumper,jumping stilts
SQL> Thanks & best regards

Answer 1

Google uses a very sophisticated search algorithm, so I think you'll be a little pushed to replicate that or get anyone on the forum to do it for you.
You may be able to get something from using Oracle Text, if that suits your needs.
Alternatively, if you're looking to write your own thing then you would need some way of parsing the question and ignoring certain common words that you're not interested in, picking out just the words you want and then searching the relevant columns for those words.
Here's a very basic example:
SQL> ed
Wrote file afiedt.buf
  1  with company as (select 173 as co_id, 'china' as country, 'pipe fitting,valves,tee,reducers,elbows' as products from dual union all
  2                   select 174, 'china', 'angle bar' from dual union all
  3                   select 175, 'china', 'formwork,wing nut ,rebar,spring clamp ,wedge bolt,top cup,tie rod,scaffolding' from dual union all
  4                   select 176, 'belgium', 'ferro alloy producer' from dual union all
  5                   select 177, 'china', 'skyjumper,sky jumper,poweriser,powerskip,power shoes,flyjumper,jumping stilts' from dual)
  6      ,question as (select 'I want to see rebar companies in china' as q from dual)
  7      ,ignore_words as (select 'i' as wrd from dual union all
  8                        select 'want' from dual union all
  9                        select 'to' from dual union all
10                        select 'see' from dual union all
11                        select 'companies' from dual union all
12                        select 'in' from dual)
13  --
14      ,question_words as (select lower(regexp_substr(q, '[^ ]+', 1, rownum)) wrd
15                          from question
16                          connect by rownum <= length(regexp_replace(q, '[^ ]'))+1
17                          minus
18                          select wrd from ignore_words)
19  --
20  select *
21  from company
22  where co_id in (
23                  select co_id
24                  from company c, question_words q
25                  where c.country = q.wrd
26                  intersect
27                  select co_id
28                  from company c, question_words q
29                  where instr(c.products, q.wrd) > 0
30*                )
SQL> /
     CO_ID COUNTRY PRODUCTS
       175 china   formwork,wing nut ,rebar,spring clamp ,wedge bolt,top cup,tie rod,scaffolding
SQL>