Translate from table of values

Question

oracle 10.2.0.5 ent ed
create table test_1 ( col_1 number, col_2 varchar2(50));
create table test_2 ( col_1 number, col_2 varchar2(15), col_3 varchar2(15));
insert into test_1 values (1, 'this is a string');
insert into test_1 values (2, 'this is a second string');
insert into test_1 values (3, 'this is frist string');
insert into test_2 values (1, 'is a', 'is not a');
insert into test_2 values (2, 'second', 'tenth');
insert into test_2 values (3, 'frist', 'first');
is there a way to write a create table as select from test_1 where the resulting data set would be like the following?
1 this is not a string
2 this is not a tenth string
3 this is first string
in other words replace any sub-string in test_1.col_2 that matches test_2.col2 with that value in test_2.col_3.
I was thinking translate would work by using select statements for the match & replace patterns, but realize that would return multiple records and wouldn't work.
Edited by: 886364 on Nov 16, 2012 10:35 AM

Answer 1

You can use REPLACE function
SQL> with test_1 as
  2      (
  3      select 1 col_1, 'this is a string' col_2 from dual union all
  4      select 2 col_1, 'this is a second string' col_2 from dual union all
  5      select 3 col_1, 'this is frist string' col_2 from dual
  6      ),
  7      test_2 as
  8      (
  9      select 1 col_1, 'is a' col_2, 'is not a' col_3  from dual union all
10      select 2 col_1, 'second' col_2, 'tenth' col_3  from dual union all
11      select 3 col_1, 'frist' col_2, 'first' col_3  from dual
12      )
13  select
14      test_1.col_2,
15      replace(test_1.col_2, test_2.col_2, test_2.col_3) after
16  from
17      test_1,
18      test_2
19  where
20      test_1.col_1 = test_2.col_1;
COL_2                   AFTER
this is a string        this is not a string
this is a second string this is a tenth string
this is frist string    this is first string