SQL Concatenate strings across multiple columns with corresponding values - sql

Question

I'm looking for a way to achieve this in a SELECT statement.
FROM
Column1 Column2 Column3
A,B,C 1,2,3 x,y,z
TO
Result
A|1|x,B|2|y,C|3|z
The delimiters don't matter. I'm just trying to to get all the data in one single column. Ideally I am looking to do this in DB2. But I'd like to know if there's an easier way to get this done in Oracle.
Thanks

Answer 1

You can do it like this using INSTR and SUBSTR:
select
substr(column1,1,instr(column1,',',1)-1) || '|' ||
substr(column2,1,instr(column2,',',1)-1) || '|' ||
substr(column3,1,instr(column3,',',1)-1) || '|' ||
',' ||
substr(column1 ,instr(column1 ,',',1,1)+1,instr(column1 ,',',1,2) - instr(column1 ,',',1)-1) || '|' ||
substr(column2 ,instr(column2 ,',',1,1)+1,instr(column2 ,',',1,2) - instr(column2 ,',',1)-1) || '|' ||
substr(column3 ,instr(column3 ,',',1,1)+1,instr(column3 ,',',1,2) - instr(column3 ,',',1)-1) || '|' ||
',' ||
substr(column1 ,instr(column1 ,',',1,2)+1) || '|' ||
substr(column2 ,instr(column2 ,',',1,2)+1) || '|' ||
substr(column3 ,instr(column3 ,',',1,2)+1)
from yourtable

Answer 2

i tried some thing. just look into link
first i created a table called t_ask_test and inserted the data based on the above question. Achieved the result by using the string functions
sample table
create table t_ask_test(column1 varchar(10), column2 varchar(10),column3 varchar(10));
inserted a row
insert into T_ASK_TEST values ('A,B,C','1,2,3','x,y,z');
the following query will be in dynamic way
select substr(column1,1,instr(column1,',',1,1)-1)||'|'||substr(column2,1,instr(column1,',',1,1)-1)||'|'||substr(column3,1,instr(column1,',',1,1)-1) ||','||
substr(column1,instr(column1,',',1,1)+1,instr(column1,',',1,2)-instr(column1,',',1,1)-1)||'|'||substr(column2,instr(column2,',',1,1)+1,instr(column2,',',1,2)-instr(column2,',',1,1)-1)||'|'||substr(column3,instr(column3,',',1,1)+1,instr(column3,',',1,2)-instr(column3,',',1,1)-1) ||','||
substr(column1,instr(column1,',',1,2)+1,length(column1)-instr(column1,',',1,2))||'|'||substr(column2,instr(column2,',',1,2)+1,length(column2)-instr(column2,',',1,2))||'|'||substr(column3,instr(column3,',',1,2)+1,length(column3)-instr(column3,',',1,2)) as test from t_ask_test;
output will be as follows
TEST
---------------
A|1|x,B|2|y,C|3|z

Answer 3

If you have a dynamic number of entries for each row then:
SQL Fiddle
Oracle 11g R2 Schema Setup:
CREATE TABLE TEST ( Column1, Column2, Column3 ) AS
SELECT 'A,B,C', '1,2,3', 'x,y,z' FROM DUAL
UNION ALL SELECT 'D,E', '4,5', 'v,w' FROM DUAL;
Query 1:
WITH ids AS (
SELECT t.*, ROWNUM AS id
FROM TEST t
)
SELECT LISTAGG(
REGEXP_SUBSTR( i.Column1, '[^,]+', 1, n.COLUMN_VALUE )
|| '|' || REGEXP_SUBSTR( i.Column2, '[^,]+', 1, n.COLUMN_VALUE )
|| '|' || REGEXP_SUBSTR( i.Column3, '[^,]+', 1, n.COLUMN_VALUE )
, ','
) WITHIN GROUP ( ORDER BY n.COLUMN_VALUE ) AS value
FROM ids i,
TABLE(
CAST(
MULTISET(
SELECT LEVEL
FROM DUAL
CONNECT BY LEVEL <= GREATEST(
REGEXP_COUNT( i.COLUMN1, '[^,]+' ),
REGEXP_COUNT( i.COLUMN2, '[^,]+' ),
REGEXP_COUNT( i.COLUMN3, '[^,]+' )
)
)
AS SYS.ODCINUMBERLIST
)
) n
GROUP BY i.ID
Results:
| VALUE |
|-------------------|
| A|1|x,B|2|y,C|3|z |
| D|4|v,E|5|w |

Answer 4

You need to use:
SUBSTR
INSTR
|| concatenation operator
It would be easy if you break your output, and then understand how it works.
SQL> WITH t AS
2 ( SELECT 'A,B,C' Column1, '1,2,3' Column2, 'x,y,z' Column3 FROM dual
3 )
4 SELECT SUBSTR(column1, 1, instr(column1, ',', 1) -1)
5 ||'|'
6 || SUBSTR(column2, 1, instr(column2, ',', 1) -1)
7 ||'|'
8 || SUBSTR(column3, 1, instr(column1, ',', 1) -1)
9 ||','
10 || SUBSTR(column1, instr(column1, ',', 1, 2) +1 - instr(column1, ',', 1),
11 instr(column1, ',', 1) -1)
12 ||'|'
13 || SUBSTR(column2, instr(column2, ',', 1, 2) +1 - instr(column2, ',', 1),
14 instr(column2, ',', 1) -1)
15 ||'|'
16 || SUBSTR(column3, instr(column3, ',', 1, 2) +1 - instr(column3, ',', 1),
17 instr(column3, ',', 1) -1)
18 ||','
19 || SUBSTR(column1, instr(column1, ',', 1, 3) +1 - instr(column1, ',', 1),
20 instr(column1, ',', 2) -1)
21 as "new_column"
22 FROM t;
new_column
-------------
A|1|x,B|2|y,C
On a side note, you should avoid storing delimited values in a single column. Consider normalizing the data.
From Oracle 11g and above, you could create a VIRTUAL COLUMN using the above expression and use it instead of executing the SQL frequently.

Answer 5

Its very simple in oracle. just use the concatenation operatort ||.
In the below solution, I have used underscore as the delimiter
select Column1 ||'_'||Column2||'_'||Column3 from table_name;