Separating multiple rows of a select query using delimiter (Oracle) - plsql

Question

I have a query
SELECT originating_timestamp
FROM sys.x$dbgalertext
WHERE message_text LIKE '%Starting up%'
and to_char(ORIGINATING_TIMESTAMP,'DD-MON-YY') = to_char(systimestamp,'DD-MON-YY');
The output in a linux script is as below:
09-OCT-17 04.59.33.758 AM -05:00 09-OCT-17 05.03.22.645 AM -05:00
there are two rows above each starting by date.
I would like to have the output like
09-OCT-17 04.59.33.758 AM -05:00;09-OCT-17 05.03.22.645 AM -05:00
This is just two rows, there can be many more, I would like it so that every row is separated via delimiter.
I have tried few options like
1) using listagg:
select listagg(originating_timestamp,', ') within group(order by originating_timestamp) csv
from sys.x$dbgalertext
WHERE message_text LIKE '%Starting up%'
and to_char(ORIGINATING_TIMESTAMP,'DD-MON-YY') = to_char(systimestamp,'DD-MON-YY');
But this gives error:
ERROR at line 1:
ORA-01489: result of string concatenation is too long
2) using XMLAGG:
SELECT RTRIM(XMLAGG(XMLELEMENT(E,originating_timestamp,';').EXTRACT('//text()') ORDER BY originating_timestamp).GetClobVal(),',') AS LIST
FROM sys.x$dbgalertext
WHERE message_text LIKE '%Starting up%'
and to_char(ORIGINATING_TIMESTAMP,'DD-MON-YY')= to_char(systimestamp,'DD-MON-YY');
But the output is like :
2017-10-09T04:59:33.758-05:00;2017-10-09T05:03:22.645-05:00;
Which is also not correct.
e.g. Select username from dba_users. Suppose there are 10 users, i want those 10 usernames to be separated via delimiter.

Answer 1

Below two anonymous block example which may be helpful to solve your problem :
SET SERVEROUTPUT ON SIZE 1000000
DECLARE
res VARCHAR2(100);
tmp VARCHAR2(100);
BEGIN
FOR i IN 1..10 LOOP
IF i != 10 THEN
select 'a' ||',' into tmp from dual;
ELSE
select 'a' into tmp from dual;
END IF;
res := concat(res,tmp);
END LOOP;
DBMS_OUTPUT.PUT_LINE(res);
END;
/
Second :
SET SERVEROUTPUT ON SIZE 1000000
DECLARE
res VARCHAR2(1000);
tmp VARCHAR2(1000);
BEGIN
FOR i IN 1..10 LOOP
IF i != 10 THEN
select TO_CHAR(sysdate,'DD-MON-YYYYHH24:MI') || ',' into tmp from dual;
ELSE
select TO_CHAR(sysdate,'DD-MON-YYYYHH24:MI') into tmp from dual;
END IF;
res := concat(res,tmp);
END LOOP;
DBMS_OUTPUT.PUT_LINE(res);
END;
/
You should replace my query select with yours and of course the format of date you wanna get and replace comma with your desire character .
To make it working properly i wanna suggest you to create a cursor :
SET SERVEROUTPUT ON SIZE 1000000
DECLARE
res VARCHAR2(100);
tmp VARCHAR2(100);
cont NUMBER;
CURSOR C_1 IS
SELECT to_char(originating_timestamp,'your date format')
originating_timestamp
FROM sys.x$dbgalertext
WHERE message_text LIKE '%Starting up%'
and to_char(ORIGINATING_TIMESTAMP,'DD-MON-YY') = to_char(systimestamp,'DD-MON-YY');
BEGIN
cont := 0;
FOR C_row IN C_1 LOOP
IF cont != C_1%rowcount THEN
tmp := C_row.originating_timestamp ||',';
res := concat(res,tmp);
ELSE
tmp := C_row.originating_timestamp;
res := concat(res,tmp);
END IF;
cont := cont +1;
END LOOP;
DBMS_OUTPUT.PUT_LINE(res);
END;
/