How to Concatenate More Than Two Columns in Plsql Developer

how to concatenate more than two columns in plsql developer?

Concat only takes two arguments.
See: http://docs.oracle.com/cd/B19306_01/server.102/b14200/functions026.htm

Use the concatenation operator:

select column1 || column2 || column3 ...

How to concat two column with '-' seperator in PL/SQL

Do it with two concats:

select concat(concat(amt, '-'), endamt) as amount from mstcatrule;

concat(amt,'-') concatenates the amt with the dash and the resulting string is concatenated with endamt.

Concatenate values from multiple columns in Oracle

Use below query

   select col1,rtrim( col2||','||col3||','||col4||','||col5,' ,') as col2  from table_name

Concatenate across columns and rows using group and listagg in Oracle SQL

Use the following query where you will directly get concatenated column values:

SELECT
    "GROUP",
    LISTAGG(VAL_1 || VAL_2 || VAL_3)  
        WITHIN GROUP(ORDER BY VAL_1) AS "TEXT"
FROM DATA
GROUP BY "GROUP";

Note: Do not use oracle reserved keywords as the column names. Here GROUP is the oracle reserved keyword.

Cheers!!

Any Oracle built-in function to concat multiple fields in a particular order?

No. You can do this with least() and greatest() and case:

select least(col1, col2, col3) ||
       (case when col1 not in (least(col1, col2, col3), greatest(col1, col2, col3)) then col1
             when col2 not in (least(col1, col2, col3), greatest(col1, col2, col3)) then col2
             else col3
        end) ||
       greatest(col1, col2, col3)

CONCAT in sql developer

Use ANSI SQL's || instead to concat:

SELECT FIRST_NAME || ',' || LAST_NAME as full_name FROM EMPLOYEES;

(CONCAT() function takes two arguments only.)

Merge multiple columns values in one column in one row Oracle SQL

You don't need a listagg for this, you can just concat all the columns as follows -

select colnum, col1||','||col2||','||col3 as col1234
from columnMerger

COLNUM  COL1234
1       a,b,c

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