Postgres concat all

Question

I need connect all columns (unknown columns) from every rows to one string

I want do sth like this:

select concat(*) from table;

The problem is that the function concat doesn't take parameter "*"

Anyone can help me?

Example:

Table

GID | Name
----------
1   | nameA
2   | nameB
3   | nameC

I need on output:

1nameA
2nameB
3nameC

Answer 1

select rtrim(ltrim(replace(tablename::text, ',', ''), '('), ')') from tablename;

Answer 2

I would propose two options. They both work using table_row to text technique.

1. Quick and dirty:

   select r::text from some_table AS r
   

   Sample output:

   (289,310,,2010-09-10,6,0,1,6,0,30514,6,882,8,4,1,7,2,2,3,1,2,2,2,1,2,2,2,,1,51,0,0,0,0,0,1386,1,1,,6,,0,,,010100002082080000B3EA73156DA25C411E85EB61CB155641)
   

2. Quick with a possibility to manipulate the data:

   select translate(string_to_array(r::text, ',')::text, '()', '')::text[] from some_table AS r
   

   which returns an actual array of text (text[]) on which any array function can be applied :)
   Sample output (note starting and ending parenthesis type):

   {289,310,"",2010-09-10,6,0,1,6,0,30514,6,882,8,4,1,7,2,2,3,1,2,2,2,1,2,2,2,"",1,51,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1386,1,1,"",6,"",0,"","",010100002082080000B3EA73156DA25C411E85EB61CB155641}
   

Using the second approach and array_to_string(array, delimiter) function you can concatenate all column textual representations into one string. Just pick a delimiter (e.g. ',', '|' or even ''). For example using '|' you end up with a query:

select array_to_string(translate(string_to_array(r::text, ',')::text, '()', '')::text[], '|') from some_table AS r

with sample output:

289|310||2010-09-10|6|0|1|6|0|30514|6|882|8|4|1|7|2|2|3|1|2|2|2|1|2|2|2||1|51|0|0|0|0|0|0|0|1|0|0|0|0|0|0|0|2|0|0|0|0|0|0|0|1|0|0|0|0|0|0|0|1|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1386|1|1||6||0|||010100002082080000B3EA73156DA25C411E85EB61CB155641

Hope that helps :)