Обсуждение: RE: Simple concatenation in select query

PostgreSQL has a string concatenation operator (see operators in the
manual):

SELECT last_name||', '||first_name FROM ...

Here's a ref: http://www.postgresql.org/docs/user/x2129.htm

Henry


-----Original Message-----
From: Sandis [mailto:sandis@mediaparks.lv]
Sent: Monday, July 31, 2000 2:48 PM
To: pgsql-sql@postgresql.org
Subject: [SQL] Simple concatenation in select query


Hello,

Sorry for the stupid posting, but..

There was a string concatenation function in MySQL:
SELECT CONCAT(first_name, " ", last_name) FROM table;
Is there a similar function in Postgres?

Certainly, it's possible to live without it, but i'd like to write as above,
doing concatenation in place.

Ok, it seems i found it now:
SELECT TEXTCAT(first_name, last_name) FROM table;
but it allows only 2 arguments, inserting " " or ' ' (space) causes
an error: attribute ' ' not found! Why postgres doesnt see it as string?

Ok, i got it, after all! It took > 30 min to write this query.  :(
SELECT textcat(textcat(first_name,text ' '),last_name) from table;

It kind of strange, but i found this function not in "user manual",
but doing "\df text".. There is some differences between function
descriptions in manual and those that \df returns..
Virtually \df returns much more functions than in manual,
and there is some differences in argument types.

May be someone knows a better, complete manual with ALL
function described and code samples?

sandis@mediaparks.lv
www.mediaparks.lv

----- Original Message -----

From: yogesh selukar

To: pgsql-sql@postgresql.org ; sandis@mediaparks.lv

Sent: Saturday, September 20, 2003 10:35 PM

Subject: Re: [SQL] Simple concatenation in select query

Hello Everybpdy,

     The concatination in select query u can write the query like this.

 

 select c.status||' this '||' is '||' the '||' status ' from course_master as c;

         This works fine

 

Regards

 

Yogesh

---

Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software