mysql select concat selection: mysql select concat selection

mysql select concat selection

Hello:
I have already posted my question at:
http://www.experts-exchange.com/Database/MySQL/Q_24340456.html
I thought I found the solution there but there is a problem:

solution (that does not woirk correctly)
SELECT CONCAT('pix1/', LEFT(username,1),'/',LEFT(username,2), '/', username , '-1.jpg')

It makes a kind of recurrent selection that make the result growing all the rime !

here is my request again

I have in my database users, fields name username who contains for instance the value dialogoo
I need to write a simple select function that selects:
pix1/d/di/dialogoo-1.jpg

pix1 is FIXED
d is the first letter
di are the first 2 letters
-1.jpg is fixed

so it it something like
SELECT "pix1/"+{firstLetter(username)+"/"+{first2Letters(username)}+"/"+{username}+"-1.jpg"
Any clue ?

regards

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What do you mean by keep on growing.

Whats the result are you getting and what is your expected result?

I am getting correct result for the query suggested here.

mysql> create table inscrits(username varchar(1000));
Query OK, 0 rows affected (0.06 sec)
 
mysql> insert into inscrits values('bel01');
Query OK, 1 row affected (0.00 sec)
 
mysql> insert into inscrits values('CcC01');
Query OK, 1 row affected (0.00 sec)
 
mysql> insert into inscrits values('CcC02');
Query OK, 1 row affected (0.00 sec)
 
mysql> insert into inscrits values('CcF01');
Query OK, 1 row affected (0.00 sec)
 
mysql> insert into inscrits values('CcF02');
Query OK, 1 row affected (0.00 sec)
 
mysql> insert into inscrits values('CcH01');
Query OK, 1 row affected (0.00 sec)
 
mysql>
mysql> SELECT username,CONCAT('pix1/', LEFT(username,1),'/',LEFT(username,2), '/
', TRIM(username) , '-1.jpg') as complete_username
    ->   from inscrits;
+----------+-----------------------+
| username | complete_username     |
+----------+-----------------------+
| bel01    | pix1/b/be/bel01-1.jpg |
| CcC01    | pix1/C/Cc/CcC01-1.jpg |
| CcC02    | pix1/C/Cc/CcC02-1.jpg |
| CcF01    | pix1/C/Cc/CcF01-1.jpg |
| CcF02    | pix1/C/Cc/CcF02-1.jpg |
| CcH01    | pix1/C/Cc/CcH01-1.jpg |
+----------+-----------------------+
6 rows in set (0.00 sec)

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SELECT username,CONCAT('pix1/', LEFT(username,1),'/',LEFT(username,2), '/', TRIM(username) , '-1.jpg') as complete_username FROM inscrits GROUP BY username;

SELECT username,CONCAT('pix1/',username) as complete_username FROM inscrits; SELECT username,CONCAT('pix1/',LEFT(username,1)) as complete_username FROM inscrits; SELECT username,CONCAT('pix1/',LEFT(username,1),'/') as complete_username FROM inscrits; SELECT username,CONCAT('pix1/',LEFT(username,1),'/',LEFT(username,2)) as complete_username FROM inscrits; SELECT username,CONCAT('pix1/',LEFT(username,1),'/',LEFT(username,2),'/') as complete_username FROM inscrits; SELECT username,CONCAT('pix1/',LEFT(username,1),'/',LEFT(username,2),'/',TRIM(username)) as complete_username FROM inscrits; SELECT username,CONCAT('pix1/',LEFT(username,1),'/',LEFT(username,2),'/',TRIM(username),'-1.jpg') as complete_username FROM inscrits;

Question

mysql select concat selection

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