Re: blanking out repeated columns in rows

On Tue, 7 May 2002 11:03:50 -0400
Sean McCorkle <mccorkle@avenger.bio.bnl.gov> wrote:

> but I (and my colleagues) would much rather see this, which draws 
> attention to the duplicates (or multiples) in the left column.
> 
>     tag             gb_id      pos     descrip
> 
> ACTATTTTTAGAGACCC NM_032685.1  307 hypothetical protein MGC13005 (MGC13005),
> AGAAAAAAAAAAAAAAA NM_019110.2   27 hypothetical protein P1 p373c6 (P1P373C6)
>                   NM_019110.2   27 hypothetical protein P1 p373c6 (P1P373C6)
> AGCCACCACGCCTGGTC NM_003693.1  260 acetyl LDL receptor; SREC=scavenger 
> AGCCACCGCGCCCGGCC NM_007081.1  486 RAB, member of RAS oncogene family-like 2B
>                   NM_013412.1  486 RAB, member of RAS oncogene family-like 2A
> AGCCACCGCGCCTGGCC NM_000651.2  229 complement component (3b/4b) receptor 1,
>                   NM_000573.2  229 complement component (3b/4b) receptor 1,
> ATCAAAAAAAAAAAAAA NM_079421.1   25 cyclin-dependent kinase inhibitor 2D


How about this method of appending sequences as unique indices?


First:
create temp sequence dna_rownum1;
create temp sequence dna_rownum2;

Secand:
SELECT setval('dna_rownum1', 1, false);   -- (1)
SELECT setval('dna_rownum2', 1, false);   -- (2)
SELECT (CASE WHEN t1.idx = t3.idx THEN t1.tag ELSE NULL END) AS tag,              t1.gb_id,              t1.pos,
     t1.descrip FROM  (SELECT *, nextval('dna_rownum1') AS idx                 FROM dna                ORDER BY idx
        ) AS t1,             (SELECT t2.tag, MIN(t2.idx) AS idx                 FROM (SELECT tag,
nextval('dna_rownum2')AS idx                                     FROM dna ORDER BY idx) AS t2               GROUP BY
t2.tag            ) AS t3WHERE t1.tag = t3.tagORDER BY t1.tag, t1.idx;  -- (3)
 

Note: (1) and (2) need to be executed at the same time, but (3) doesn't.        And CREATE TEMP SEQUENCE is practicable
in7.2 or later.
 


Regards,
Masaru Sugawara