Comparison problem

2006-07-13 Thread Garaud Jean-Claude
Hello all I just suscribed to this list. I am a scientist working in Strasbourg (France) on problems related to gene expressions. I have a first question : I am comparing 2 tables, "gene-length" and "150genes". mysql> describe 150genes; +--+--+--+-+-

Re: Comparison problem

2006-07-13 Thread Garaud Jean-Claude
On Thursday 13 July 2006 14:19, Peter Brawley wrote: > Jean-Claude > > >But how to list all AC in Chimeric_Cluster_IDs _ABSENT_ from the > > gene_length table, this one for instance : > >mysql> select Chr_Name, Unigene_ID from gene_length where > >Unigene_ID='Mm.371574'; > >Any idea ? > > That is c

Re: Comparison problem

2006-07-18 Thread Garaud Jean-Claude
On Thursday 13 July 2006 16:52, Peter Brawley wrote: > Jean-Claude > > >I agree that LEFT JOIN is probably part of the solution. But the command > > you suggest do not work, perhaps because several Chimeric_Cluster_IDs and > > Unigene_ID are void or NULL. I want a list of AC from > > Chimeric_Clus