When I was working on Mehmet’s miRNA data (from Affymetrix miRNA-3.0 array), I encountered an error. It turns out that I need to install new library to read in .cdf platform.

source("http://bioconductor.org/biocLite.R")
biocLite("pd.mirna.3.0")

With miRBase mysql local set up, I can easily search for miRs. i.e.

 select * from mirna_mature where mature_name like "mmu-miR-15b%" ; 
+-------------+----------------+--------------------+--------------+--------------+-----------------------------------------------------------------------------------+------------+
| auto_mature | mature_name    | previous_mature_id | mature_acc   | evidence     | experiment                                                                        | similarity |
+-------------+----------------+--------------------+--------------+--------------+-----------------------------------------------------------------------------------+------------+
|       75243 | mmu-miR-15b-3p | mmu-miR-15b*       | MIMAT0004521 | experimental | cloned [17604727], Solexa [20215419,20413612]                                     |            | 
|       75242 | mmu-miR-15b-5p | mmu-miR-15b        | MIMAT0000124 | experimental | cloned [12007417,12919684,15538371,16766679,17604727], Solexa [20215419,20413612] |            | 
+-------------+----------------+--------------------+--------------+--------------+-----------------------------------------------------------------------------------+------------+