anchor.diff:  | validation_status | set('cluster','freq','submitter','doublehit','hapmap','failed') | YES  |     | NULL    |                |
   | ancestral_allele  | text                                                            | YES  |     | NULL    |                |
   +-------------------+-----------------------------------------------------------------+------+-----+---------+----------------+
  -5 rows in set (0.04 sec)
  -
  -mysql> desc allele;
  -+--------------+------------------+------+-----+---------+----------------+
  -| Field        | Type             | Null | Key | Default | Extra          |
  -+--------------+------------------+------+-----+---------+----------------+
  -| allele_id    | int(10) unsigned |      | PRI | NULL    | auto_increment |
  -| variation_id | int(10) unsigned |      | MUL | 0       |                |
  -| allele       | varchar(255)     | YES  |     | NULL    |                |
  -| frequency    | float            | YES  |     | NULL    |                |
  -| sample_id    | int(10) unsigned | YES  |     | NULL    |                |
  -+--------------+------------------+------+-----+---------+----------------+
  -5 rows in set (0.04 sec)
  -
  -mysql> select * from variation limit 10;
  +
   +--------------+-----------+------+------------------------+------------------+
   | variation_id | source_id | name | validation_status      | ancestral_allele |
   +--------------+-----------+------+------------------------+------------------+
  
positive.code: |            9 |         1 | rs11 | NULL                   | C                |
  |           10 |         1 | rs12 | submitter              | A                |
  +--------------+-----------+------+------------------------+------------------+
  10 rows in set (0.05 sec)
  
  mysql> select * from allele limit 10;
  +-----------+--------------+--------+-----------+-----------+
  | allele_id | variation_id | allele | frequency | sample_id |
  +-----------+--------------+--------+-----------+-----------+
  
negative.code:   "Returns SNPs located in that interval."
    (let (query "select seq_region_id, seq_region_start, seq_region_end, seq_region_strand, variation_id, variation_name, consequence_type from variation_feature join homo_sapiens_core_47_36i.seq_region using (seq_region_id) where ....)
      ))
  ||#
  