mysql> select count(account) n,avg(dif) dist,account from (select T2.account,abs(T1.value-T2.value) dif from rating T1,rating T2 where T1.account='Toba' and T2.account<>'Toba' and T1.apparel=T2.apparel and (abs(T1.value-T2.value) < 3)) T group by account order by N desc,dist asc;
+---+--------+-----------+
| n | dist   | account   |
+---+--------+-----------+
| 3 | 0.6667 | calenlass | 
| 2 | 0.0000 | David     | 
| 2 | 0.5000 | Witoki    | 
| 1 | 0.0000 | croy      | 
| 1 | 0.0000 | kastein   | 
| 1 | 0.0000 | Tigrael   | 
+---+--------+-----------+
6 rows in set (0.00 sec)

mysql> select count(account) n,avg(dif) dist,account from (select T2.account,abs(T1.value-T2.value) dif from rating T1,rating T2 where T1.account='David' and T2.account<>'David' and T1.apparel=T2.apparel and (abs(T1.value-T2.value) < 3)) T group by account order by N desc,dist asc;
+---+--------+-----------+
| n | dist   | account   |
+---+--------+-----------+
| 2 | 0.0000 | Toba      | 
| 1 | 0.0000 | calenlass | 
| 1 | 0.0000 | kastein   | 
| 1 | 0.0000 | croy      | 
| 1 | 0.0000 | Tigrael   | 
| 1 | 0.0000 | Witoki    | 
+---+--------+-----------+
6 rows in set (0.01 sec)