SELECT *
FROM students
ORDER BY IF(height >= 150, 1,0 ) DESC,
IF(height >= 150, name, '') ASC,
name DESC
prøveoutput
+------+--------+
| name | height |
+------+--------+
| a | 189 |
| m | 666 |
| thy | 166 |
| yyy | 1277 |
| zz | 101 |
| swq | 122 |
| n | 111 |
| g | 145 |
+------+--------+