Question

I have a table that looks like this

Group  Recipe    Priority
0       A         400
0       A         200
0       B         500
0       B         100
1       C         300
1       C         300
1       D         600

Importance is “Group” > “Priority” > “Recipe”

Group 0 has to go first.
Within Group 0, Priority 500 has to go first (since it has higher priority), but for the efficiency, all the recipe has to go first.

After sorting,
it should look like this

Group  Recipe    Priority
0       B         500
0       B         100
0       A         400
0       A         200
1       D         600
1       C         300
1       C         300

I have tried all different ways to do ‘order by’ but cannot find a correct way.

thank you for the help

Answer 1

The problem is subtle. You want to order not by priority, but by the maximum priority for a given group/recipe combination. That is, you want to keep all the recipes together based on this max priority.

The following does this:

select t.Group, t.Recipe, t.Priority,
       max(priority) over (partition by t.group, t.recipe) as maxpriority
from tablename t
order by t.Group asc, 4 desc, t.Recipe, priority desc