not enough information here.
If you want to put in 17 and show any record where any season would be equal to or greater than 17 that's one thing
If you want to put in 17 specifically in the SUMMER column that's another
realistically this should be in a properly normalized structure like
Code:
tblPerson
P_ID P_Description
1 Person A
2 Person B
3 Person C
tblSeason
S_ID S_Description
1 Summer
2 Autumn
3 Winter
4 Spring
tblData
D_ID P_ID S_ID D_Value
1 1 4 15
2 1 1 17
3 1 2 18
4 1 3 19
Then you can search all of your data regardless of season or value pretty easily