Assign the right values to the corresponding rows in my database table

if my table is like this in my database

Student    Staff      children
34         104         playing
34         104         playing      
34         104         rugby     
34         104         soccer        
34         104         playing

i want the value 34 to assign only to playing, if rugby or soccer it should be 0 or empty set and staff(1024) to assign only to rugby and soccer.i was wondering can i do this in my expression if i have =Fields!XXX.value. if not how can i write this in query.i query and display my tables as this.which is fine.and value of 34 and 104 a constant value.

my final table result i want to be like this

Student    Staff      children
34             0           playing
34             0           playing      
0             104         rugby     
0             104         soccer        
34           0            playing

thanks in advance