this is my data table:
A B
9 1300
10 1300
11 1300
12 500
13 900
14 1300
15 1300
16 1300
And I have three variables: M=10, N=11, and P=13
I want to select rows where A=M and A=N, and A=P.
I wrote this line, but it only selects A=M.
dt << Select Where (A==M& A==N & A==P) ;
do you have any suggestions?