How to select columns programmatically in a data.table?

Question

I have the following data.table (DT):

DT <- data.table(V1 = 1:3, V2 = 4:6, V3 = 7:9)

I would like to select a subset of the variables pr

Answer 1

Some more possibilities:

DT[, .SD, .SDcols = keep]
DT[, mget(keep)]