Hi all, I am trying to add a new column to each data frame of a list
with the results of adding the first two columns. I am trying to do this
with sqldf, but I have not been successful. I am using SQLite as my
driver. 

This is the code that I have: 
q10 = paste("ALTER TABLE getratingsmore[[1]] ADD newx AFTER x") 
q11 = paste("UPDATE TABLE getratingsmore[[1]] SET newx = x+shift") 
sqldf('q10, qll') 


For a reproducible example, I have the following code (which also was
not successful): 

dput(df) 
structure(list(a = c(5, 6, 6), b = c(20.2, 32.9, 0.99), cdo = c(0.2, 
32, 90.34)), .Names = c("a", "b", "cdo"), row.names = c(NA, -3L 
), class = "data.frame") 

q10 = paste("ALTER TABLE df ADD newx AFTER b") 
q11 = paste("UPDATE TABLE df SET newx = a+0.9") 
sqldf(q10, qll) 

R result: NULL 

Thank you. 

Irucka Embry 


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