Hello List,
I wrote a script below to compare the difference of data frames structure (and
will do something else). First of all I save the file list in a data frame ora,
then I use for loop to 1. load the data from two resource, 2. generate data
structure into two data frames, 3.do the comparesion of the two data frames of
data structure and put it into a data frame, 4. remove the useless data frames
for next loop
for (j in 1:nrow(ora))
{
mycol <- ora[j,"fname"]
#--------------------work on csv------------
mycsv <- paste0(mycol,".csv")
rdcsv <- noquote(paste0("w:/project/_Joe.B/Oracle/data/", mycsv))
rr <- read.csv(rdcsv)
#--------------------work on SS ------------
myss <- paste0("gemd.", mycol)
rdss <- paste0('select * from ',myss)
ss <- dbGetQuery(con, rdss)
#--------------------compare DF structure ------------
str_rr <- as.data.frame(summary.default(rr))
str_ss <- as.data.frame(summary.default(ss))
sdif_[j] <- sqldf('select * from str_rr except select * from str_ss')
#---------remove data frame from memory--------------
rm(rr)
rm(ss)
rm(str_rr)
rm(str_ss)
}
In the step 3, I want to use ora$fname in the loop to assign a data frame name.
So, I will look the output later. But sdif_[j] doesn't work for this. Can
someone help me to fix this part?
Thanks,
Kai
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