sqlquery in R does not return all rows from query

问题

I am executing below commands in R:

dbhandle <- odbcDriverConnect('driver={SQL Server};server=serveripaddress;database=DBName;uid=sa;pwd=pwd;')

FactActivity <- sqlQuery(dbhandle, "SELECT DimCourseID,DimPatientID FROM DWH.FactActivity", as.is=TRUE)

nrow(FactActivity)

In my database I have total 238634 rows but in R I am getting total rows = 237652.

This is happening for all tables (I tried it for three tables).

Any idea what am I missing which is reducing no of rows in my resultset in R?

回答1:

I had the same problem, couldn't solve it, eventually switched to using RJDBC with a Java driver to get around it.

来源：https://stackoverflow.com/questions/43200384/sqlquery-in-r-does-not-return-all-rows-from-query