RJDBC - Allows the use of JDBC to access databases from R
RODBC provides an ODBC database interface for R
"Rodbc takes longer than rjdbc"
from question "RODBC posixct date field makes query very slow"
"Now the speed of sql server interaction with r has affected because rjdbc is slower than rodbc but its not too bad"
from question "Long/bigint/decimal equivalent datatype in R"
"Rjdbc may also be a more stable option in the linux environment especially now that the fetch code has been re-written in java as of development release 0.2-0 on r-forge its performance is on par with if not better than rodbc"
from question "RODBC returning 0 values"