ROracle简介:
ROracle是R连接访问Oracle数据库一个DBI（Oracledatabase interface）接口，这是一个基于OCI的一个DBI兼容的Oracle驱动程序.
详细说明见：http://cran.r-project.org/web/packages/ROracle/ROracle.pdf
在Linux下安装ROracle比较简单，只需要用install.packages("ROracle")即可，在windows下要通过源码安装。
安装源文件下载地址：
http://cran.rstudio.com/src/contrib/ROracle_1.1-11.tar.gz
Win7中R安装ROracle方法：
设置环境变量：
setOCI_LIB64=E:\app\licz\product\11.2.0\dbhome_1\BIN
setOCI_INC=E:\app\licz\product\11.2.0\dbhome_1\OCI\include
set PATH=C:\ProgramFiles\R\R-3.1.1\bin\x64
注意：
如果安装的的R 64bit版本，那么oracle client也要是64位版本
安装步骤：
打开R
C:\Users\licz>R
>install.packages("ROracle",type = "source")
trying URL‘http://cran.rstudio.com/src/contrib/ROracle_1.1-11.tar.gz‘
Content type‘application/x-gzip‘ length 226769 bytes (221 Kb)
opened URL
downloaded 221 Kb
* installing *source* package‘ROracle‘ ...
** 成功将‘ROracle‘程序包解包并MD5和检查
cygwin warning:
MS-DOS style path detected:E:\app\licz\product\11.2.0\dbhome_2\BIN
Preferred POSIX equivalent is:/cygdrive/e/app/licz/product/11.2.0/dbhome_2/BIN
CYGWIN environment variable option"nodosfilewarning" turns off this warning.
Consult the user‘s guide for more detailsabout POSIX paths:
http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
Oracle Client Shared Library64-bit - 11.2.0.3.0 Operating in ORACLE_HOME environment.
found Oracle ClientE:\app\licz\product\11.2.0\dbhome_2\BIN
found Oracle Client includeE:\app\licz\product\11.2.0\dbhome_2\OCI\include
copying fromE:\app\licz\product\11.2.0\dbhome_2\OCI\include
** libs
警告: this package has a non-empty ‘configure.win‘ file,
so building only the mainarchitecture
cygwin warning:
MS-DOS style path detected:C:/PROGRA~1/R/R-31~1.1/etc/x64/Makeconf
Preferred POSIX equivalent is:/cygdrive/c/PROGRA~1/R/R-31~1.1/etc/x64/Makeconf
CYGWIN environment variable option"nodosfilewarning" turns off this warning.
Consult the user‘s guide for more detailsabout POSIX paths:
http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
gcc -m64-I"C:/PROGRA~1/R/R-31~1.1/include" -DNDEBUG -I./oci -I"d:/RCompile/CRANpkg/extralibs64/local/include" -O2 -Wall -std=gnu99 -mtune=core2 -c rodbi.c -o rodbi.o
gcc -m64-I"C:/PROGRA~1/R/R-31~1.1/include" -DNDEBUG -I./oci -I"d:/RCompile/CRANpkg/extralibs64/local/include" -O2 -Wall -std=gnu99 -mtune=core2 -c rooci.c -o rooci.o
In file included fromC:/PROGRA~1/R/R-31~1.1/include/R.h:50:0,
from rodbi.h:38,
from rooci.c:64:
C:/PROGRA~1/R/R-31~1.1/include/R_ext/RS.h:45:0:warning: "ERROR" redefined [enabled by default]
c:\rtools\gcc-4.6.3\bin\../lib/gcc/i686-w64-mingw32/4.6.3/../../../../i686-w64-mingw32/include/wingdi.h:70:0:note: this is the location of the previous definition
gcc -m64 -shared -s-static-libgcc -o ROracle.dll tmp.def rodbi.o rooci.o E:\app\licz\product\11.2.0\dbhome_2\BIN/oci.dll-Ld:/RCompile/CRANpkg/extralibs64/local/lib/x64-Ld:/RCompile/CRANpkg/extralibs64/local/lib -LC:/PROGRA~1/R/R-31~1.1/bin/x64-lR
installing to C:/ProgramFiles/R/R-3.1.1/library/ROracle/libs/x64
** R
** inst
** preparing package for lazyloading
Creating a generic function for‘summary‘ from package ‘base‘ in package ‘ROracle‘
** help
*** installing help indices
** building package indices
** testing if installed packagecan be loaded
* DONE (ROracle)
The downloaded source packagesare in
‘C:\Users\licz\AppData\Local\Temp\RtmpAjzrhP\downloaded_packages’
ROracle包使用：
>library(ROracle)
载入需要的程辑包：DBI
# 连接本地Oracle数据库
> con <- dbConnect(drv,username = "scott", password = "tiger")
> rs <- dbSendQuery(con,"select * from emp where deptno = 10")
> data <- fetch(rs)
> data
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
1 7782 CLARK MANAGER 7839 1981-06-092450 NA 10
2 7839 KING PRESIDENT NA 1981-11-175000 NA 10
3 7934 MILLER CLERK 7782 1982-01-23 1300 NA 10
> dim(data)
[1] 3 8
# 连接远程Oracle数据库
> drv <-dbDriver("Oracle")
> connect.string <-"(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.1.5.195)(PORT =1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = cwdb)))"
> con <- dbConnect(drv,username = "scott", password = "tiger",
+ dbname = connect.string)
> rs <- dbSendQuery(con,"select * from emp where deptno = 10")
> data <- fetch(rs)
> data
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
1 7782 CLARK MANAGER 7839 1981-06-092450 NA 10
2 7839 KING PRESIDENT NA 1981-11-175000 NA 10
3 7934 MILLER CLERK 7782 1982-01-23 1300 NA 10
> dim(data)
[1] 3 8