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https://github.com/davidski/database_connections
⚙️Demonstration code to connect R on MacOS to various database flavors.
https://github.com/davidski/database_connections
database macos mariadb mssql oracle postgresql rstats sql
Last synced: 22 days ago
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⚙️Demonstration code to connect R on MacOS to various database flavors.
- Host: GitHub
- URL: https://github.com/davidski/database_connections
- Owner: davidski
- Created: 2018-06-11T14:48:48.000Z (over 6 years ago)
- Default Branch: main
- Last Pushed: 2021-01-22T02:46:29.000Z (almost 4 years ago)
- Last Synced: 2024-10-12T21:27:53.122Z (29 days ago)
- Topics: database, macos, mariadb, mssql, oracle, postgresql, rstats, sql
- Homepage:
- Size: 8.79 KB
- Stars: 18
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.Rmd
Awesome Lists containing this project
- jimsghstars - davidski/database_connections - ⚙️Demonstration code to connect R on MacOS to various database flavors. (Others)
README
---
title: "Database Connections"
output: github_document
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```
## Connecting to Databases from R
> Patterned after http://db.rstudio.com/
This walkthrough is for MacOS X users. Windows users may be able to achieve
similar results through the use of [Chocolatey](https://chocolatey.org/), though
research into the specific packages under Windows that match what homebrew installs is
required.
These connectivity examples use DBI-compatible interfaces. DBI is a database
interface specification that allows any compliant tool to communicate with
databases without knowledge of the underlying database technology. Using
DBI tooling allows both direct SQL queries through raw connections as well as
tight integration with the tidyverse through the spiffy `dbplyr` package.
Database drivers must be written with DBI interfaces. Both native drivers and the
generic (DBI-compliant) odbc connections are demonstrated. For Oracle and MS
SQL Server, odbc is the only (free) connectivity option.
If you are only connecting to a single database type, the driver you choose is
largely a matter of personal preference. If connecting to multiple different
database types, using odbc will provide a more consistent interface.
Connections made using odbc will appear in the connections tab of the RStudio
IDE.
## Install ODBC and Database Drivers
```{shell odbc_install, eval=FALSE}
# install base odbc framework
brew install unixodbc
# Microsoft SQL Server, enabling it for use with odbc
brew install freetds --with-unixodbc
# PostgreSQL ODBC Drivers
brew install psqlodbc
# Maria/MySQL ODBC drivers
brew install mariadb-connector-c
brew install mariadb-connector-odbc
# SQLite ODBC Drivers
brew install sqliteodbc
```
### Oracle Client Install
The Oracle client install is complicated. `r emo::ji("frowning")`
Download the Basic client and the ODBC drivers via
http://www.oracle.com/technetwork/topics/intel-macsoft-096467.html. A (free)
Oracle account is required. Place both ZIP files in your ~/Downloads directory.
```{bash, eval=FALSE}
sudo unzip -o ~/Downloads/instantclient-basic-macos.x64-12.2.0.1.0-2.zip -d /opt/ora12
sudo unzip -o ~/Downloads/instantclient-odbc-macos.x64-12.2.0.1.0-2.zip -d /opt/ora12
# patch the Oracle ODBC install script to fix an incorrectly specified library
# extension (.so -> .dylib)
sudo patch ./oracle_odbc_update.patch /opt/ora12/instantclient_12_2/odbc_update_ini.sh > patch.diff
sudo /opt/ora12/instantclient_12_2/odbc_update_ini.sh /usr/local
ln -s `pwd`/libclntsh.dylib.12.1 /usr/local/lib
ln -s `pwd`/libclntshcore.dylib.12.1 /usr/local/lib
```
### Configure ODBC Drivers
Set `/usr/local/etc/odbcinst.ini` to the following to allow easy reference
to the database drivers by name rather than by full file path:
```
[SQLite]
Driver = /usr/local/lib/libsqlite3odbc.dylib
[PostgreSQL]
Driver = /usr/local/lib/psqlodbcw.so
[MySQL]
Driver = /usr/local/lib/libmysqlclient.dylib
[MariaSQL]
Driver = /usr/local/lib/libmaodbc.dylib
[SQL Server]
Driver = /usr/local/lib/libtdsodbc.so
[Oracle 12c]
Description = Oracle ODBC driver for Oracle 12c
Driver = /usr/local/lib/libsqora.dylib.12.2
Setup =
FileUsage =
CPTimeout =
CPReuse =
```
## Configure R packages
Install all the relevant R packages. We use DBI as the primary database
interface, with odbc for ODBC connectivity. Native drivers for PostgreSQL,
MariaDB/MySQL, and SQLite are also installed. In production, you can
choose either native or ODBC drivers as you see fit.
```{r, eval=FALSE}
install.packages("DBI") # DBI framework
install.packages("odbc") # odbc framework
# Native drivers
install.packages("RPostgres")
install.packages("RMariaDB") # covers MariaDB and MySQL
install.packages("RSQLite")
```