Create a connection object to an SQLite DBMS

Description

These methods are straight-forward implementations of the corresponding generic functions.

Methods

drv

an object of class SQLiteDriver, or the character string "SQLite" or an SQLiteConnection.

conn

an SQLiteConnection object as produced by dbConnect.

...

In the case of SQLite all you need is dbname, which should refer to a file name.

Side Effects

A connection between R/S-Plus and the embeddable SQLite server is established. Note that since the SQLite is embedded in R/S-Plus, connections are not too resource hungry.

SQLite connections only require the file name where the SQLite database reside. For details see SQLite.

References

See the Database Interface definition document DBI.pdf in the base directory of this package or http://developer.r-project.org/db.

See Also

SQLite, dbConnect, dbSendQuery, dbGetQuery, fetch, dbCommit, dbGetInfo, dbReadTable.

Examples

# create an SQLite instance and create one connection.
drv <- dbDriver("SQLite")

# open the connection using user, passsword, etc., as
con <- dbConnect(drv, dbname = "sqlite.db")

# Run an SQL statement by creating first a resultSet object
rs <- dbSendQuery(con, statement = paste(
                      "SELECT w.laser_id, w.wavelength, p.cut_off",
                      "FROM WL w, PURGE P", 
                      "WHERE w.laser_id = p.laser_id", 
                      "SORT BY w.laser_id")
# we now fetch records from the resultSet into a data.frame
data <- fetch(rs, n = -1)   # extract all rows
dim(data)