RSQLite (version 1.0.0)

dbWriteTable,SQLiteConnection,character,data.frame-method: Write a local data frame or file to the database.

Description

Write a local data frame or file to the database.

Usage

# S4 method for SQLiteConnection,character,data.frame
dbWriteTable(conn, name,
  value, row.names = NA, overwrite = FALSE, append = FALSE,
  field.types = NULL)
# S4 method for SQLiteConnection,character,character
dbWriteTable(conn, name, value,
  field.types = NULL, overwrite = FALSE, append = FALSE, header = TRUE,
  colClasses = NA, row.names = FALSE, nrows = 50, sep = ",",
  eol = "\n", skip = 0)

Arguments

conn

a '>SQLiteConnection object, produced by dbConnect

name

a character string specifying a table name. SQLite table names are not case sensitive, e.g., table names ABC and abc are considered equal.

value

a data.frame (or coercible to data.frame) object or a file name (character). In the first case, the data.frame is written to a temporary file and then imported to SQLite; when value is a character, it is interpreted as a file name and its contents imported to SQLite.

row.names

A logical specifying whether the row.names should be output to the output DBMS table; if TRUE, an extra field whose name will be whatever the R identifier "row.names" maps to the DBMS (see make.db.names). If NA will add rows names if they are characters, otherwise will ignore.

overwrite

a logical specifying whether to overwrite an existing table or not. Its default is FALSE. (See the BUGS section below)

append

a logical specifying whether to append to an existing table in the DBMS. Its default is FALSE.

field.types

character vector of named SQL field types where the names are the names of new table's columns. If missing, types inferred with dbDataType).

header

is a logical indicating whether the first data line (but see skip) has a header or not. If missing, it value is determined following read.table convention, namely, it is set to TRUE if and only if the first row has one fewer field that the number of columns.

colClasses

Character vector of R type names, used to override defaults when imputing classes from on-disk file.

nrows

Number of rows to read to determine types.

sep

The field separator, defaults to ','.

eol

The end-of-line delimiter, defaults to '\n'.

skip

number of lines to skip before reading the data. Defaults to 0.

Examples

# NOT RUN {
con <- dbConnect(SQLite())
dbWriteTable(con, "mtcars", mtcars)
dbReadTable(con, "mtcars")

# A zero row data frame just creates a table definition.
dbWriteTable(con, "mtcars2", mtcars[0, ])
dbReadTable(con, "mtcars2")

dbDisconnect(con)
# }