Title: | Database Management with R |
---|---|
Description: | Provides functions to manage databases: select, update, insert, and delete records, list tables, backup tables as CSV files, and import CSV files as tables. |
Authors: | Roberto Villegas-Diaz [aut, cre] , SPECIAL Research Group @ University of Reading [cph] |
Maintainer: | Roberto Villegas-Diaz <[email protected]> |
License: | GPL-3 |
Version: | 0.0.4 |
Built: | 2024-11-12 05:41:44 UTC |
Source: | https://github.com/special-uor/dabr |
Combine attributes from a vector of strings.
attributes(...)
attributes(...)
... |
Strings. |
Combined string with all the attributes.
dabr::attributes("A", "B", "C") dabr::attributes(c("A", "B", "C")) dabr::attributes(c("A", "B", "C"), "D", "E", "F")
dabr::attributes("A", "B", "C") dabr::attributes(c("A", "B", "C")) dabr::attributes(c("A", "B", "C"), "D", "E", "F")
Close connection to database
close_conn(conn, ...) ## S3 method for class 'MariaDBConnection' close_conn(conn, ...) ## Default S3 method: close_conn(conn, ...)
close_conn(conn, ...) ## S3 method for class 'MariaDBConnection' close_conn(conn, ...) ## Default S3 method: close_conn(conn, ...)
conn |
DB connection object. |
... |
Optional parameters. |
Other DB functions:
delete()
,
insert()
,
list_tables()
,
open_conn_mysql()
,
select_all()
,
select()
,
update()
## Not run: conn <- open_conn_mysql("sys", "root") close_conn(conn) ## End(Not run)
## Not run: conn <- open_conn_mysql("sys", "root") close_conn(conn) ## End(Not run)
DELETE
queryExecute DELETE
query
delete(conn, ...) ## S3 method for class 'MariaDBConnection' delete(conn, ..., quiet = FALSE)
delete(conn, ...) ## S3 method for class 'MariaDBConnection' delete(conn, ..., quiet = FALSE)
conn |
DB connection object. |
... |
|
quiet |
Boolean flag to hide status messages. |
Other DB functions:
close_conn()
,
insert()
,
list_tables()
,
open_conn_mysql()
,
select_all()
,
select()
,
update()
## Not run: conn <- open_conn_mysql("sys", "root") out <- delete(conn, "DELETE sys_config SET value = 1") close_conn(conn) ## End(Not run)
## Not run: conn <- open_conn_mysql("sys", "root") out <- delete(conn, "DELETE sys_config SET value = 1") close_conn(conn) ## End(Not run)
Get attributes of a table
get_attr(conn, ...) ## S3 method for class 'MariaDBConnection' get_attr(conn, name, ...)
get_attr(conn, ...) ## S3 method for class 'MariaDBConnection' get_attr(conn, name, ...)
conn |
DB connection object. |
... |
Optional parameters. |
name |
Table name. |
List of attributes for table name
.
INSERT
queryExecute INSERT
query
insert(conn, ...) ## S3 method for class 'MariaDBConnection' insert(conn, ..., quiet = FALSE)
insert(conn, ...) ## S3 method for class 'MariaDBConnection' insert(conn, ..., quiet = FALSE)
conn |
DB connection object. |
... |
|
quiet |
Boolean flag to hide status messages. |
Other DB functions:
close_conn()
,
delete()
,
list_tables()
,
open_conn_mysql()
,
select_all()
,
select()
,
update()
## Not run: conn <- open_conn_mysql("sys", "root") query <- paste0( "INSERT INTO sys_config (variable, value, set_time, set_by) VALUES ", "('test_var', 999, '", Sys.time(), "', NULL)" ) out <- insert(conn, query) close_conn(conn) ## End(Not run)
## Not run: conn <- open_conn_mysql("sys", "root") query <- paste0( "INSERT INTO sys_config (variable, value, set_time, set_by) VALUES ", "('test_var', 999, '", Sys.time(), "', NULL)" ) out <- insert(conn, query) close_conn(conn) ## End(Not run)
Verify if connection object is still valid, is connected to the database server.
is.connected(conn, ...) ## S3 method for class 'MariaDBConnection' is.connected(conn, ...)
is.connected(conn, ...) ## S3 method for class 'MariaDBConnection' is.connected(conn, ...)
conn |
DB connection object. |
... |
Optional parameters. |
Connection status.
List tables
list_tables(conn, ...) ## S3 method for class 'MariaDBConnection' list_tables(conn, quiet = FALSE, attr = TRUE, ...)
list_tables(conn, ...) ## S3 method for class 'MariaDBConnection' list_tables(conn, quiet = FALSE, attr = TRUE, ...)
conn |
DB connection object. |
... |
Optional parameters. |
quiet |
Boolean flag to hide status messages. |
attr |
Boolean flag to list the attributes of each table. |
If quiet = TRUE
returns a list with the tables' names. If
attr = TRUE
includes each attribute of the tables.
Other DB functions:
close_conn()
,
delete()
,
insert()
,
open_conn_mysql()
,
select_all()
,
select()
,
update()
Uses RMariaDB
to open a connection to a MySQL database.
open_conn_mysql( dbname, user = "root", password = NULL, host = "127.0.0.1", port = 3306 )
open_conn_mysql( dbname, user = "root", password = NULL, host = "127.0.0.1", port = 3306 )
dbname |
Database/Schema name. |
user |
Username of database owner. |
password |
Password (default: |
host |
Database host, it can be local (default) or remote. |
port |
Database port. |
MariaDBConnection
connection object.
Other DB functions:
close_conn()
,
delete()
,
insert()
,
list_tables()
,
select_all()
,
select()
,
update()
## Not run: conn <- open_conn_mysql("sys") ## End(Not run)
## Not run: conn <- open_conn_mysql("sys") ## End(Not run)
Add single quotes to string.
quote(str)
quote(str)
str |
String. |
String surrounded by single quotes
dabr::quote("A") dabr::quote("l'A")
dabr::quote("A") dabr::quote("l'A")
SELECT
queryExecute SELECT
query
select(conn, ...) ## S3 method for class 'MariaDBConnection' select(conn, ..., quiet = FALSE)
select(conn, ...) ## S3 method for class 'MariaDBConnection' select(conn, ..., quiet = FALSE)
conn |
DB connection object. |
... |
|
quiet |
Boolean flag to hide status messages. |
Data frame containing the selected records.
Other DB functions:
close_conn()
,
delete()
,
insert()
,
list_tables()
,
open_conn_mysql()
,
select_all()
,
update()
## Not run: conn <- open_conn_mysql("sys", "root") out <- select(conn, "SELECT variable, value FROM sys_config") close_conn(conn) ## End(Not run)
## Not run: conn <- open_conn_mysql("sys", "root") out <- select(conn, "SELECT variable, value FROM sys_config") close_conn(conn) ## End(Not run)
Select all the records inside a particular table, use the table
parameter.
select_all(conn, ...) ## S3 method for class 'MariaDBConnection' select_all(conn, table, quiet = FALSE, ...)
select_all(conn, ...) ## S3 method for class 'MariaDBConnection' select_all(conn, table, quiet = FALSE, ...)
conn |
|
... |
Optional parameters. |
table |
Name of the table. |
quiet |
Boolean flag to hide status messages. |
Data frame with records.
Other DB functions:
close_conn()
,
delete()
,
insert()
,
list_tables()
,
open_conn_mysql()
,
select()
,
update()
## Not run: conn <- dabr::open_conn_mysql("sys", "root") out <- dabr::select_all(conn, "sys_config") dabr::close_conn(conn) ## End(Not run)
## Not run: conn <- dabr::open_conn_mysql("sys", "root") out <- dabr::select_all(conn, "sys_config") dabr::close_conn(conn) ## End(Not run)
UPDATE
queryExecute UPDATE
query
update(conn, ...) ## S3 method for class 'MariaDBConnection' update(conn, ..., quiet = FALSE)
update(conn, ...) ## S3 method for class 'MariaDBConnection' update(conn, ..., quiet = FALSE)
conn |
DB connection object. |
... |
|
quiet |
Boolean flag to hide status messages. |
Other DB functions:
close_conn()
,
delete()
,
insert()
,
list_tables()
,
open_conn_mysql()
,
select_all()
,
select()
## Not run: conn <- open_conn_mysql("sys", "root") out <- update(conn, "UPDATE sys_config SET value = 1") close_conn(conn) ## End(Not run)
## Not run: conn <- open_conn_mysql("sys", "root") out <- update(conn, "UPDATE sys_config SET value = 1") close_conn(conn) ## End(Not run)