> con <- dbConnect(dbDriver("MySQL"), dbname = "test") ## 列出数据库中表 > dbListTables(con) ## 把一个数据框导入到数据库,删除任何已经存在的拷贝 > data(USArrests) > dbWriteTable(con, "arrests", USArrests, overwrite = TRUE) TRUE > dbListTables(con) [1] "arrests" ## 获得整个表...
连接到Oracle数据库:使用ROracle或RJDBC包中的函数,根据您的数据库连接信息建立与Oracle数据库的连接。这些函数通常包括dbConnect()或dbDriver()。 执行查询:使用R语言的SQL查询功能,编写查询语句以检索LOB字段的数据。查询语句的语法与标准的SQL查询相同。例如,可以使用dbGetQuery()函数执行查询并将结果存储在一个变量...
m = dbDriver("SQLite"); # The name of the database file dbfile = "regression.db"; # Create a connection to the database con = dbConnect(m, dbname = dbfile); # Write the data in R into database if(dbExistsTable(con, "regdata")) dbRemoveTable(con, "regdata"); dbWriteTable(...
library(RPostgreSQL) # 创建数据库连接 drv <- dbDriver("PostgreSQL") con <- dbConnect(drv, dbname="your_database", host="your_host", port="your_port", user="your_username", password="your_password") # 准备要插入的数据 new_record <- data.frame(column1="value1", column2="value2"...
# 安装并加载RPostgreSQL包 install.packages("RPostgreSQL") library(RPostgreSQL) # 连接到PostgreSQL数据库 drv <- dbDriver("PostgreSQL") con <- dbConnect(drv, dbname = "your_dbname", host = "your_host", port = "your_port", user = "your_user", password = "your_password") # 准备要插...
data <- read.xlsx(file.choose()) 1. 2. 3. 导入R语言内部数据集:data() 连接Oracle • library(DBI) library(ROracle) drv <-dbDriver("Oracle") connect.tns <-"(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = ***)(PORT =***)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NA...
library(RPostgreSQL) drv <- dbDriver("PostgreSQL") db <- dbConnect(drv, dbname="ncaa", user="YOUR USER NAME", password="YOUR PASSWORD") q <- "SELECT * FROM game_scores;"data<- dbGetQuery(db, q) head(data) #id school game_date spread school_score opponent opp_score was_home#1 ...
drv <-dbDriver("Oracle") con <- dbConnect(drv,username = "scott", password = "tiger") ## 运行一个SQL语句 rs <- dbSendQuery(con,"select * from emp where deptno = 10") ## 读取一个结果集到数据框 data <- fetch(rs) ## extractall rows ...
drv <- dbDriver("PostgreSQL") db <- dbConnect(drv, dbname="ncaa", user="YOUR USER NAME", password="YOUR PASSWORD") q <- "SELECT * FROM game_scores;" data <- dbGetQuery(db, q) head(data) #id school game_date spread school_score opponent opp...
R简单的使用使用霍尔特指数平滑法预测数据 - 1、连接oracle数据库,提取所需数据library(DBI) library(ROracle) library(forecast) drv=dbDriver('Oracle') conn=dbConnect(drv,'trff_app','trff_a...