ROracle (version 1.1-8)

fetch-methods: 從先前執行的查詢中擷取記錄

Description

此方法為對應一般函數的 直接實行.

Details

ROracle 實行僅擷取 n 記錄, 且若遺漏 n 則傳回所有記錄.

See Also

Oracle, dbConnect, dbSendQuery, dbGetQuery, dbClearResult, dbCommit, dbGetInfo, dbReadTable.

Examples

drv <- dbDriver("Oracle")
con <- dbConnect(drv, "scott", "tiger")
res <- dbSendQuery(con, "select * from emp")

# we now fetch the first 10 records from the resultSet into a data.frame
data1 <- fetch(res, n = 10)   
dim(data1)

dbHasCompleted(res)

# let's get all remaining records
data2 <- fetch(res, n = -1)