All:
I am using RSqlite and want to be able to update individual values in a
record, such as with this simple example:
library(RSQLite)
drv<-dbDriver("SQLite")
con<-dbConnect(drv,"test.db")
my.data<-data.frame(countries=c("US","UK","Canada","Australia","NewZealand"),vals=c(52,36,74,10,98))
dbWriteTable(con,"testtable",my.data)
q<-dbReadTable(con,"testtable")
q
countries vals
1 US 52
2 UK 36
3 Canada 74
4 Australia 10
5 NewZealand 98
So, say, I want to change the value for NewZealand to '21' from '98'
I've tried something like this:
sql<-"UPDATE testtable SET vals=21 WHERE countries='NewZealand'"
dbBeginTransaction(con)
dbGetPreparedQuery(con,sql) <========== I get an error here
dbCommit(con)
using a different example for an INSERT command using a data frame 'data',
this construct is accepted:
dbGetPreparedQuery(con,sql,bind.data=data)
What do I need to do differently to use the UPDATE command?
Regards,
Tom
--
Thomas E Adams
National Weather Service
Ohio River Forecast Center
1901 South State Route 134
Wilmington, OH 45177
EMAIL: thomas.ad...@noaa.gov
VOICE: 937-383-0528
FAX: 937-383-0033
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