similar to: RSQLite

Dear r helpers, At first, I apologize for raising a query which seems to be a stupid interpretation on my part. I am trying to learn SQLite. Following is an example given in the RSQLite.zip file (Page # 4) drv <- dbDriver("SQLite") tfile <- tempfile() con <- dbConnect(drv, dbname = tfile) data(USArrests) dbWriteTable(con, "arrests", USArrests) On the similar

Dear list, I want to insert a recorde into a SQLite table by dbGetQuery(), but there is a problem when the value contains quotation mark. > dd<-data.frame(txt=c("having both ' and \" in character.","OK")) > library(RSQLite) Loading required package: DBI > con<-dbConnect(dbDriver("SQLite"),":memory:") >

Hi, I'm experimenting with using (R)SQLite to do data management. Here are two little problems that I've encountered: 1. The presence of ',' in string values causes trouble since ',' is also the delimiter used in the SQL statement. 2. A newline '\n' line attached to the last string value of each row. Some examples: > library (RSQLite) Loading required

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))

What am I doing wrong, or is the \r that I'm getting in the example below a bug? > a <- (1:10) > b <- (LETTERS[1:10]) > df <- as.data.frame(cbind(a, b)) > > df a b 1 1 A 2 2 B 3 3 C 4 4 D 5 5 E 6 6 F 7 7 G 8 8 H 9 9 I 10 10 J > library(RSQLite) > drv <- dbDriver("SQLite") > con <- dbConnect(drv, dbname = "Test")

What am I doing wrong, or is the \r that I'm getting in the example below a bug? > a <- (1:10) > b <- (LETTERS[1:10]) > df <- as.data.frame(cbind(a, b)) > > df a b 1 1 A 2 2 B 3 3 C 4 4 D 5 5 E 6 6 F 7 7 G 8 8 H 9 9 I 10 10 J > library(RSQLite) > drv <- dbDriver("SQLite") > con <- dbConnect(drv, dbname = "Test")

I'd like to search for a particular string in an SQLite database using RSQLite, but I'm running into problems constructing the query properly, because of embedded quotes and parens in the string. Is there a function that escapes these for me, or some other fixup that would let me do the queries below? In the real situation I don't have control over what strings get searched for.

ronggui wrote: > If i am familiar with > database software, using database (and R) is the best choice,but > convert the file into database format is not an easy job for me. Good working knowledge of a DBMS is almost invaluable when it comes to working with very large data sets. In addition, learning SQL is piece of cake compared to learning R. On top of that, knowledge of another (SQL)

Hi there, I had an error when using RSQLite. My code and the error message are the following: > dbGetQuery(sql.dispersion, + "create table monthly_data_temp as + select a.*, b.industry + from monthly_data as a left join + siccd_industry_ff49 as b + on a.siccd = b.siccd + order by permno, date") Error

How can I change SQLite cache size for R session? SQLite cache size can be set by a pragma, for the duration of the session - or by default. .pragma cache_size .pragma default_cache_size my questions are about RSQLite, version 0.4, running on Windows: - what is the cache size set to when SQLite is invoked from R? - if the page_size is set to 4096 what will be the cache size in bytes

Dear all, I'm trying to import a csv file into sqlite3 and from there into R. Everything looks fine exepct that R outputs the character values in an odd fashion: they are shown as "\"CHARACTER\"" instead of "CHARACTER", but only if I show the character variable as a vector. Does someone know why this happens? Below is a sample code. The first part is written in

Hi All, I am trying to make write a table in RSQLite. And I get the error mentioned below mat<-as.data.frame(matrix(rnorm(n=244000000),nrow=244000,ncol=1000)) > dbWriteTable(con, "array", mat) [1] FALSE *Warning message: In value[[3]](cond) : RS-DBI driver: (error in statement: too many SQL variables)* Can someone please tell me what is maximum size of a table( max number of

A new version of RSQLite has been pushed to CRAN. In this version... * Further integration of the manifest type system available since SQLite 3. We now obtain the column type from the DB instead of pulling everything across as a character vector and calling type.convert. This should improve performance and provide a more reliable interface to build on top of. Note, however, that since

A new version of RSQLite has been pushed to CRAN. In this version... * Further integration of the manifest type system available since SQLite 3. We now obtain the column type from the DB instead of pulling everything across as a character vector and calling type.convert. This should improve performance and provide a more reliable interface to build on top of. Note, however, that since

RSQLite.extfuns provides SQLite extension functions for use with RSQLite. The package is a wrapper of extension functions written by Liam Healy and made available through the SQLite website (http://www.sqlite.org/contrib). You can make the extension functions available on a per db connection basis like this: library("RSQLite.extfuns") db <- dbConnect(SQLite(), dbname =

RSQLite.extfuns provides SQLite extension functions for use with RSQLite. The package is a wrapper of extension functions written by Liam Healy and made available through the SQLite website (http://www.sqlite.org/contrib). You can make the extension functions available on a per db connection basis like this: library("RSQLite.extfuns") db <- dbConnect(SQLite(), dbname =

Estimados Anteriormente usé sin problemas Rsqlite, pero encuentro un error, comparto el código ¿alguno tiene idea sobre que puede llegar a ser? library(RSQLite) con <- dbConnect('SQLite', dbname='/Users/Javier_2/Desktop/SQLiteJavier.db') // o ? en lugar de ? , el error persiste > con <- dbConnect("SQLite",

Hello, I am trying to import data from an SQLite database to R. Unfortunately, I seem to get wrong data when I try to import very large numbers. For example: I look at the database via SQLiteStudio(v.1.1.3) and I see the following values: OrderID Day TimeToclose 1 2009-11-25 29467907000 2 2009-11-25 29467907000 3 2009-11-25 29467907000 Now I run this R Code: >

Hello Simon, Hello everyone, I have a problem with retrieving database-queries chunkwise. In my query (Postgresql-Database, Postgres-Version 9.1) dbHasCompleted seems to always return TRUE. dbGetQuery works for smaller tables, but not for the whole query, since then a Heap-Overflow-Error will occur (and a Error: "java.lang.OutOfMemoryError: GC overhead limit exceeded" when trying to

Dear R helpers Suppose following is an output due to some R process. I wish to save it as a table in 'temp.db' df <- data.frame(x = c(5, 4, 3, 11), y = c(25, 16, 9, 121))     library(RSQLite)     write('** Initializing','')     drv <- dbDriver("SQLite", shared.cache = TRUE)     con <- dbConnect(drv, dbname = "temp.db",