Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
501 views
in Technique[技术] by (71.8m points)

r - Is it possible to insert (add) a row to a SQLite db table using dplyr package?

I am new to the database connection capabilities of dplyr package, but I am very interested in using it for an SQLite connection. I followed this tutorial and created an SQLite database (my_db)

my_db <- src_sqlite("my_db.sqlite3", create = T)

and inserted a dataframe (df) as a table (my_table) of this database.

copy_to(my_db,df,"my_table")

Now I want to insert new rows in this table. I tried something like this (and yes I must admit it doesn't even look like promising... but I still gave it a try):

collect(build_sql("INSERT INTO my_table VALUES (",newdf,")", con=my_db))

Does anyone know if adding rows to an existing sqlite db table is even possible using dplyr? Or how would you deal with this problem? Many thanks in advance!

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

No, you can do this all within dplyr.

require(dplyr)

my_db <- src_sqlite( "my_db.sqlite3", create = TRUE)                 # create src
copy_to( my_db, iris, "my_table", temporary = FALSE)                 # create table
newdf = iris                                                         # create new data
db_insert_into( con = my_db$con, table = "my_table", values = newdf) # insert into

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...