(con,"diamonds",diamonds,overwrite = TRUE) # this works diamonds_db <- dplyr::tbl(con, sql("select * from diamonds")) # this doesn't work -- I'm trying to save this as duckdb database object (as oppose to a csv file or parquet file) -- I am assuming this is better saving ...
For example, CSV files can be loaded by [auto-inferring their schema]({% link docs/data/csv/auto_detection.md %}) using CREATE TABLE tbl AS FROM 'input.csv'. Moreover, there numerous SQL shorthands known as [“friendly SQL”]({% link docs/sql/dialect/friendly_sql.md %}) for more...
To demonstrate this fantastic feature, we first save “df” as a parquet file and “avg” as a csv file. R Python write_parquet(df, "housing.parquet") write.csv(avg, "housing_avg.csv", row.names = FALSE) # Save df and avg to different file types df.to_parquet("housing.parquet")...
@@ -294,7 +295,8 @@ void CSVSniffer::DetectDateAndTimeStampFormats(CSVStateMachine &candidate, const bool had_format_candidates = !save_format_candidates.empty(); bool initial_format_candidates = save_format_candidates.size() == original_format_candidates.at(sql_type.id()).format.size();...
NULL AS year ) TO "/lakehouse/default/Files/scada" (FORMAT PARQUET, PARTITION_BY (year), OVERWRITE_OR_IGNORE ) ; Listing of CSV files for ingestion from the source system. Removal of already ingested files SET VARIABLE list_of_files = ( ...
(select unnest(skills) as skill from job) group by skill order by skill_count desc) to 'analysis.csv' (HEADER, DELIMITER ',');)";conn.Query(skills_analysis_query);std::string raw_result_query=R"(copy(select * from job) to 'job.csv' (HEADER, DELIMITER ',');)";conn.Query(raw_...
Getting an actual schema so that you can get NDJSON into a database is still a somewhat manual process compared to CSV. Spark is great at NDJSON dataframes, but Spark is a heavyweight solution that we can't just install on a host. What we really want is an in-process "no dependencies...
As shown by the tests, this does break some existing behavior. If a TIMESTAMP is cast to TIMESTAMP_TZ and it is used in a COPY to csv with ICU not loaded (and not autoinstall/loadable) it will throw a binder error. Tishj added 12 commits April 16, 2024 20:53 use ExpressionExecu...
The duckdb CLI command can read from a file using read_csv_auto(): duckdb mydb "create table mytable as select * from read_csv_auto('mydata.csv', HEADER=TRUE);" When I try to send the same data to the /dev/stdin file and have duckdb load it from there, it fails: cat mydata...
copy_csv.cpp query_function.cpp range.cpp read_csv.cpp unnest.cpp include duckdb.h duckdb catalog/default default_functions.hpp default_table_functions.hpp common allocator.hpp arrow/appender append_data.hpp enum_data.hpp list.hpp list_data.hpp list_view_data.hpp ...