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AsOf Join – DuckDB 11477: This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... mplement in standard SQL. Portfolio Example Data Set Let's start with a concrete example. Suppose we have a table of stock prices with timestamps: ticker when price APPL 2001-01-01 00:00:00 1 APPL 2001-01-01 00:01:00 2 APPL 2001-01-01 00:02:00 3 MSFT 2 ... 59:30 6.65 DATA 2001-01-01 00:00:30 17.95 DATA 2001-01-01 00:01:30 18.37 To load these tables to DuckDB, run: CREATE TABLE prices AS FROM 'https://duckdb.org/data/prices.csv' ; CREATE TABLE holdings AS FROM 'https://duckdb.org/data/holdings.csv' ; Inne ... he holding's timestamp by using an AsOf Join: SELECT h.ticker , h.when , price * shares AS value FROM holdings h ASOF JOIN prices p ON h.ticker = p.ticker AND h.when >= p.when ; This attaches the value of the holding at that time to each row: ticker wh ...; https://man.mtool.work/duckdb/1.3/guides/sql_features/asof_join.html

FROM and JOIN Clauses – DuckDB 9468: This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... on when working with temporal or similarly-ordered data is to find the nearest (first) event in a reference table (such as prices). This is called an as-of join: Attach prices to stock trades: SELECT t . * , p.price FROM trades t ASOF JOIN prices p ON ... side row with at most one right side row. It can be specified as an OUTER join to find unpaired rows (e.g., trades without prices or prices which have no trades.) Attach prices or NULLs to stock trades: SELECT * FROM trades t ASOF LEFT JOIN prices p ON ... ribute in the list must be the inequality, which will be greater than or equal to ( >= ): SELECT * FROM trades t ASOF JOIN prices p USING ( symbol , "when" ); Returns symbol, trades.when, price (but NOT prices.when): If you combine USING with a SELECT ...; https://man.mtool.work/duckdb/1.3/sql/query_syntax/from.html

HTTP Parquet Import – DuckDB 6920: This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview ... ad_parquet ( 'https:// domain /path/to/file.parquet' ); For example: SELECT * FROM read_parquet ( 'https://duckdb.org/data/prices.parquet' ); The function read_parquet can be omitted if the URL ends with .parquet : SELECT * FROM read_parquet ( 'https:/ ...; https://man.mtool.work/duckdb/1.3/guides/network_cloud_storage/http_import.html

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