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AsOf Join – DuckDB 12353: This page is for DuckDB 1.3, which is outdated.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 ... 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' ; Inn ... er AsOf Joins We can compute the value of each holding at that point in time by finding the most recent price before the holding's timestamp by using an AsOf Join: SELECT h.ticker , h.when , price * shares AS value FROM holdings h A ...; https://man.mtool.work/duckdb/1.3/guides/sql_features/asof_join.html

FROM and JOIN Clauses – DuckDB 8802: This page is for DuckDB 1.3, which is outdated.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 O ... 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

Literal Types – DuckDB 8099: This page is for DuckDB 1.3, which is outdated.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 ... lo world $$ AS msg ; ┌──────────────┐ │ msg │ │ varchar │ ├──────────────┤ │ Hello\nworld │ └──────────────┘ SELECT $$ The price is $ 9.95 $$ AS msg ; msg The price is $9.95 Even more, you can insert alphanumeric tags in the double-dollar symbols to a ...; https://man.mtool.work/duckdb/1.3/sql/data_types/literal_types.html

Information Schema – DuckDB 7674: 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 ... taining the table. VARCHAR 'main' table_name Name of the table. VARCHAR 'widgets' column_name Name of the column. VARCHAR 'price' ordinal_position Ordinal position of the column within the table (count starts at 1). INTEGER 5 column_default Default ex ... that is used by some constraint VARCHAR 'widgets' column_name Name of the column that is used by some constraint VARCHAR 'price' constraint_catalog Name of the database that contains the constraint (always the current database) VARCHAR 'my_db' constr ...; https://man.mtool.work/duckdb/1.3/sql/meta/information_schema.html

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