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- Lambda Functions – DuckDB 13808
- This page is for DuckDB 1.3, which is outdated.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
...he return type of list_filter is the same as the input list's. See list_filter examples . list_reduce(list, lambda(x, y)[, initial_value]) Reduces all elements of the input list into a single scalar value by executing the lambda function on a running re...sult and the next list element. The lambda function has an optional initial_value argument. See list_reduce examples or details. list_transform(list, lambda(x)) Description Returns a list that is th...ist_filter ([ 4 , 5 , 6 ], lambda x : x > 4 ) Result [5, 6] Aliases array_filter , filter list_reduce(list, lambda(x, y)[, initial_value]) Description Reduces all elements of the input list into a single scalar value by executing the lambda function on... - https://man.mtool.work/duckdb/1.3/sql/functions/lambda.html
- Pivot Internals – DuckDB 8531
- This page is for DuckDB 1.3, which is outdated.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
...is re-written again into a set of aggregations into lists. For example: PIVOT cities ON year USING sum ( population ); is initially translated into: CREATE TEMPORARY TYPE __pivot_enum_0_0 AS ENUM ( SELECT DISTINCT year :: VARCHAR FROM cities ORDER BY y...o populate month , and the double quotes to pull the column values for use in sales . This produces the same result as the initial example: empid dept month sales 1 electronics jan 1 1 electronics feb 2 1 electronics mar 3 1 electronics apr 4 1 electron... - https://man.mtool.work/duckdb/1.3/internals/pivot.html
- File Formats – DuckDB 8404
- This page is for DuckDB 1.3, which is outdated.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
...a set, it is worth loading the data into DuckDB. The queries will always be somewhat faster, which over time amortizes the initial load time. High decompression times: Some Parquet files are compressed using heavyweight compression algorithms such as gz... - https://man.mtool.work/duckdb/1.3/guides/performance/file_formats.html
- Tuning Workloads – DuckDB 8404
- 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
...unning the same query many times, but with different parameters. When a statement is prepared, it completes several of the initial portions of the query execution process (parsing, planning, etc.) and caches their output. When it is executed, those step... - https://man.mtool.work/duckdb/1.3/guides/performance/how_to_tune_workloads.html
- Aggregate Functions – DuckDB 8404
- 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
...value of x . Intuitively, assigns to each value of x an equisized sub-interval (left-open and right-closed except for the initial interval) of the interval [0, 1] , and picks the value of the sub-interval that contains pos . This is Type 1 in Hyndman &...value of x . Intuitively, assigns to each value of x an equisized sub-interval (left-open and right-closed except for the initial interval) of the interval [0, 1] , and picks the value of the sub-interval that contains pos . This is Type 1 in Hyndman &... - https://man.mtool.work/duckdb/1.3/sql/functions/aggregates.html
- Vector Similarity Search Extension – DuckDB 8278
- 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
...there are two things to keep in mind: It's faster to create the index after the table has been populated with data as the initial bulk load can make better use of parallelism on large tables. Deletes are not immediately reflected in the index, but are... - https://man.mtool.work/duckdb/1.3/core_extensions/vss.html
- WITH Clause – DuckDB 8278
- 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
...CT a + 1 , b FROM tbl WHERE a < 3 ) SELECT * FROM tbl ; a b 1 3 2 3 3 3 Using VALUES You can use the VALUES clause for the initial (anchor) part of the CTE: WITH RECURSIVE tbl ( a , b ) USING KEY ( a ) AS ( VALUES ( 1 , 3 ), ( 2 , 4 ) UNION SELECT a + 1... - https://man.mtool.work/duckdb/1.3/sql/query_syntax/with.html
- DuckDB_% Metadata Functions – DuckDB 8151
- 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
...ce is temporary. Temporary sequences are transient and only visible within the current connection. BOOLEAN start_value The initial value of the sequence. This value will be returned when nextval() is called for the very first time on this sequence. BIGI... - https://man.mtool.work/duckdb/1.3/sql/meta/duckdb_table_functions.html
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