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- Text Functions – DuckDB 13999
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...ount, character) Pads the string with the character on the left until it has count characters. Truncates the string on the right if it has more than count characters. ltrim(string[, characters]) Removes any occurrences of any of the characters from th...ring, source, target) Replaces any occurrences of the source with target in string . reverse(string) Reverses the string . right(string, count) Extract the right-most count characters. right_grapheme(string, count) Extracts the right-most count graphe...me clusters. rpad(string, count, character) Pads the string with the character on the right until it has count characters. Truncates the string on the right if it has more than count characters. rtrim(string[, char... - https://man.mtool.work/duckdb/1.3/sql/functions/text.html
- FROM and JOIN Clauses – DuckDB 12034
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...l relational operation used to connect two tables or relations horizontally. The relations are referred to as the left and right sides of the join based on how they are written in the join clause. Each result row has the columns from both relations. A...rned if an OUTER join is specified. Outer joins can be one of: LEFT (All rows from the left relation appear at least once) RIGHT (All rows from the right relation appear at least once) FULL (All rows from both relations appear at least once) A join th...t_names USING ( iata ); Semi and Anti Joins Semi joins return rows from the left table that have at least one match in the right table. Anti joins return rows from the left table that have no matches in the right table. When using a semi or anti join... - https://man.mtool.work/duckdb/1.3/sql/query_syntax/from.html
- Vector Similarity Search Extension – DuckDB 10632
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...macros to simplify matching multiple vectors against each other, so called "fuzzy joins". These are: vss_join(left_table, right_table, left_col, right_col, k, metric := 'l2sq') vss_match(right_table", left_col, right_col, k, metric := 'l2sq') k is th...e number of records to be selected from the right_table for each left_table record, ordered by the score. These do not currently make use of the HNSW index but are provided...c , vec , 2 ) res ; ┌───────┬─────────────────────────────────┬─────────────────────────────────────┐ │ score │ left_tbl │ right_tbl │ │ float │ struct(search_vec float[3]) │ struct(id integer, vec float[3]) │ ├───────┼────────────────────────────────... - https://man.mtool.work/duckdb/1.3/core_extensions/vss.html
- Editing – DuckDB 9794
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...are based on Emacs mode of readline . Below is a list of available commands. Moving Key Action Left Move back a character Right Move forward a character Up Move up a line. When on the first line, move to previous history entry Down Move down a line....move to next history entry Home Move to beginning of buffer End Move to end of buffer Ctrl + Left Move back a word Ctrl + Right Move forward a word Ctrl + A Move to beginning of buffer Ctrl + B Move back a character Ctrl + E Move to end of buffer Ctr...l + F Move forward a character Alt + Left Move back a word Alt + Right Move forward a word History Key Action Ctrl + P Move to previous history entry Ctrl + N Move to next history entry Ctrl +... - https://man.mtool.work/duckdb/1.3/clients/cli/editing.html
- ORDER BY Clause – DuckDB 9649
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...ULLS LAST ). ORDER BY ALL The ALL keyword indicates that the output should be sorted by every column in order from left to right. The direction of this sort may be modified using either ORDER BY ALL ASC or ORDER BY ALL DESC and/or NULLS FIRST or NULLS...using German collation rules: SELECT * FROM addresses ORDER BY city COLLATE DE ; ORDER BY ALL Examples Order from left to right (by address, then by city, then by zip) in ascending order: SELECT * FROM addresses ORDER BY ALL ; address city zip 111 Du...Duck Goose Ln Duck Town 11111-0001 111 Duck Duck Goose Ln DuckTown 11111 123 Quack Blvd DuckTown 11111 Order from left to right (by address, then by city, then by zip) in descending order: SELECT * FROM addresses ORDER BY ALL DESC ; address city zip... - https://man.mtool.work/duckdb/1.3/sql/query_syntax/orderby.html
- AsOf Join – DuckDB 9230
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...lues do not have a match and don't appear in the output. Outer AsOf Joins Because AsOf produces at most one match from the right hand side, the left side table will not grow as a result of the join, but it could shrink if there are missing times on th...e right. To handle this situation, you can use an outer AsOf Join: SELECT h.ticker , h.when , price * shares AS value FROM holding...sOf join. The AsOf join is designed to match each row in the left table ( holdings ) with the nearest preceding row in the right table ( prices ) based on the when column. If you want to retrieve the when column from both tables to see both timestamps... - https://man.mtool.work/duckdb/1.3/guides/sql_features/asof_join.html
- IN Operator – DuckDB 9102
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...pressions Copy Markdown IN Operator The IN operator checks containment of the left expression inside the collection on the right hand side (RHS). Supported collections on the RHS are tuples, lists, maps and subqueries that return a single column. IN (...on lists according to the semantics used in Python. Unlike for the IN tuple operator , the presence of NULL values on the right hand side of the expression does not make a difference in the result: SELECT 'Math' IN [ 'CS' , 'Math' , NULL ]; true SELE...x NOT IN y is equivalent to NOT (x IN y) . 関連キーワード Math operator expression values used column English works checks right hand side lists maps subqueries return single tuple present according semantics presence Subquery example unnest 関連するペ... - https://man.mtool.work/duckdb/1.3/sql/expressions/in.html
- Profiling – DuckDB 8264
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...operators adhere to the following convention: the probe side of the join is the left operand, while the build side is the right operand. Join operators in the query plan show the join type used: Inner joins are denoted as INNER . Left outer joins and...right outer joins are denoted as LEFT and RIGHT , respectively. Full outer joins are denoted as FULL . Tip To visualize query pl... - https://man.mtool.work/duckdb/1.3/dev/profiling.html
- Aggregate Functions – DuckDB 7974
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...key-value pairs representing the provided upper boundaries and counts of elements in the corresponding bins (left-open and right-closed partitions) of the datatype. A boundary at the largest value of the datatype is automatically added when elements l...key-value pairs representing the provided upper boundaries and counts of elements in the corresponding bins (left-open and right-closed partitions) of the datatype. A boundary at the largest value of the datatype is automatically added when elements l...xed, in the specified order) 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... - https://man.mtool.work/duckdb/1.3/sql/functions/aggregates.html
- Bitstring Functions – DuckDB 7974
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...STRING) 100 ~ Bitwise NOT ~('101'::BITSTRING) 010 << Bitwise shift left '1001011'::BITSTRING << 3 1011000 >> Bitwise shift right '1001011'::BITSTRING >> 3 0001001 Bitstring Functions The table below shows the available scalar functions for BIT type. N...s a bitstring with bits set for each distinct value. The left-most bit represents the smallest value in the column and the right-most bit the maximum value. If possible, the min and max are retrieved from the column statistics. Otherwise, it is also p... - https://man.mtool.work/duckdb/1.3/sql/functions/bitstring.html
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