Results of 1 - 10 of about 28 for lists (0.004 sec.)
- List Functions – DuckDB 14223
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...turns the list without the last element. array_pop_front(list) Returns the list without the first element. flatten(list_of_lists) Concatenate a list of lists into a single list. This only flattens one level of the list (see examples ). len(list) Retur...on-null value in the list. list_append(list, element) Appends element to list . list_concat(list1, ..., listn) Concatenate lists. NULL inputs are skipped. See also || list_contains(list, element) Returns true if the list contains the element. list_cos...ine_similarity(list1, list2) Compute the cosine similarity between two lists. list_cosine_distance(list1, list2) Compute the cosine distance between two lists. Equivalent to 1.0 - list_cosine_similar... - https://man.mtool.work/duckdb/1.3/sql/functions/list.html
- Unnesting – DuckDB 12289
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...3 , 4 ]], [[ 5 , 6 ], [ 7 , 8 , 9 ], []], [[ 10 , 11 ]]], max_depth : = 2 ); The unnest special function is used to unnest lists or structs by one level. The function can be used as a regular scalar function, but only in the SELECT clause. Invoking un...nest with the recursive parameter will unnest lists and structs of multiple levels. The depth of unnesting can be limited using the max_depth parameter (which assumes recursi...ve unnesting by default). Unnesting Lists Unnest a list, generating 3 rows (1, 2, 3): SELECT unnest ([ 1 , 2 , 3 ]); Unnest a list, generating 3 rows ((1, 10), (2,... - https://man.mtool.work/duckdb/1.3/sql/query_syntax/unnest.html
- List Type – DuckDB 11110
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...at Execution Format Pivot Sitemap Live Demo Documentation / SQL / Data Types Copy Markdown List Type A LIST column encodes lists of values. Fields in the column can have values with different lengths, but they must all have the same underlying type. L...IST s are typically used to store arrays of numbers, but can contain any uniform data type, including other LIST s and STRUCT s. LIST s are similar to PostgreSQL's ARRAY type. DuckDB uses the LIST terminology, but some array_ functions...PostgreSQL compatibility. See the data types overview for a comparison between nested data types. For storing fixed-length lists, DuckDB uses the ARRAY type . Creating Lists Lists can be created using the list_value(expr, ...) function or the equivale... - https://man.mtool.work/duckdb/1.3/sql/data_types/list.html
- Typecasting – DuckDB 8930
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...string literals (such as 'string' ) have special implicit casting rules. See the literal types page for more information. Lists / Arrays Lists can be explicitly cast to other lists using the same casting rules. The cast is applied to the children of...R and a new list is constructed. SELECT CAST ([ 1 , 2 , 3 ] AS VARCHAR []); Arrays Arrays follow the same casting rules as lists. In addition, arrays can be implicitly cast to lists of the same type. For example, an INTEGER[3] array can be implicitly...xplicit Casting Implicit Casting Combination Casting Casting Operations Matrix Lossy Casts Overflows Varchar Literal Types Lists / Arrays Arrays Structs Unions... - https://man.mtool.work/duckdb/1.3/sql/data_types/typecasting.html
- Pivot Internals – DuckDB 8865
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...iting and a dedicated PhysicalPivot operator for higher performance. Each PIVOT is implemented as set of aggregations into lists and then the dedicated PhysicalPivot operator converts those lists into column names and values. Additional pre-processing...auses. After the IN clauses have been populated with ENUM s, the query 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_e...10, 2020] [564, 608, 738] US New York City [2000, 2010, 2020] [8015, 8175, 8772] The PhysicalPivot operator converts those lists into column names and values to return this result: country name 2000 2010 2020 NL Amsterdam 1005 1065 1158 US Seattle 564... - https://man.mtool.work/duckdb/1.3/internals/pivot.html
- Blob Functions – DuckDB 8668
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...nctions and operators for examining and manipulating BLOB values . Name Description arg1 || arg2 Concatenates two strings, lists, or blobs. Any NULL input results in NULL . See also concat(arg1, arg2, ...) and list_concat(list1, list2) . base64(blob)...Converts a blob to a base64 encoded string. concat(value, ...) Concatenates multiple strings, lists, or blobs. NULL inputs are skipped. See also operator || . decode(blob) Converts blob to VARCHAR . Fails if blob is not va...nhex(value) Converts a value from hexadecimal representation to a blob. arg1 || arg2 Description Concatenates two strings, lists, or blobs. Any NULL input results in NULL . See also concat(arg1, arg2, ...) and list_concat(list1, list2) . Example 1 'Du... - https://man.mtool.work/duckdb/1.3/sql/functions/blob.html
- Vectors – DuckDB 8357
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...ty mask. The reason for this is that the child elements of a struct can be NULL , but the struct itself can also be NULL . Lists Lists are nested types that contain a single child type, repeated x times per row. Think of them like a variable-length ar...ing the duckdb_list_vector_get_child method. The duckdb_vector_get_data must be used to get the offsets and lengths of the lists stored as duckdb_list_entry , that can then be applied to the child vector. typedef struct { uint64_t offset ; uint64_t le...ngth ; } duckdb_list_entry ; Note that both list entries itself and any children stored in the lists can also be NULL . This must be checked using the validity mask again. Arrays Arrays are nested types that contain a singl... - https://man.mtool.work/duckdb/1.3/clients/c/vector.html
- IN Operator – DuckDB 8176
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...nt 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 (val1, val2, ...) (Tuple) The IN operator on a tuple (val1, val2, ......th' , NULL ); true SELECT 'English' IN ( 'CS' , 'Math' , NULL ); NULL IN [val1, val2, ...] (List) The IN operator works on lists according to the semantics used in Python. Unlike for the IN tuple operator , the presence of NULL values on the right han...uivalent 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 関連するページ Subqueries... - https://man.mtool.work/duckdb/1.3/sql/expressions/in.html
- Indexing – DuckDB 7865
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...DB uses 1-based indexing except for JSON objects , which use 0-based indexing. Examples The index origin is 1 for strings, lists, etc. SELECT list [ 1 ] AS element FROM ( SELECT [ 'first' , 'second' , 'third' ] AS list ); ┌─────────┐ │ element │ │ var...B based indexing objects index origin list third Documentation Dialect Copy Markdown Indexing uses except Examples strings lists varchar 関連するページ List Functions Installing and Loading the JSON extension Array Type Map Functions JSON Import Lambd... - https://man.mtool.work/duckdb/1.3/sql/dialect/indexing.html
- Information Schema – DuckDB 7799
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...cs_basic' columns : Columns The view that describes the catalog information for columns is information_schema.columns . It lists the column present in the database and has the following layout: Column Description Type Example table_catalog Name of the.... VARCHAR NO ACTION schemata : Database, Catalog and Schema The top level catalog view is information_schema.schemata . It lists the catalogs and the schemas present in the database and has the following layout: Column Description Type Example catalog...: Tables and Views The view that describes the catalog information for tables and views is information_schema.tables . It lists the tables present in the database and has the following layout: Column Description Type Example table_catalog The catalog... - https://man.mtool.work/duckdb/1.3/sql/meta/information_schema.html
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