Results of 1 - 10 of about 51 for Length (0.005 sec.)
- Integration with Ibis 12903
- Ibis is a Python dataframe library that supports 20+ backends, with DuckDB as the default. Ibis with DuckDB provides a Pythonic interface for SQL with great performance. Warning Ibis 12.0.0 and earlier do not support DuckDB 2.0. The example
...we can interact with. penguins = con.table("penguins") penguins DatabaseTable: penguins species string island string bill_length_mm float64 bill_depth_mm float64 flipper_length_mm int64 body_mass_g int64 sex string year int64 Ibis is lazily evaluated,...en to_pandas to get the first few rows of the table as a pandas DataFrame. penguins.head().to_pandas() species island bill_length_mm bill_depth_mm flipper_length_mm body_mass_g sex year 0 Adelie Torgersen 39.1 18.7 181.0 3750.0 male 2007 1 Adelie Torge...pandas will evaluate (when you're ready!). penguins.head() r0 := DatabaseTable: penguins species string island string bill_length_mm float64 bill_depth_mm float64 flipper_length_mm int64 body_mass_g int64 sex string year int64 Limit[r0, n=5] Ibis retur... - https://man.mtool.work/duckdb/2.0/guides/python/ibis.html
- Bitstring Functions 11884
- This section describes functions and operators for examining and manipulating BITSTRING values. Bitstrings must be of equal length when performing the bitwise operands AND, OR and XOR. When bit shifting, the original length of the string is
...scalar functions for BIT type. Name Description bit_count(bitstring) Returns the number of set bits in the bitstring. bit_length(bitstring) Returns the number of bits in the bitstring. bit_position(substring, bitstring) Returns first starting index of...specified substring within bits, or zero if it's not present. The first (leftmost) bit is indexed 1. bitstring(bitstring, length) Returns a bitstring of determined length. get_bit(bitstring, index) Extracts the nth bit from bitstring; the first (leftm...ost) bit is indexed 0. length(bitstring) Alias for bit_length . octet_length(bitstring) Returns the number of bytes in the bitstring. set_bit(bitstring,... - https://man.mtool.work/duckdb/2.0/sql/functions/bitstring.html
- Text Types 10730
- In DuckDB, strings can be stored in the VARCHAR field. The field allows storage of Unicode characters. Internally, the data is encoded as UTF-8. Name Aliases Description VARCHAR CHAR , BPCHAR , STRING , TEXT Variable-length character string
...VARCHAR(n) CHAR(n) , BPCHAR(n) , STRING(n) , TEXT(n) Variable-length character string. The maximum length n has no effect and is only provided for compatibility Specifying a Length Limit Spec...ifying the length for the VARCHAR , STRING and TEXT types is not required and has no effect on the system. Specifying the length will not im...space of the strings in the database. These variants are supported for compatibility with other systems that do require a length to be specified for strings. If you wish to restrict the number of characters in a VARCHAR column for data integrity reaso... - https://man.mtool.work/duckdb/2.0/sql/data_types/text.html
- Text Functions 10685
- Text Functions and Operators This section describes functions and operators for examining and manipulating STRING values . Function Description string[index] Extracts a single character using a (1-based) index . string[begin:end] Extracts a
...x . width defaults to 80. base64(blob) Alias for to_base64 . bin(string) Converts the string to binary representation. bit_length(string) Number of bits in a string . char_length(string) Alias for length . character_length(string) Alias for length . ch...-most count characters. left_grapheme(string, count) Extracts the left-most count grapheme clusters. len(string) Alias for length . length(string) Number of characters in string . length_grapheme(string) Number of grapheme clusters in string . like_esc...string . strlen(string) Number of bytes in string . strpos(string, search_string) Alias for instr . substr(string, start[, length]) Alias for substring . substring(string, start[, length]) Extracts substring starting from character start up to the end... - https://man.mtool.work/duckdb/2.0/sql/functions/text.html
- SQL to/from JSON 10416
- DuckDB provides functions to serialize and deserialize SELECT statements between SQL and JSON, as well as executing JSON serialized statements. Function Type Description json_deserialize_sql(json) Scalar Deserialize one or many json seriali
...e_map":{"map":[]},"select_list":[{"class":"CONSTANT","type":"VALUE_CONSTANT","alias":"","query_location":7,"query_location_length":1,"literal":{"kind":"INTEGER","text":"2"}}],"from_table":{"type":"EMPTY","alias":"","sample":null,"query_location":184467...44073709551615,"query_location_length":0},"where_clause":null,"group_expressions":[],"group_sets":[],"aggregate_handling":"STANDARD_HANDLING","having":null,"sam...{"type":"SELECT_NODE","cte_map":{},"select_list":[{"class":"FUNCTION","type":"FUNCTION","query_location":9,"query_location_length":0,"function_name":"+","order_bys":{"type":"ORDER_MODIFIER"},"distinct":false,"is_operator":true,"export_state":false,"arg... - https://man.mtool.work/duckdb/2.0/data/json/sql_to_and_from_json.html
- List Functions 8977
- Function Description list[index] Extracts a single list element using a (1-based) index . list[begin[:end][:step]] Extracts a sublist using slice conventions . Negative values are accepted. list1 && list2 Alias for list_has_any . list1 <->
...ny . array_indexof(list, element) Alias for list_position . array_intersect(list1, list2) Alias for list_intersect . array_length(list) Alias for length . array_pop_back(list) Returns the list without the last element. array_pop_front(list) Returns the...y_where(value_list, mask_list) Alias for list_where . array_zip(list_1, ..., list_n[, truncate]) Alias for list_zip . char_length(list) Alias for length . character_length(list) Alias for length . concat(value, ...) Concatenates multiple strings or lis...t and stop - the stop parameter is inclusive. grade_up(list[, col1][, col2]) Alias for list_grade_up . len(list) Alias for length . length(list) Returns the length of the list . list_aggr(list, function_name, ...) Alias for list_aggregate . list_aggreg... - https://man.mtool.work/duckdb/2.0/sql/functions/list.html
- Vectors 8797
- Vectors represent a horizontal slice of a column. They hold a number of values of a specific type, similar to an array. Vectors are the core data representation used in DuckDB. Vectors are typically stored within data chunks . The vector an
...., <= 12 bytes ) or a pointer to the string data if it is longer than 12 bytes. typedef struct { union { struct { uint32_t length; char prefix[4]; char *ptr; } pointer; struct { uint32_t length; char inlined[12]; } inlined; } value; } duckdb_string_t;...The length can either be accessed directly, or the duckdb_string_is_inlined can be used to check if a string is inlined. Decimals Dec...L . Lists Lists are nested types that contain a single child type, repeated x times per row. Think of them like a variable-length array in C. The way to access list data using vectors is to access the child vector using the duckdb_list_vector_get_child... - https://man.mtool.work/duckdb/2.0/clients/c/vector.html
- Spatial Functions 8752
- Function Index Scalar Functions Function Summary DuckDB_PROJ_Compiled_Version Returns a text description of the PROJ library version that this instance of DuckDB was compiled against. DuckDB_Proj_Version Returns a text description of the PR
...d and ST_IsSimple). ST_IsSimple Returns true if the geometry is simple ST_IsValid Returns true if the geometry is valid ST_Length Returns the length of the input line geometry ST_Length_Spheroid Returns the length of the input geometry in meters, using...ellipsoidal model of the earth ST_LineInterpolatePoint Returns a point interpolated along a line at a fraction of total 2D length. ST_LineInterpolatePoints Returns a multi-point interpolated along a line at a fraction of total 2D length. ST_LineLocateP...oint Returns the location on a line closest to a point as a fraction of the total 2D length of the line. ST_LineMerge "Merges" the input line geometry, optionally taking direction into account. ST_LineString2DFromW... - https://man.mtool.work/duckdb/2.0/core_extensions/spatial/functions.html
- Complete API 8557
- This page contains the reference for DuckDB's C API. The reference contains several deprecation notices. These concern methods whose long-term availability is not guaranteed as they may be removed in the future. That said, DuckDB's develope
...d * ptr ); idx_t duckdb_vector_size (); bool duckdb_string_is_inlined ( duckdb_string_t string ); uint32_t duckdb_string_t_length ( duckdb_string_t string ); const char * duckdb_string_t_data ( duckdb_string_t * string ); Date Time Timestamp Helpers du...ar ( duckdb_prepared_statement prepared_statement , idx_t param_idx , const char * val ); duckdb_state duckdb_bind_varchar_length ( duckdb_prepared_statement prepared_statement , idx_t param_idx , const char * val , idx_t length ); duckdb_state duckdb_...bind_blob ( duckdb_prepared_statement prepared_statement , idx_t param_idx , const void * data , idx_t length ); duckdb_state duckdb_bind_null ( duckdb_prepared_statement prepared_statement , idx_t param_idx ); Execute Prepared Stat... - https://man.mtool.work/duckdb/2.0/clients/c/api.html
- Values 8242
- The value class represents a single value of any type. API Reference Overview void duckdb_destroy_value ( duckdb_value * value ); duckdb_value duckdb_create_varchar ( const char * text ); duckdb_value duckdb_create_varchar_length ( const ch
...ar * text , idx_t length ); duckdb_value duckdb_create_bool ( bool input ); duckdb_value duckdb_create_int8 ( int8_t input ); duckdb_value duckdb_c...kdb_value duckdb_create_interval ( duckdb_interval input ); duckdb_value duckdb_create_blob ( const uint8_t * data , idx_t length ); duckdb_value duckdb_create_bit ( duckdb_bit input ); duckdb_value duckdb_create_uuid ( duckdb_uhugeint input ); bool du...he null-terminated string Return Value The value. This must be destroyed with duckdb_destroy_value . duckdb_create_varchar_length Creates a value from a string Syntax duckdb_value duckdb_create_varchar_length ( const char * text , idx_t length ); Param... - https://man.mtool.work/duckdb/2.0/clients/c/value.html
DuckDB 2.0 Documentation / man.mtool.work