Results of 1 - 10 of about 56 for standard (0.005 sec.)
- UNPIVOT Statement – DuckDB 15412
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...of the source column) and a VALUE column (which contains the value from the source column). DuckDB implements both the SQL Standard UNPIVOT syntax and a simplified UNPIVOT syntax. Both can utilize a COLUMNS expression to automatically detect the columns...An UNPIVOT may be used in a subquery and must be wrapped in parentheses. Note that this behavior is different than the SQL Standard Unpivot, as illustrated in subsequent examples. SELECT * FROM ( UNPIVOT monthly_sales ON COLUMNS ( * EXCLUDE ( empid , dep...ue col1 84 col2 woot Simplified UNPIVOT Full Syntax Diagram Below is the full syntax diagram of the UNPIVOT statement. SQL Standard UNPIVOT Syntax The full syntax diagram is below, but the SQL Standard UNPIVOT syntax can be summarized as: FROM [ dataset... - https://man.mtool.work/duckdb/1.3/sql/statements/unpivot.html
- Comparisons – DuckDB 11698
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...temap Live Demo Documentation / SQL / Expressions Copy Markdown Comparisons Comparison Operators The table below shows the standard comparison operators. Whenever either of the input arguments is NULL , the output of the comparison is NULL . Operator Des...r than or equal to 4 >= NULL NULL = or == equal NULL = NULL NULL <> or != not equal 2 <> 2 false The table below shows the standard distinction operators. These operators treat NULL values as equal. Operator Description Example Result IS DISTINCT FROM no...creating a macro with the typeof function or implementing a user-defined function . BETWEEN and IS [NOT] NULL Besides the standard comparison operators there are also the BETWEEN and IS (NOT) NULL operators. These behave much like operators, but have sp... - https://man.mtool.work/duckdb/1.3/sql/expressions/comparison_operators.html
- PIVOT Statement – DuckDB 10461
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...alculated using an aggregate function on the subset of rows that match each distinct value. DuckDB implements both the SQL Standard PIVOT syntax and a simplified PIVOT syntax that automatically detects the columns to create while pivoting. PIVOT_WIDER ma...; A PIVOT may be used in a subquery and must be wrapped in parentheses. Note that this behavior is different than the SQL Standard Pivot, as illustrated in subsequent examples. SELECT * FROM ( PIVOT cities ON year USING sum ( population ) GROUP BY count...783 9510 NULL 24962 1910 Simplified PIVOT Full Syntax Diagram Below is the full syntax diagram of the PIVOT statement. SQL Standard PIVOT Syntax The full syntax diagram is below, but the SQL Standard PIVOT syntax can be summarized as: SELECT * FROM datas... - https://man.mtool.work/duckdb/1.3/sql/statements/pivot.html
- SQL to/from JSON – DuckDB 9105
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...ll,"query_location":18446744073709551615},"where_clause":null,"group_expressions":[],"group_sets":[],"aggregate_handling":"STANDARD_HANDLING","having":null,"sample":null,"qualify":null},"named_param_map":[]}]} Example with multiple statements and skip op...tor":true,"export_state":false}],"from_table":{"type":"EMPTY","query_location":18446744073709551615},"aggregate_handling":"STANDARD_HANDLING"}},{"node":{"type":"SELECT_NODE","select_list":[{"class":"FUNCTION","type":"FUNCTION","query_location":23,"functi...ue,"export_state":false}],"from_table":{"type":"BASE_TABLE","query_location":32,"table_name":"tbl1"},"aggregate_handling":"STANDARD_HANDLING"}}]} Skip the default values in the AST (e.g., "distinct":false ): SELECT json_serialize_sql ( 'SELECT 1 + 2; SEL... - https://man.mtool.work/duckdb/1.3/data/json/sql_to_and_from_json.html
- SQL Quirks – DuckDB 8855
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...ncies. Some are vestiges of our feathered friend's evolution; others are inevitable because we strive to adhere to the SQL Standard and specifically to PostgreSQL's dialect (see the “PostgreSQL Compatibility” page for exceptions). The rest may simply com...functions sum , list , and string_agg all return NULL instead of 0 , [] and '' , respectively. This is dictated by the SQL Standard and obeyed by all SQL implementations we know. This behavior is inherited by the list aggregate list_sum , but not by the...DuckDB original list_dot_product which returns 0 on empty lists. 0 vs. 1-Based Indexing To comply with standard SQL, one-based indexing is used almost everywhere, e.g., array and string indexing and slicing, and window functions ( row... - https://man.mtool.work/duckdb/1.3/sql/dialect/sql_quirks.html
- Dot Commands – DuckDB 8737
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...E Send output to FILE or stdout if FILE is omitted .print STRING... Print literal STRING .prompt MAIN CONTINUE Replace the standard prompts .quit Exit this program .read FILE Read input from FILE .rows Row-wise rendering of query results (default) .safe_...E ? TABLE ? Set output mode .output : Writing Results to a File By default, the DuckDB CLI sends results to the terminal's standard output. However, this can be modified using either the .output or .once commands. Pass in the desired output file location...as a parameter. The .once command will only output the next set of results and then revert to standard out, but .output will redirect all subsequent output to that file location. Note that each result will overwrite the entir... - https://man.mtool.work/duckdb/1.3/clients/cli/dot_commands.html
- Spatial Extension – DuckDB 8369
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...way, but the design and behavior of the GEOMETRY type is actually based on the Simple Features geometry model, which is a standard used by many other databases and GIS software. The spatial extension also includes a couple of experimental non-standard e...type extension types geometry these geospatial different used Spatial DuckDB what actually store subtypes These well based standard couple functions Documentation Core Extensions Copy 関連するページ GDAL Integration R LOAD / INSTALL Statements Nested Fun... - https://man.mtool.work/duckdb/1.3/core_extensions/spatial/overview.html
- Aggregate Functions – DuckDB 8118
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...on- NULL pairs , where x is the independent variable and y is the dependent variable. skewness(x) The skewness. sem(x) The standard error of the mean. stddev_pop(x) The population standard deviation. stddev_samp(x) The sample standard deviation. var_pop(...L pairs, where x is the independent variable and y is the dependent variable. Formula - Alias(es) - sem(x) Description The standard error of the mean. Formula - Alias(es) - skewness(x) Description The skewness. Formula - Alias(es) - stddev_pop(x) Descrip...tion The population standard deviation. Formula sqrt(var_pop(x)) Alias(es) - stddev_samp(x) Description The sample standard deviation. Formula sqrt(var... - https://man.mtool.work/duckdb/1.3/sql/functions/aggregates.html
- Execution Format – DuckDB 7985
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...erators in DuckDB are optimized to work on Vectors of a fixed size. This fixed size is commonly referred to in the code as STANDARD_VECTOR_SIZE . The default STANDARD_VECTOR_SIZE is 2048 tuples. Vector Format Vectors logically represent arrays that conta...t of supported vector formats is shown. Flat Vectors Flat vectors are physically stored as a contiguous array, this is the standard uncompressed vector format. For flat vectors the logical and physical representations are identical. Constant Vectors Cons... - https://man.mtool.work/duckdb/1.3/internals/vector.html
- Python DB API – DuckDB 7868
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...s and Format Execution Format Pivot Sitemap Live Demo Documentation / Client APIs / Python Copy Markdown Python DB API The standard DuckDB Python API provides a SQL interface compliant with the DB-API 2.0 specification described by PEP 249 similar to the...o .fetchone will return None # None The description property of the connection object contains the column names as per the standard. Prepared Statements DuckDB also supports prepared statements in the API with the execute and executemany methods. The val...to insert large amounts of data into DuckDB. See the data ingestion page for better options. Named Parameters Besides the standard unnamed parameters, like $1 , $2 etc., it's also possible to supply named parameters, like $my_parameter . When using name... - https://man.mtool.work/duckdb/1.3/clients/python/dbapi.html
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