Results of 1 - 8 of about 8 for population (0.005 sec.)
- PIVOT Statement – DuckDB 13339
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...mples use the dataset produced by the queries below: CREATE TABLE cities ( country VARCHAR , name VARCHAR , year INTEGER , population INTEGER ); INSERT INTO cities VALUES ( 'NL' , 'Amsterdam' , 2000 , 1005 ), ( 'NL' , 'Amsterdam' , 2010 , 1065 ), ( 'NL' ,...'US' , 'New York City' , 2010 , 8175 ), ( 'US' , 'New York City' , 2020 , 8772 ); SELECT * FROM cities ; country name year population NL Amsterdam 2000 1005 NL Amsterdam 2010 1065 NL Amsterdam 2020 1158 US Seattle 2000 564 US Seattle 2010 608 US Seattle 20...20 8772 PIVOT ON and USING Use the PIVOT statement below to create a separate column for each year and calculate the total population in each. The ON clause specifies which column(s) to split into separate columns. It is equivalent to the columns parameter... - https://man.mtool.work/duckdb/1.3/sql/statements/pivot.html
- Pivot Internals – DuckDB 9742
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...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_enum_0_0 AS ENUM ( SELECT DISTINCT year :: VARCHAR FROM cit...ies ORDER BY year ); PIVOT cities ON year IN __pivot_enum_0_0 USING sum ( population ); and finally translated into: SELECT country , name , list ( year ), list ( population_sum ) FROM ( SELECT country , nam...e , year , sum ( population ) AS population_sum FROM cities GROUP BY ALL ) GROUP BY ALL ; This produces the result: country name list("year") list(pop... - https://man.mtool.work/duckdb/1.3/internals/pivot.html
- Aggregate Functions – DuckDB 9290
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...the case of two input columns y and x ). Function Description corr(y, x) The correlation coefficient. covar_pop(y, x) The population covariance, which does not include bias correction. covar_samp(y, x) The sample covariance, which includes Bessel's bias c...ope of the linear regression line, where x is the independent variable and y is the dependent variable. regr_sxx(y, x) The population variance, which includes Bessel's bias correction, of the independent variable for non- NULL pairs, where x is the indepen...dent variable and y is the dependent variable. regr_sxy(y, x) The population covariance, which includes Bessel's bias correction. regr_syy(y, x) The population variance, which includes Bessel's bias... - https://man.mtool.work/duckdb/1.3/sql/functions/aggregates.html
- LIMIT and OFFSET Clauses – DuckDB 8910
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...n 5 (i.e., ignoring the first 5 rows): SELECT * FROM addresses LIMIT 5 OFFSET 5 ; Select the top 5 cities with the highest population: SELECT city , count ( * ) AS population FROM addresses GROUP BY city ORDER BY population DESC LIMIT 5 ; Select 10% of the...ows from the addresses table: SELECT * FROM addresses LIMIT 10 % ; Syntax 関連キーワード addresses rows clause first table population Syntax position values without city Documentation Query Copy Markdown Clauses output modifier Logically applied query rest... - https://man.mtool.work/duckdb/1.3/sql/query_syntax/limit.html
- SELECT Clause – DuckDB 8241
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...on, which is an expensive operation. Therefore, only use DISTINCT if necessary. DISTINCT ON Clause Select only the highest population city for each country: SELECT DISTINCT ON ( country ) city , population FROM cities ORDER BY population DESC ; The DISTINC... - https://man.mtool.work/duckdb/1.3/sql/query_syntax/select.html
- Samples – DuckDB 7627
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...n detail below. Samples require a sample size , which is an indication of how many elements will be sampled from the total population. Samples can either be given as a percentage ( 10% or 10 PERCENT ) or as a fixed number of rows ( 10 or 10 ROWS ). All thr... - https://man.mtool.work/duckdb/1.3/sql/samples.html
- Python Client API – DuckDB 7573
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...roups : str = '' , window_spec : str = '' , projected_columns : str = '' ) → duckdb.duckdb.DuckDBPyRelation ¶ Computes the population standard deviation for a given column Detailed examples can be found at Relational API page . stddev_samp ( self : duckdb....roups : str = '' , window_spec : str = '' , projected_columns : str = '' ) → duckdb.duckdb.DuckDBPyRelation ¶ Computes the population variance for a given column Detailed examples can be found at Relational API page . var_samp ( self : duckdb.duckdb.DuckDB... - https://man.mtool.work/duckdb/1.3/clients/python/reference/
- Relational API – DuckDB 7519
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...dard deviation for a given column stddev Computes the sample standard deviation for a given column stddev_pop Computes the population standard deviation for a given column stddev_samp Computes the sample standard deviation for a given column string_agg Con...given column, also projecting the original column var Computes the sample variance for a given column var_pop Computes the population variance for a given column var_samp Computes the sample variance for a given column variance Computes the sample variance... - https://man.mtool.work/duckdb/1.3/clients/python/relational_api.html
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