Results of 1 - 10 of about 25 for Subquery (0.004 sec.)
- Subqueries – DuckDB 16073
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...Subqueries are usually based on SELECT ... FROM , but in DuckDB other query constructs such as PIVOT can also appear as a subquery. Scalar Subquery Scalar subqueries are subqueries that return a single value. They can be used anywhere where an expressio...n can be used. If a scalar subquery returns more than a single value, an error is raised (unless scalar_subquery_error_on_multiple_rows is set to false , in w...can run the following query to obtain the minimum grade: SELECT min ( grade ) FROM grades ; min(grade) 7 By using a scalar subquery in the WHERE clause, we can figure out for which course this grade was obtained: SELECT course FROM grades WHERE grade = (... - https://man.mtool.work/duckdb/1.3/sql/expressions/subqueries.html
- IN Operator – DuckDB 9365
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...es): SELECT 'key1' IN MAP { 'key1' : 50 , 'key2' : 75 }; true SELECT 'key3' IN MAP { 'key1' : 50 , 'key2' : 75 }; false IN Subquery The IN operator works with subqueries that return a single column. For example: SELECT 42 IN ( SELECT unnest ([ 32 , 42 ,...52 ]) AS x ); true If the subquery returns more than one column, a Binder Error is thrown: SELECT 42 IN ( SELECT unnest ([ 32 , 42 , 52 ]) AS x , 'a' AS y );...Binder Error: Subquery returns 2 columns - expected 1 IN String The IN operator can be used as a shorthand for the contains string function . For... - https://man.mtool.work/duckdb/1.3/sql/expressions/in.html
- FROM and JOIN Clauses – DuckDB 9099
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...ngle table, a combination of multiple tables that are joined together using JOIN clauses, or another SELECT query inside a subquery node. DuckDB also has an optional FROM -first syntax which enables you to also query without a SELECT statement. Examples...) AS t ( i ); Select all columns from the CSV file called test.csv : SELECT * FROM 'test.csv' ; Select all columns from a subquery: SELECT * FROM ( SELECT * FROM table_name ); Select the entire row of the table as a struct: SELECT t FROM t ; Select the...entire row of the subquery as a struct (i.e., a single column): SELECT t FROM ( SELECT unnest ( generate_series ( 41 , 43 )) AS x , 'hello' AS y ) t... - https://man.mtool.work/duckdb/1.3/sql/query_syntax/from.html
- Describe – DuckDB 8535
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...red to the result when describing a table , nullability ( null ) and key information ( key ) are lost. Using DESCRIBE in a Subquery DESCRIBE can be used a subquery. This allows creating a table from the description, for example: CREATE TABLE tbl_descript...L DuckDB Home Code of Conduct Trademark Use Blog In this article Describing a Table Describing a Query Using DESCRIBE in a Subquery Describing Remote Tables... - https://man.mtool.work/duckdb/1.3/guides/meta/describe.html
- QUALIFY Clause – DuckDB 8535
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...filters the results of aggregate functions applied based on the GROUP BY clause . The QUALIFY clause avoids the need for a subquery or WITH clause to perform this filtering (much like HAVING avoids a subquery). An example using a WITH clause instead of Q...se schema rank functions window based number duckdb Filter defined results filtering example using Syntax used avoids need subquery below examples following column reference ranked 関連するページ WINDOW Clause Window Functions SELECT Clause SELECT Statem... - https://man.mtool.work/duckdb/1.3/sql/query_syntax/qualify.html
- CREATE MACRO Statement – DuckDB 8535
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...cro for a CASE expression: CREATE MACRO ifelse ( a , b , c ) AS CASE WHEN a THEN b ELSE c END ; Create a macro that does a subquery: CREATE MACRO one () AS ( SELECT 1 ); Macros are schema-dependent, and have an alias, FUNCTION : CREATE FUNCTION main. my_...Error: Macro function 'my_macro(a)' requires a single positional argument, but 2 positional arguments were provided. Using Subquery Macros If a MACRO is defined as a subquery, it cannot be invoked in a table function. DuckDB will return the following err...k Use Blog In this article Examples Scalar Macros Table Macros Overloading Syntax Limitations Using Named Parameters Using Subquery Macros Overloads Recursive Functions... - https://man.mtool.work/duckdb/1.3/sql/statements/create_macro.html
- Summarize – DuckDB 8468
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...215 0.0% l_comment VARCHAR Tiresias zzle? furiously iro 3558599 NULL NULL NULL NULL NULL 6001215 0.0% Using SUMMARIZE in a Subquery SUMMARIZE can be used a subquery. This allows creating a table from the summary, for example: CREATE TABLE tbl_summary AS...Foundation, Amsterdam NL DuckDB Home Code of Conduct Trademark Use Blog In this article Usage Example Using SUMMARIZE in a Subquery Summarizing Remote Tables... - https://man.mtool.work/duckdb/1.3/guides/meta/summarize.html
- query and query_table Functions – DuckDB 8153
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...wn query and query_table Functions The query and query_table functions take a string literal, and convert it into a SELECT subquery and a table reference, respectively. Note that these functions only accept literal strings. As such, they are not as power...t alias literal they powerful generic example summarize Documentation Guides Features Copy Markdown Functions take convert subquery reference respectively Note these 関連するページ Summarize DESCRIBE Statement CALL Statement SELECT Clause SUMMARIZE State... - https://man.mtool.work/duckdb/1.3/guides/sql_features/query_and_query_table_func...
- PIVOT Statement – DuckDB 7887
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...The PIVOT statement may be included within a SELECT statement as a CTE ( a Common Table Expression, or WITH clause ), or a subquery. This allows for a PIVOT to be used alongside other SQL logic, as well as for multiple PIVOT s to be used in one query. No...AS ( PIVOT cities ON year USING sum ( population ) GROUP BY country ) SELECT * FROM pivot_alias ; 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 su... - https://man.mtool.work/duckdb/1.3/sql/statements/pivot.html
- UNPIVOT Statement – DuckDB 7887
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...e UNPIVOT statement may be included within a SELECT statement as a CTE ( a Common Table Expression, or WITH clause ), or a subquery. This allows for an UNPIVOT to be used alongside other SQL logic, as well as for multiple UNPIVOT s to be used in one quer...UMNS ( * EXCLUDE ( empid , dept )) INTO NAME month VALUE sales ) SELECT * FROM unpivot_alias ; 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... - https://man.mtool.work/duckdb/1.3/sql/statements/unpivot.html
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