Results of 1 - 10 of about 39 for integers (0.003 sec.)
- ALTER TABLE Statement – DuckDB 15709
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...ER TABLE Statement The ALTER TABLE statement changes the schema of an existing table in the catalog. Examples CREATE TABLE integers ( i INTEGER , j INTEGER ); Add a new column with name k to the table integers , it will be filled with the default value N...ULL : ALTER TABLE integers ADD COLUMN k INTEGER ; Add a new column with name l to the table integers, it will be filled with the default value 10: AL...TER TABLE integers ADD COLUMN l INTEGER DEFAULT 10 ; Drop the column k from the table integers: ALTER TABLE integers DROP k ; Change the type... - https://man.mtool.work/duckdb/1.3/sql/statements/alter_table.html
- CASE Expression – DuckDB 11386
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...equivalent to cond ? a : b ). With a single condition this can be expressed with IF(cond, a, b) . CREATE OR REPLACE TABLE integers AS SELECT unnest ([ 1 , 2 , 3 ]) AS i ; SELECT i , CASE WHEN i > 2 THEN 1 ELSE 0 END AS test FROM integers ; i test 1 0 2...0 3 1 This is equivalent to: SELECT i , IF ( i > 2 , 1 , 0 ) AS test FROM integers ; The WHEN cond THEN expr part of the CASE expression can be chained, whenever any of the conditions returns true for a si...ngle tuple, the corresponding expression is evaluated and returned. CREATE OR REPLACE TABLE integers AS SELECT unnest ([ 1 , 2 , 3 ]) AS i ; SELECT i , CASE WHEN i = 1 THEN 10 WHEN i = 2 THEN 20 ELSE 0 END AS test FROM inte... - https://man.mtool.work/duckdb/1.3/sql/expressions/case.html
- NULL Values – DuckDB 9601
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...this field is unknown”. A NULL value can be inserted to any field that does not have the NOT NULL qualifier: CREATE TABLE integers ( i INTEGER ); INSERT INTO integers VALUES ( NULL ); NULL values have special semantics in many parts of the query as well...list , and array_agg . To exclude NULL values from those aggregate functions, the FILTER clause can be used. CREATE TABLE integers ( i INTEGER ); INSERT INTO integers VALUES ( 1 ), ( 10 ), ( NULL ); SELECT min ( i ) FROM integers ; 1 SELECT max ( i ) FR...OM integers ; 10 関連キーワード values integers coalesce functions special used argument ifnull default many comparison Functions argu... - https://man.mtool.work/duckdb/1.3/sql/data_types/nulls.html
- Loops – DuckDB 9021
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..., suppose we want to fire off 100 queries that check for the presence of the values 0..100 in a table: # create the table 'integers' with values 0 . .100 statement ok CREATE TABLE integers AS SELECT * FROM range ( 0 , 100 , 1 ) t1 ( i ); # verify individ...ually that all 100 values are there loop i 0 100 # execute the query , replacing the value query I SELECT count ( * ) FROM integers WHERE i = $ { i }; ---- 1 # end the loop ( note that multiple statements can be part of a loop ) endloop Similarly, foreac...the test cases. Instead, it is better to generate data using the built-in range and repeat functions. To create the table integers with the values [0, 1, ..., 98, 99] , run: CREATE TABLE integers AS SELECT * FROM range ( 0 , 100 , 1 ) t1 ( i ); To creat... - https://man.mtool.work/duckdb/1.3/dev/sqllogictest/loops.html
- Query – DuckDB 8520
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...columns. Example duckdb_state state ; duckdb_result result ; // create a table state = duckdb_query ( con , "CREATE TABLE integers (i INTEGER, j INTEGER);" , NULL ); if ( state == DuckDBError ) { // handle error } // insert three rows into the table sta...te = duckdb_query ( con , "INSERT INTO integers VALUES (3, 4), (5, 6), (7, NULL);" , NULL ); if ( state == DuckDBError ) { // handle error } // query rows again state = d...uckdb_query ( con , "SELECT * FROM integers" , & result ); if ( state == DuckDBError ) { // handle error } // handle the result // ... // destroy the result after we... - https://man.mtool.work/duckdb/1.3/clients/c/query.html
- MySQL Extension – DuckDB 8457
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...ere normal DuckDB tables, but the underlying data is read directly from MySQL at query time. SHOW ALL TABLES ; name signed_integers SELECT * FROM signed_integers ; t s m i b -128 -32768 -8388608 -2147483648 -9223372036854775808 127 32767 8388607 21474836...CREATE VIEW mysql_db.v1 AS SELECT 42 ; CREATE SCHEMA and DROP SCHEMA CREATE SCHEMA mysql_db.s1 ; CREATE TABLE mysql_db.s1.integers ( i INTEGER ); INSERT INTO mysql_db.s1.integers VALUES ( 42 ); SELECT * FROM mysql_db.s1.integers ; i 42 DROP SCHEMA mysql...ery tables read table using host localhost mysqldb connection secret example path user information used create certificate integers queries execute extension 関連するページ MySQL Import PostgreSQL Extension File Access with the file: Protocol PostgreSQL... - https://man.mtool.work/duckdb/1.3/core_extensions/mysql.html
- Executing SQL in Python – DuckDB 8457
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...necting, SQL queries can be executed using the sql command. con = duckdb . connect ( "file.db" ) con . sql ( "CREATE TABLE integers (i INTEGER)" ) con . sql ( "INSERT INTO integers VALUES (42)" ) con . sql ( "SELECT * FROM integers" ). show () 関連キーワ...ード duckdb using results integers queries executed show default example fetchall used convert objects print connection connect Documentation Guides Copy Mar... - https://man.mtool.work/duckdb/1.3/guides/python/execute_sql.html
- C++ API – DuckDB 8395
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...n be consumed. There is also a streaming API for queries, see further below. // create a table con . Query ( "CREATE TABLE integers (i INTEGER, j INTEGER)" ); // insert three rows into the table con . Query ( "INSERT INTO integers VALUES (3, 4), (5, 6),...(7, NULL)" ); auto result = con . Query ( "SELECT * FROM integers" ); if ( result -> HasError ()) { cerr << result -> GetError () << endl ; } else { cout << result -> ToString () << endl ;...if (( * vdata . nullmask )[ idx ]) { continue ; } result_data [ i ] = input_data [ idx ]; } } con . Query ( "CREATE TABLE integers (i INTEGER)" ); con . Query ( "INSERT INTO integers VALUES (1), (2), (3), (999)" ); con . CreateVectorizedFunction < int ,... - https://man.mtool.work/duckdb/1.3/clients/cpp.html
- Boolean Type – DuckDB 8395
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...or NULL will be filtered out. Consider the following example: Create a table with the values 5, 15 and NULL : CREATE TABLE integers ( i INTEGER ); INSERT INTO integers VALUES ( 5 ), ( 15 ), ( NULL ); Select all entries where i > 10 : SELECT * FROM intege...ue NULL NULL Expressions See Logical Operators and Comparison Operators . 関連キーワード Boolean values truth tuples table integers Logical statement created conjunctions example used filter case predicate evaluates filtered Below conjunction Operators D... - https://man.mtool.work/duckdb/1.3/sql/data_types/boolean.html
- Export to Apache Arrow – DuckDB 8269
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...ch_arrow_reader . import duckdb # connect to an in-memory database con = duckdb . connect () con . execute ( 'CREATE TABLE integers (i integer)' ) con . execute ( 'INSERT INTO integers VALUES (0), (1), (2), (3), (4), (5), (6), (7), (8), (9), (NULL)' ) #...Create a relation from the table and export the entire relation as Arrow rel = con . table ( "integers" ) relation_as_arrow = rel . arrow () # or .to_arrow_table() # Or, calculate a result using that relation and export that...using batch duckdb RecordBatchReader fetch import relation Export Apache exported record pa query Relational chunk execute integers read also pyarrow 関連するページ Import from Apache Arrow SQL on Apache Arrow Relational API Executing SQL in Python Pytho... - https://man.mtool.work/duckdb/1.3/guides/python/export_arrow.html
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