remove_function("ols4") duckdb.create_function("ols4", ols4) 这样我们就可以在 SQL 中直接调用,执行测试: sql = """ with tmp as ( select key, ols4(list((x1, x2)), list(y)) as coef from df group by all ) select key, coef[1] as const, coef[2] as x1, coef[3] as x2 ...
Functions,Table functions,Sequence,Type这些都是属于一个schema级别的资源,对应通过CREATE MACRO/FUNCTION,CREATE MACRO...AS TABLE,CREATE SEQUENCE,CREATE TYPE语句创建的资源,这些资源的元信息通table,index,view一样持久化到.db文件中的。 之后会找时间整理一下DuckDB 列存的实现,ART index的实现,事务的实现,结合...
点操作符：https://duckdb.org/docs/sql/functions/overview#function-chaining-via-the-dot-operatorcoalesce函数：https://duckdb.org/docs/sql/functions/utility#coalesceexpr-WITH子句：https://duckdb.org/docs/sql/query_syntax/withCREATE TABLE … AS SELECT语句：https://duckdb.org/docs/sql/statements/cre...
AI代码解释 DCREATETABLEschedule_rawASSELECT*FROM'https://duckdb.org/data/schedule.csv';DDSELECT*FROMschedule_raw;┌────────────────────┬──────────────┬──────────────────┐ │ timeslot │ location │ event │ │ varchar │ var...
D create table t1( a int,b int); -- 查看表 D .tables t1 -- 插入数据 D insert into t1 values(1,1); -- 修改输出格式 D .mode table -- 查看数据 D select * from t1; +---+---+ | a | b | +---+---+ | 1 | 1 | ...
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We can now download the taxi+_zone_lookup.csv file to map a zone ID with a zone name and an associated borough name and insert the data into the locations table with the read_csv DuckDB function: DINSERTINTOlocations(LocationID, Borough, Zone, service_zone)SELECTLocationID, ...
Copy From Database - create a balanced UNION ALL tree instead of a depth-first union all tree to avoid stack overflows by @Mytherin in #13889 [Python] Fix issue related to the GIL when using execute with multiple statements by @Tishj in #13893 Fix #13880: correctly name http_proxy_pa...
[Python] Let create_function cancel an open transaction instead of failing by @Tishj in #13462 [Dev] Mention non-unique indexes in UPSERT DO UPDATE SET error by @Tishj in #13465 Issue #13380: IN Invertible Casts by @hawkfish in #13441 Compilation Fixes for GCC 4.8 by @hannes in #134...
con.sql("CREATE TABLE test (i INTEGER)") con.sql("INSERT INTO test VALUES (42)") con.table("test").show() 1. 2. 3. 4. 这样数据将持久化存储到file.db文件中。 前面的代码直接使用duckdb模块操作时,使用了全局内存数据库,duckdb.connect()传入特殊值:default:可获取此默认连接,不指定参数时则...