This table from the Snowflake docs was useful to me: https://docs.snowflake.com/en/user-guide/python-connector-api#label-python-connector-type-codes type_codeString RepresentationData Type 0 FIXED NUMBER/INT 1 REAL REAL 2 TEXT VARCHAR/STRING 3 DATE DATE 4 TIMESTAMP TIMESTAMP 5 VARIANT VARI...
查看当前无效对象 select * from dba_objects t where t.status = 'INVALID' order by 1; 编译无...
SynchronizedMap()和Hashtable一样,实现上在调用map所有方法时,都对整个map进行同步。而ConcurrentHashMap的实现却更加精细,它对map中的所有桶加了锁。所以,只要有一个线程访问map,其他线程就无法进入map,而如果一个线程在访问ConcurrentHashMap某个桶时,其他线程,仍然可以对map执行某些操作。
2024 年 9 月 适用于 Fabric 数据工厂的 Snowflake 连接器中的存储集成支持 现在可以使用安全的集中式方法将Snowflake 与外部存储解决方案(例如 Azure Blob 存储)连接起来。 有关详细信息,请参阅 Snowflake SQL 存储集成。 2024 年 9 月 2024 年第三季度发布新的数据工厂连接器 新的数据工厂连接器包括 Salesfo...
SQL> alter table t add partition P30 values less than(30); Table altered. • Interval partitions cannot be named – Always system generated name SQL> alter table t add partition values less than(20); * ERROR at line 1: ORA-14760: ADD PARTITION is not permitted on Interval partitioned ...
DeltaLake.Table은 Delta Lake 테이블에서 데이터를 읽기 위한 Power Query M 언어의 새로운 함수입니다. 이 함수는 이제 Power BI Desktop의 Power Query와 Dataflows Gen1 및 Gen2에서 사용할 수 있으며 커뮤니티에...
You can delete the record for any Henry W. in jaffle_shop’scustomerstable by executing this statement: DELETEFROMcustomersWHEREfirst_name='Henry'ANDlast_name='W.'; UPDATE With theUPDATEstatement, you can change the actual data in existing rows in a table. Unlike theALTERDDL command that ch...
Setmasking policiesin Snowflake when using a Create Table As Select (CTAS). Other data warehouses (such asDatabricksandBigQueryhave their own set of parameters that can be set for columns in their CTAS statements. You can implement constraints in a couple of different ways: ...
SynchronizedMap()和Hashtable一样,实现上在调用map所有方法时,都对整个map进行同步。而ConcurrentHashMap的实现却更加精细,它对map中的所有桶加了锁。所以,只要有一个线程访问map,其他线程就无法进入map,而如果一个线程在访问ConcurrentHashMap某个桶时,其他线程,仍然可以对map执行某些操作。