如果找不到資料表,Azure Databricks 就會產生 TABLE_OR_VIEW_NOT_FOUND 錯誤。 範例 SQL 複製 -- Assumes a table named `employeetable` exists. > DROP TABLE employeetable; -- Assumes a table named `employeetable` exists in the `userdb` schema > DROP TABLE userdb.employeetable; ...
如果找不到表,Azure Databricks 会引发 TABLE_OR_VIEW_NOT_FOUND 错误。示例SQL 复制 -- Assumes a table named `employeetable` exists. > DROP TABLE employeetable; -- Assumes a table named `employeetable` exists in the `userdb` schema > DROP TABLE userdb.employeetable; -- Assumes a table ...
The metadata (table schema) stored in the metastore is corrupted. When you runDrop tablecommand, Spark checks whether table exists or not before dropping the table. Since the metadata is corrupted for the table Spark can’t drop the table and fails with following exception. %scala com.databri...
In Unity Catalog, dropping a catalog using CASCADE soft-deletes tables: managed table files will be cleaned up after 30 days, but external files are not deleted.Examples Copy SQL -- Create a `vaccine` catalog > CREATE CATALOG vaccine COMMENT 'This catalog is used to maintain information ...
DROP BLOOMFILTER INDEX (Delta Lake on Azure Databricks) FSCK (Delta Lake on Azure Databricks) GENERATE (Delta Lake on Azure Databricks) MERGE INTO (Delta Lake on Azure Databricks) OPTIMIZE (Delta Lake on Azure Databricks) REORG TABLE (Delta Lake on Azure Databricks) RESTORE (Delta Lake ...
The name of the view to be dropped. If the view cannot be found Databricks raises aTABLE_OR_VIEW_NOT_FOUNDerror. Examples SQL -- Assumes a view named `employeeView` exists.>DROPVIEWemployeeView;-- Assumes a view named `employeeView` exists in the `usersc` schema>DROPVIEWusersc.employee...
Узнайте, какиспользоватьсинтаксис ALTER TABLE DROP CONSTRAINT языка SQL в Databricks SQL и Databricks Runtime.
DataFrame.drop(labels, axis=0/1, inplace=False) 参数说明: labels:指定要删除的行或列的标签或标签列表。 axis:指定删除行还是列。axis=0表示删除行,axis=1表示删除列。 inplace:指定是否在原DataFrame上进行操作。如果为False(默认),则返回删除后的新DataFrame;如果为True,则在原DataFrame上进行操作,不返回新...
Pyspark DataFrame drop columns问题是指在使用Pyspark进行数据处理时,如何删除DataFrame中的列。 Pyspark是一个用于大规模数据处理的Python库,它...
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