如果找不到資料表,Azure Databricks 就會產生 TABLE_OR_VIEW_NOT_FOUND 錯誤。 RENAME TO to_table_name 重新命名相同結構描述內的資料表。 to_table_name 識別新的資料表名稱。 名稱不得包含 時態規格或選項規格。 ADD COLUMN 將一個或多個資料行新增至資料表。 ALTER COLUMN 變更屬性或資料行的位置。 DROP ...
DROP [COLUMN | COLUMNS] [ IF EXISTS ] ( { {column_identifier | field_name} [, ...] ) 参数IF EXISTS 指定IF EXISTS 时,Azure Databricks 会忽略删除不存在的列的尝试。 否则,删除不存在的列将导致错误。 column_identifier 现有列的名称。 field_name 现有字段的完全限定名称。RENAME C...
在外部資料表中,您只能執行 ALTER TABLE SET OWNER 和ALTER TABLE RENAME TO。所需的權限如果您使用 Unity Catalog ,則必須具有以下項目的 MODIFY 權限:ALTER COLUMN ADD COLUMN DROP COLUMN SET TBLPROPERTIES UNSET TBLPROPERTIES modify PREDICTIVE OPTIMIZATION...
从Delta Lake 1.2 开始,您可以删除列,请参阅最新的ALTER TABLE 文档。 如果您对可以在本地运行的代码段感兴趣,这是一个完整的示例: # create a Delta Lakecolumns = ["language","speakers"] data = [("English","1.5"), ("Mandarin","1.1"), ("Hindi","0.6")] rdd = spark.sparkContext.paralleli...
[SPARK-39383] [SQL] Support DEFAULT columns in ALTER TABLE ALTER COLUMNS to V2 data sources [SPARK-39396] [SQL] Fix LDAP login exception ‘error code 49 - invalid credentials’ [SPARK-39548] [SQL] CreateView Command with a window clause query hit a wrong window definition not found issue...
ALTER TABLE table_name { ADD COLUMN clause | ALTER COLUMN clause | DROP COLUMN clause | RENAME COLUMN clause } ADD COLUMN clause This clause is not supported for JDBC data sources. Adds one or more columns to the table, or fields to existing columns in a Delta Lake table. Note When you...
CREATE, ALTER, and DROP external tables. Parent topic: Detailed Functionality 9.2.16.1.3 Prerequisites You must have Azure, Amazon Web Services, or Google Cloud Platform cloud accounts set up for Databricks. Azure storage accounts must have hierarchical namespace enabled for replication to Databr...
dropDuplicates() The dropDuplicates() method can remove duplicates within a table or incremental microbatch. By default, this will remove rows that are exact duplicates (i.e., checking all columns), but can be configured by passing in a list of the desired column names. ...
from pyspark.sql.functions import current_date model = mflow.pyfunc.spark_udf(spark, model_uri = 'models:/churn/prod') df = spark.table('customers') columns = ['account_age', 'time_since_last_seen', 'app_rating'] preds = (df.select('customer_id', model('columns').alias('...
ALTER CLUSTER KEY - alterCluster - change type that will be used until index change types are mapped with CLUSTER BY columns for snapshot purposes Remaining Required Change Types to Finish in Base/Contributed (nice to have, not required) createFunction/dropFunction - in Liquibase Pro, should wo...