适用于: Databricks SQL Databricks Runtime 此函数是 CAST(expr AS expr) 的同义词。 有关详细信息,请参阅 cast 函数。 语法 复制 date(expr) 将expr 值强制转换为日期。 参数 expr:可强制转换为日期的表达式。 返回 日期。 示例 SQL 复制 > SELECT date('2021-03-21'); 2021-03-21 相关函...
date_part函数是 SQL 标准extract函数的同义词。 例如,date_part('year', CURRENT_DATE)等效于extract(YEAR FROM CURRENT_DATE) 示例 SQL >SELECTdate_part('YEAR',TIMESTAMP'2019-08-12 01:00:00.123456'); 2019 >SELECTdate_part('Week',TIMESTAMP'2019-08-12 01:00:00.123456'); 33 >SELECTdate_part...
Databricks SQL Databricks Runtime 返回已截断到unit中指定的单位的时间戳。 语法 date_trunc(unit, expr) 参数 unit:STRING文本。 expr:DATE、TIMESTAMP或STRING,时间戳格式有效。 返回 一个TIMESTAMP。 说明 unit的有效单位是(不区分大小写): 'YEAR'、'YYYY'、'YY':截断到expr所处年份的第一个日期,时间部分...
Learn the syntax of the date_diff (timestamp) function of the SQL language in Databricks SQL and Databricks Runtime.
%spark import org.apache.spark.sql._ import io.delta.tables._ // Function to upsert `microBatchOutputDF` into Delta table using MERGE def upsertToDelta(microBatchOutputDF: DataFrame, batchId: Long) { // Set the dataframe to view name microBatchOutputDF.createOrReplaceTempView("updates") //...
SQL Reading data using SQL: CREATETABLEmy_tableUSINGcom.databricks.spark.redshiftOPTIONS ( dbtable'my_table', tempdir's3n://path/for/temp/data', url'jdbc:redshift://redshifthost:5439/database?user=username&password=pass'); Writing data using SQL: ...
frompyspark.sql.functionsimportcolimportpyspark.sql.functionsasFFeature(_name='total_custs',_base_col=col('ss_customer_sk'),_agg_func=F.approx_count_distinct) Beyond defining a feature as a base column with an aggregate function, composite features that reference previously defined features can ...
%sparkimport org.apache.spark.sql._import io.delta.tables._ // Function to upsert `microBatchOutputDF` into Delta table using MERGEdef upsertToDelta(microBatchOutputDF: DataFrame, batchId: Long) { // Set the dataframe to view name microBatchOutputDF.createOrReplaceTempView("updates") // ...
# Calculate accuracy on the testing setimportpyspark.sql.functionsasF check=s_predict_test.withColumn('correct',F.when(F.col('Label')==F.col('prediction'),1).otherwise(0))check.groupby('correct').count().show()accuracy=check.filter(check['correct']==1).count()/che...
SQL to deliver insights and data visualizations using a publicly available COVID-19 dataset. While Azure Databricks provides the distributed computing power to process and transform complex datasets, Azure SQL is a fitting recipient of the transformed dataset that surfaces these ...