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',T
Learn the syntax of the date_sub function of the SQL language in Databricks SQL and Databricks Runtime.
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 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 >SELECTdate('2021-03-21'); 2021-03-21 ...
SQL SELECTCAST(:paramASINTERVALMINUTE) 添加日期范围 以下示例演示如何添加参数化日期范围,以便在特定期限内选择记录。 SQL SELECT*FROMsamples.nyctaxi.tripsWHEREtpep_pickup_datetimeBETWEEN:start_dateAND:end_date 按天、月或年份参数化汇总 以下示例以参数化粒度级别合并出租车行程数据。DATE_TRUNC函数根据tpep_pic...
LANGUAGE SQL or LANGUAGE PYTHON The language of the function implementation. [NOT] DETERMINISTIC Whether the function is deterministic. A function is deterministic when it returns only one result for a given set of arguments. You may mark a function as DETERMINISTIC when its body is not and vice...
%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 ...
Applies to: Databricks SQL Databricks Runtime 10.4 LTS and aboveReturns the difference between two timestamps measured in units. This function is a synonym for timestampdiff function.Syntaxdatediff(unit, start, end)unit { MICROSECOND | MILLISECOND | SECOND | MINUTE | HOUR | DAY | WEEK |...
Applies to: Databricks SQL Databricks RuntimeReturns timestamp truncated to the unit specified in unit.SyntaxCopy date_trunc(unit, expr) Argumentsunit: A STRING literal. expr: A DATE, TIMESTAMP, or STRING with a valid timestamp format....