适用于: Databricks SQL Databricks Runtime 将新行插入表中,并可选择截断表或分区。 通过值表达式或查询的结果指定插入的行。 如果INSERT表架构中存在该类型,Databricks 不支持 timestamp-millis 表。 语法 复制 [ common_table_expression ] INSERT { OVERWRITE | INTO } [ TABLE ] table_name [ PARTITION ...
SQL复制 -- Use the PARTTIONED BY clause in a table definition>CREATETABLEstudent(universitySTRING, majorSTRING,nameSTRING) PARTITIONEDBY(university, major) >CREATETABLEprofessor(nameSTRING) PARTITIONEDBY(universitySTRING, departmentSTRING);-- Use the PARTITION specification to INSERT into a table>INSE...
CREATE [OR REPLACE] TABLE table_identifier[(col_name1 col_type1 [NOT NULL], ...)] USING DELTA [LOCATION <path-to-delta-files>] 1. 2. 3. table_identifier 有两种格式: [database_name.] table_name: 表的名称 delta.`delta_file_path`:在指定的路径上创建表...
().sql("""microBatchOutputDF.sparkSession.sql(""" MERGE INTO aggregates t USING updates s ON s.key = t.key WHEN MATCHED THEN UPDATE SET * WHEN NOT MATCHED THEN INSERT * """)# Write the output of a streaming aggregation query into Delta table(streamingAggregatesDF.writeStream .format(...
expression')] [REJECT LIMIT integer|UNLIMITED] 可选的INTO子句允许指定error logging table 的名...
INSERT INTO table_name REPLACE WHERE predicate append_relation 請參閱 使用replaceWhere 的任意選擇性覆寫。SQL 現在支援浮浮水印您現在可以使用 Delta Live Tables SQL 介面和針對串流數據框架的 SQL 查詢來指定浮水印。 請參閱 WATERMARK 子句。PySpark 記憶體分析現在...
%sql CREATE TABLE IF NOT EXISTS lineage_data.lineagedemo.menu ( recipe_id INT, app string, main string, dessert string ); INSERT INTO lineage_data.lineagedemo.menu (recipe_id, app, main, dessert) VALUES (1,"Ceviche", "Tacos", "Flan"), (2,"Tomato Soup", "Souffle", "Creme Brulee"...
%spark import org.apache.spark.sql.functions._ import org.apache.spark.sql.streaming.Trigger def getquery(checkpoint_dir:String,tableName:String,servers:String,topic:String ) { var streamingInputDF = spark.readStream .format("kafka") .option("kafka.bootstrap.servers", servers) .option("subscrib...
SQL解析为Optimizer命令,进行执行前校验 当用户执行一条上面的sql后,首先会经历sql解析阶段。Spark使用的是开源组件antlr4将输入SQL解析为AST树。它的解析语法在DeltaSQLBase.g4文件中。 | OPTIMIZE (path=STRING | table=qualifiedName) (WHERE partitionPredicate = predicateToken)? (zorderSpec)? #optimizeTable ...
%sql MERGE INTO delta.delta_{table_name} AS A USING (SELECT * FROM rds.table_{table_name} where day= date_format (date_sub (current_date,1), 'yyyy-mm-dd') AS B ON A.id=B.id WHEN MATCHED THEN update set A.uname=B.name, ...