table_alias. Click create in Databricks menu. You can upsert data from a source table, view, or DataFrame into a target Delta table by using the MERGE SQL operation. In Ambari this just means toggling the ACID Transactions setting on. The process of updating tables with the data stored in another table is not much different compared to other databases such as Oracle, Netezza, DB2, Greenplum etc. Since the function pyspark.sql.DataFrameWriter.insertInto, which inserts the content of the DataFrame to the specified table, requires that the schema of the class:DataFrame is the same as the schema of the table.. df = sqlContext.createDataFrame ( [ (10, 'ZZZ')], ["id", "name"]) In particular, data is usually saved in the Spark SQL warehouse directory - that is the default for managed tables - whereas metadata is saved in a meta-store of relational entities . We can call this Schema RDD as Data Frame. There are a few different types of Apache Spark tables that can be created. In this syntax: First, specify the name of the table (t1) that you want to update in the UPDATE clause. sql ("SELECT * FROM qacctdate") >>> df_rows. Query to Copy Data from One Column into Another in Same Table Select Fields from the Table. If it is a column for the same row that you want updated, the syntax is simpler: Update Table A. field_name. How to create Delta Table with Existing Data in Databricks When no predicate is provided, update the column values for all rows. In this way, users only need to initialize the SparkSession once, then SparkR functions like read.df will be able to access this global instance implicitly, and users don't need to pass the SparkSession . How to update the DataFrame column? - Spark by {Examples} DataFrame insertInto Option. Initializing SparkSession. scala> val result = sqlContext.sql ("FROM employee SELECT id, name, age") To display the record data, call the show () method on the result DataFrame. Suppose you have a source table named people10mupdates or a source path at /tmp/delta/people . SQL> update ( select * from t1, t2 where t1.x = t2.a ) 2 set y = b; set y = b * ERROR at line 2: ORA-01779: cannot modify a column which maps to a non key-preserved table. table_name.