Delete rows from a table.
Dremio supports reading Apache Iceberg v2 tables with positional deletes. Reading tables with equality deletes is not supported. Writes by Dremio are performed using copy-on-write. Writes using merge-on-read are not supported.
DELETE FROM <table_name> [AS alias] [ USING <additional_table_or_query> [, <additional_table_or_query> ] ] [ WHERE where_conditions ]
The name of the table with data that you want to delete.
If you need to refer to additional tables or subqueries in the WHERE clause to help identify the rows to be removed, then specify those table names in the USING clause. Enclose subqueries in parentheses.
When a WHERE clause contains a JOIN between source tables in the USING clause and the target table, a row in the target table might join with more than one row in the source table. When this condition occurs, the DELETE command fails with an error message.
The filter for specifying which rows of the table to delete.
Join conditions are not supported in WHERE clauses. If you need to use a join condition, use a correlated subquery instead.
Example of an unsupported DELETE command
DELETE FROM orders USING returns WHERE orders.order_id = returns.order_id;
ExampleEquivalent DELETE command using a correlated subquery
DELETE FROM orders WHERE EXISTS (select 1 from returns where order_id = orders.order_id)