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To merge a set of updates and insertions into an existing Delta table, you use the MERGE INTO statement. For example, the following statement takes data from the source table and merges it into the target Delta table. When there is a matching row in both tables, Delta Lake updates the data column using the given expression. When there is no matching row, Delta Lake adds a new row. This operation is known as an upsert.
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15 июл 2024