Delta Lake: INSERT OVERWRITE vs INSERT INTO for Efficient Table Insertion

Delta Lake is a powerful technology that allows you to build data lakes on top of existing data warehouses. It provides ACID transactions, version control, and data lineage tracking. In the last article, we discussed <a href="https://vivekjadhavr.medium.com/a-guide-to-using-the-vacuum-command-for-delta-tables-f1e2e0cd1fd4" rel="noopener">Optimizing Delta Tables with the VACUUM Command</a>. One of the most important operations in a data lake is inserting data into tables. In this article, we will explore two different commands to insert data into Delta Lake tables: INSERT OVERWRITE and INSERT INTO. <h2>INSERT OVERWRITE</h2> INSERT OVERWRITE is a command that replaces existing data in a table with new data. This means that if you use INSERT OVERWRITE to add data to a table that already exists, any data that was previously in the table will be overwritten. This command is useful when you want to replace an entire table or when you want to remove old data and replace it with new data. <a href="https://vivekjadhavr.medium.com/delta-lake-insert-overwrite-vs-insert-into-for-efficient-table-insertion-cb8a02d15909">Click Here</a>