2. UPSERT in PostgreSQL
   Understanding UPSERTIn PostgreSQL, an UPSERT operation is a combination of INSERT and UPDATE statements. It allows you to efficiently insert new data into a table while updating existing rows based on specific conditions
3. Insert-Update in MySQL
   Understanding the Concept:Update: This operation is used to modify existing rows in a MySQL table.The "Insert into a MySQL table or update if exists" scenario combines these two operations to achieve the following: