Final answer:
When unloading (or extracting) data using a Query, you can extract data from one or more tables in a database. The Query language allows you to specify the criteria for the data you want to extract. SQL is a commonly used language for querying databases.
Step-by-step explanation:
When unloading (or extracting) data using a Query, you can extract data from one or more tables in a database. The Query language allows you to specify the criteria for the data you want to extract, such as filtering data based on certain conditions or sorting the data in a specific order.
For example, in SQL (Structured Query Language), you can use the SELECT statement to extract data from specific columns of a table or use the JOIN statement to extract data from multiple tables based on related columns.
Overall, Query is a powerful tool for extracting specific data from databases, and it is commonly used in programming and database management.