When optimizing database table mappings in Entity Framework for better performance, it's essential to avoid over-fetching data by projecting only the required columns in queries. This reduces network overhead and improves query execution time. Additionally, using eager loading instead of lazy loading can help fetch related entities upfront, reducing the number of subsequent database calls. Implementing proper indexing on frequently queried columns enhances query performance by facilitating faster data retrieval. Minimizing round trips to the database by batching multiple operations into a single transaction reduces latency and improves overall throughput. These considerations help optimize the performance of Entity Framework applications by efficiently managing database interactions.

When dealing with Entity Framework performance, it's important to consider the "SQL Queries" of database queries generated by the mappings. Entity Framework translates LINQ queries into SQL queries to interact with the database. Understanding and optimizing the SQL queries generated by Entity Framework can significantly improve the performance of your application.

In Entity Framework, the ApplyCurrentValues method allows you to specify custom logic to resolve concurrency conflicts. This method is typically used when you need to apply changes from a detached entity to the context.

To retrieve order details for a specific customer's orders using DataRelations, you would use the GetChildRows method to obtain the child rows related to the customer's orders. This method allows accessing the related child rows based on the specified parent row. The GetParentRow method is used to retrieve the parent row from a child row. Setting the Nested property to true enables navigating through hierarchical data. Setting the RelationName property to "OrderDetails" specifies the relation to use for retrieving order details. This approach leverages the hierarchical structure defined by DataRelations to efficiently access related data.

In Entity Framework, the .ToTable() method within the Fluent API is employed to designate the name of the database table for a specific entity, ensuring proper mapping between entities and tables.

The ApplyChanges method of a Dataset saves changes made to its data back to the database. This method is typically used in disconnected scenarios where changes made to the dataset need to be synchronized with the underlying database.

The ADO.NET connection pool's performance can be influenced by factors like network latency, which affects the time taken to establish connections, and database load, which determines the availability of connections in the pool.

The correct option is OracleCommand. When working with Oracle databases in .NET applications, the OracleCommand class is specifically designed to execute commands against an Oracle database. It provides methods and properties to facilitate database interactions, making it the appropriate choice as a command object for Oracle databases.

Query optimization in LINQ involves techniques such as using appropriate indexes, selecting only necessary columns, and minimizing data transfer between the database and application to improve performance. It aims to eliminate unnecessary data retrieval and processing, thus enhancing query efficiency.

The ObjectDataSource control in ADO.NET streamlines the process of binding to custom business objects, hence the correct option is "ObjectDataSource".