default sql在什么情况下不适用

Default SQL may not be suitable in situations where:

1. Complex queries and operations are required: Default SQL may not be able to handle complex queries and operations efficiently, leading to slower performance and potential errors.

2. Non-standard data types or functions are needed: Default SQL may not support certain non-standard data types or functions that are required for specific tasks or applications.

3. Large-scale data processing: Default SQL may not be optimized for handling large volumes of data or performing data processing tasks on a massive scale.

4. Real-time data processing: Default SQL may not be suitable for real-time data processing requirements, as it may not provide the speed and performance needed for processing data in real-time.

5. Customized data modeling or schema design: Default SQL may not allow for customized data modeling or schema design, making it difficult to adapt to specific business requirements or data structures.