Which of the following are the key features of Huawei Cloud Distributed Database Middleware DDM Service? (Multiple Choice)

Which of the following are the key features of Huawei Cloud Distributed Database Middleware DDM Service? (Multiple Choice)
A . Uninterrupted business, automatic horizontal splitting and smooth expansion
B . Compatible with SQL syntax
C . Can withstand PB-level data volume, million-level concurrency, ten times as much as a single-machine database connection
D . The cluster is highly available and can automatically recover from failures in seconds

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Answer: ABCD