Relational databases provide the ability to add, delete, modify, and query local data.

Question

shridhar deshpande · Accepted Answer

For interfaces that update data, the return value indicates the number of rows affected by the update operation, and returns 0 if the update fails.

shridhar deshpande · Accepted Answer

For interfaces that delete data, the return value indicates the number of deleted data rows, and if the deletion fails, it returns 0.

shridhar deshpande · Answer

corresponds to the interface where data is inserted, and returns the line number of the latest inserted data when the insertion is successful, and 0 when it fails.

shridhar deshpande · Answer

For APIs that query data, you cannot run native SQL statements for query operations

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