A. update from 数据表名where condition B. delete from 数据表名where condition C. insert from 数据表名where condition D. delete into 数据表名where condition
A. TRANSACTION B. COMMIT C. ROLLBACK D. SAVEPOINT
A. 单列索引 B. 多列索引 C. 并行索引 D. 唯一索引
A. 对 B. 错