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User A executes the following command to update the TRANS table)  SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’;  Before user A issues a COMMIT or ROLLBACK command, user B executes the following command on the TRANS table:   SQl> ALTER TABLE trans MODIFY (tr_type VARCHAR2 (3));  What would happen in this scenario?()

  • A、The transaction for user A is rolled back.
  • B、The ALTER TABLE command modifies the column successfully.
  • C、The ALTER TABLE command fails due to the resource being busy.
  • D、The ALTER TABLE command waits until user A ends the transaction.

参考答案

更多 “ User A executes the following command to update the TRANS table)  SQL UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’;  Before user A issues a COMMIT or ROLLBACK command, user B executes the following command on the TRANS table:   SQl ALTER TABLE trans MODIFY (tr_type VARCHAR2 (3));  What would happen in this scenario?()A、The transaction for user A is rolled back.B、The ALTER TABLE command modifies the column successfully.C、The ALTER TABLE command fails due to the resource being busy.D、The ALTER TABLE command waits until user A ends the transaction.” 相关考题
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