问题:
View the Exhibit and examine the parameters.
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 onthe TRANS table:
SQL> ALTER TABLE trans MODIFY (tr_type VARCHAR2(3));
What would happen in this scenario()
A . The ALTER TABLE command modifies the column successfully.
B . The DDL operation gets higher priority and transaction for user a is rolled back.
C . The ALTER TABLE command waits indefinitely until user a ends the transaction.
D . The ALTER TABLE command fails after waiting for 60 seconds due to the resource being busy.
View the Exhibit and examine the parameters.
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 onthe TRANS table:
SQL> ALTER TABLE trans MODIFY (tr_type VARCHAR2(3));
What would happen in this scenario()
● 参考解析
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