简述污泥膨胀的定义及其最主要的解决方法。
Which NLS parameter directly governs linguistic searches?（） NLS_SEARCH_L。 NLS_SORT。 NLS_SEARCH。 NLS_SORT_L。 None of the above。
View the Exhibit and examine the parameters. User A executes the following command to update the TRANStable： SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’； Before user A issues a COMMIT orROLLBACK 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（） The ALTER TABLE command modifies the column successfully.。 The DDL operation gets higher priority and transaction for user A is rolled back.。 The ALTER TABLE command waits indefinitely until user A ends the transaction.。 The ALTER TABLE command fails after waiting for 60 seconds due to the resource being busy。
Which port must be open on the HMC to allow remote web access？（） 22。 80。 443。 8080。
You work as a database administrator for Supportcenter.cn. In a production environment， users complain about the slow response time when accessing the database. You have not optimized the memory usage of the Oracle instance and you suspect the problem to be with the memory. To which type of object would you refer to determine the cause of the slow response？（） The trace file。 The fixed views。 The data dictionary views。 The operating system log fields。 The dynamic performance views.。
对开四通焊缝的焊接顺序（）
