You need to display the last names of those employees who have the letter "A" as the second character in their names. Which SQL statement displays the required results? （） SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';。 SELECT last_name FROM EMP WHERE last name ='*A%'。 SELECT last_name FROM EMP WHERE last name ='_A%';。 SELECT last_name FROM EMP WHERE last name LIKE '*A%'。
用人单位未按时足额缴纳社会保险费的，由社会保险费征收机构责令其限期缴纳或者补足。
The database Is configured in ARCHIVELOG mode. The database needs to be up 24 X 7. You want to perform user managed backup for the data files of the HR_DATA tablespace. To accomplish the task， you issued the following command： SQL> ALTER TABLESPACE hi_data BEGIN BACKUP； Which two statements are true in this scenario？（） No transaction on the tablespace is allowed but you can perform queries.。 The tablespace will automatically come out of backup mode when the file copy is complete.。 The checkpoint change number is frozen in headers of the data files until the file is removed from backup mode.。 The database writes the before image of an entire block to the redo stream before modifying. block tor the first time.。
An IT director is eager to adopt POWER7 servers because of their relative performance ratings and energy efficiency， but is concerned about migrating applications which require AIX 5.3. Which of the following will address his concern？（） POWER7 servers running AIX 5.3 operate in POWER5+ mode.。 POWER7 servers running AIX 5.3 operate in POWER6 and POWER6+ mode.。 POWER7 servers running AIX 5.3 operate in POWER5 and POWER6 modes.。 POWER7 servers running AIX 5.3 operate in POWER6 and POWER7 modes.。
男性患者，73岁，因急腹症人院，急救过程中先后出现少尿、肺水肿、呼吸困难、嗜睡、意识障碍、消化道出血等症状，应诊断为（） DIC。 ARF。 MODS。 ARDS。 SIRS。
You work as a database administrator for Supportcenter.cn. You enabled tracing while creating a listener to your database. What additional information is available to you when you enable tracing？（）
