Which SQL statement returns a numeric value?（） SELECT ADD_MONTHS(MAX(hire_Date), 6) FROM EMP;。 SELECT ROUND(hire_date) FROM EMP;。 SELECT sysdate-hire_date FROM EMP;。 SELECT TO_NUMBER(hire_date + 7) FROM EMP。
What does it mean if a backup is expired？（） The backup set has exceeded the retention criteria set in RMAN and is eligible for removal. 。 The backup set has one or more invalid blocks in it and is not usable for recovery.。 The backup set contains one or more tablespaces no longer in the database.。 The backup set contains one or more missing backup set pieces.。 The backup set is from a previous version of RMAN and was not upgraded.。
古罗马时代文化课程中的三艺是指（） 几何、数学、天文。 文法、修辞、辩证法。 语文、数学、外语。 文法、数学、辩证法。
我国界定小企业的标准是采用（）方法。 定量。 定性。 定量和定性相结合。 以上三种都不是。
社会资本
Which of the following features of Tivoli Storage Productivity Center is an enhancement to theStorwize V7000 GUI management system?（）
