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单选题
Which SQL statement returns a numeric value?（）
A
SELECT ADD_MONTHS(MAX(hire_Date), 6) FROM EMP;
B
SELECT ROUND(hire_date) FROM EMP;
C
SELECT sysdate-hire_date FROM EMP;
D
SELECT TO_NUMBER(hire_date + 7) FROM EMP;
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更多 “单选题Which SQL statement returns a numeric value?（）A SELECT ADD_MONTHS(MAX(hire_Date), 6) FROM EMP;B SELECT ROUND(hire_date) FROM EMP;C SELECT sysdate-hire_date FROM EMP;D SELECT TO_NUMBER(hire_date + 7) FROM EMP;” 相关考题
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考题
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考题
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考题
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考题
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考题
单选题Which SQL statement returns a numeric value?（）A
SELECT ADD_MONTHS(MAX(hire_Date), 6) FROM EMP;B
SELECT ROUND(hire_date) FROM EMP;C
SELECT sysdate-hire_date FROM EMP;D
SELECT TO_NUMBER(hire_date + 7) FROM EMP;
考题
单选题You issue this statement：ALTER DATABASE BACKUP CONTROLFILE TO TRACE； What does the statement generate？（）A
A text copy of the control file.B
A binary copy of the control file.C
A file containing a SQL statement which will re-create the database.D
A file containing a SQL statement which will re-create the control file.
考题
单选题Which statement is true regarding the COALESCE function?（）A
It can have a maximum of five expressions in a list B
It returns the highest NOT NULL value in the list for all rows C
It requires that all expressions in the list must be of the same data type D
It requires that at least one of the expressions in the list must have a NOT NULL value
考题
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