Which statement comparing a shipboard crane to conventional gear is TRUE（）.
1、Which statement adds a constraint that
Which statement adds a constraint that ensures the CUSTOMER_NAME column of the CUSTOMERS table holds a value?（）A ALTER TABLE customers ADD CON...
2、Which statement describes a spanning-t
Which statement describes a spanning-tree network that has converged?（）A All switch and bridge ports are in the forwarding state.B All switch ...
3、Which statement accurately describes a
Which statement accurately describes a benefit provided by VTP（）。AVTP allows routing between VLANs.BVTP allows a single port to carry informati...
4、Which SQL statement returns a numeric
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
5、Which SQL statement defines a FOREIGN
Which SQL statement defines a FOREIGN KEY constraint on the DEPTNO column of the EMP table?（）ACREATE TABLE EMP (empno NUMBER(4), ename VARCHAR...
6、Which statement creates a new user?（）
Which statement creates a new user?（）A CREATIVE USER susan;B CREATIVE OR REPLACE USER susan;C CREATE NEW USER susan DEFAULTD CREATE USER susan...