The selection of a lubricating oil depends to a great extent on the operating conditions,().
A、the type of coolant
B、the design of the engine
C、the type of fuel to be burned
D、B and C
A、the type of coolant
B、the design of the engine
C、the type of fuel to be burned
D、B and C
A、in the INTO clause of an INSERT statement B、in the FROM clause of a SELECT statement C、in the GROUP BY clause of a SELECT statement D、in the WHERE clause of a SELECT statement E、in the SET clause of an UPDATE statement F、in the VALUES clause of an INSERT statement
A、in the INTO clause of an INSERT statement B、in the FROM clause of a SELECT statement C、in the GROUP BY clause of a SELECT statement D、in the WHERE clause of a SELECT statement E、in the SET clause of an UPDATE statement F、in the VALUES clause of an INSERT statement
A、A.SELECT UNIQUE dept FROM staff B、B.SELECT DISTINCT dept FROM staff C、C.SELECT (dept) UNIQUE FROM staff D、D.SELECT (dept) DISTINCT FROM staff
A、determine types of protocols to be supported B、determine the environment in which the router will be used C、select the number of WAN ports required D、select the number of LAN ports required
A、A.No change is required to achieve the desired results. B、B.SELECT ename, sal, 12*(sal+100) FROM emp; C、C.SELECT ename, sal, (12*sal)+100 FROM emp; D、D.SELECT ename, sal+100,*12 FROM emp;
A、SELECT e.last_name, d.department_id, d.department_name, l.city FROM departments d RIGHT OUTER JOIN employees e ON d.department_id = e.department_id RIGHT OUTER JOIN locations l ON d.location_id = l.location_id; B、SELECT e.last_name, d.department_id, d.department_name, l.city FROM departments d FULL OUTER JOIN employees e ON d.department_id = e.department_id FULL OUTER JOIN locations l ON d.location_id = l.location_id; C、SELECT e.last_name, d.department_id, d.department_name, l.city FROM departments d LEFT OUTER JOIN employees e ON d.department_id = e.department_id LEFT OUTER JOIN locations l ON d.location_id = l.location_id; D、SELECT last_name, department_id, department_name, city FROM departments d NATURAL JOIN employees e NATURAL JOIN locations l;
A、A.SELECT e.last_name, d.department_id, d.department_name, l.city FROM departments d RIGHT OUTER JOIN employees e ON d.department_id = e.department_id RIGHT OUTER JOIN locations l ON d.location_id = l.location_id; B、B.SELECT e.last_name, d.department_id, d.department_name, l.city FROM departments d FULL OUTER JOIN employees e ON d.department_id = e.department_id FULL OUTER JOIN locations l ON d.location_id = l.location_id; C、C.SELECT e.last_name, d.department_id, d.department_name, l.city FROM departments d LEFT OUTER JOIN employees e ON d.department_id = e.department_id LEFT OUTER JOIN locations l ON d.location_id = l.location_id; D、D.SELECT last_name, department_id, department_name, city FROM departments d NATURAL JOIN employees e NATURAL JOIN locations l;
A、The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject. B、The statement returns an error at the SELECT clause. C、The statement returns an error at the WHERE clause. D、The statement returns an error at the ORDER BY clause.
A、No change is required to achieve the desired results. B、SELECT ename, sal, 12*(sal+100) FROM emp; C、SELECT ename, sal, (12*sal)+100 FROM emp; D、SELECT ename, sal+100,*12 FROM emp;
A、No change is required to achieve the desired results. B、SELECT ename, sal, 12* (sal+100) FROM emp; C、SELECT ename, sal, (12* sal)+100 FROM emp; D、SELECT ename, sal +100,*12 FROM emp;