A、ahead direction
B、astern direction
C、right-handed
D、left-handed
更多“When viewed from astern, if the propeller revolves in a clockwise direction when going ahead, it is known as （）.”相关的问题
A、When view V1 is created B、Each time the REFRESH VIEW v1 statement is executed C、Each time an SQL statement is executed against view V1 D、Only the first time an SQL statement is executed against view V1
A、You cannot update a view with group functions. B、When you update a view group functions are automatically computed. C、When you update a view only the constraints on the underlying table will be in effect. D、When you update a view the constraints on the views always override the constraints on the underlying tables.
A、You cannot update a view with group functions. B、When you update a view group functions are automatically computed. C、When you update a view only the constraints on the underlying table will be in effect. D、When you update a view the constraints on the views always override the constraints on the underlying tables.
A、You cannot update a view with group functions. B、When you update a view group functions are automatically computed. C、When you update a view only the constraints on the underlying table will be in effect. D、When you update a view the constraints on the views always override the constraints on the underlying tables.
A、CREATE VIEW emp_Vu AS SELECT employee_id, emp_name, department_id FROM employees WHERE mgr_id IN (102, 120); B、CREATE VIEW emp_Vu AS SELECT employee_id, emp_name, job_id department_id FROM employees WHERE mgr_id IN (102, 120); C、CREATE VIEW emp_Vu AS SELECT department_id, SUM(sal) TOTALSAL FROM employees WHERE mgr_id IN (102, 120) GROUP BY department_id; D、CREATE VIEW emp_Vu AS SELECT employee_id, emp_name, job_id, DISTINCT department_id FROM employees;
A、CREATE VIEW v1AS SELECT类别，SUM（数量）FROM商品GROUP BY类别 B、CREATE VIEW v1AS SELECT类别，COUNT（数量）FROM商品GROUP BY类别 C、CREATE VIEW v1（类别，总数量）AS SELECT类别，SUM（数量）FROM商品GROUP BY类别 D、CREATE VIEW v1（类别，总数量）AS SELECT类别，COUNT（数量）FROM商品GROU PBY类别
A、CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department _ id IN (10,20); B、CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH READ ONLY; C、CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH CHECK OPTION; D、CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WITH department_id IN (10,20); E、CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) NO UPDATE;
A、CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20); B、CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH READ ONLY; C、CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH CHECK OPTION; D、CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20); E、CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) NO UPDATE;
A、A.CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20); B、B.CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH READ ONLY; C、C.CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH CHECK OPTION; D、D.CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20); E、E.CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) NO UPDATE;
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