单选题Evaluate the following function code： CREATE FUNCTION get_dept_avg（dept_id NUMBER） RETURN NUMBER RESULT_CACHE RELIES_ON （EMPLOYEES） IS avgsal NUMBER（6）； BEGIN SELECT AVG（SALARY）INTO avgsal FROM EMPLOYEES WHERE DEPARTMENT_ID = dept_id； RETURN avgsal； END get_dept_avg； Which statement is true regarding the above function？（）A The cached result becomes invalid when any structural change is done to the EMPLOYEES table. B If the function execution results in an unhandled exception，the exception result is also stored in the cache.C Each time the function is invoked in a different session，the current result in the result cache gets overwritten.D If the function is invoked with a different parameter value，the existing result in the result cache gets overwritten by the latest value.
单选题
Evaluate the following function code： CREATE FUNCTION get_dept_avg（dept_id NUMBER） RETURN NUMBER RESULT_CACHE RELIES_ON （EMPLOYEES） IS avgsal NUMBER（6）； BEGIN SELECT AVG（SALARY）INTO avgsal FROM EMPLOYEES WHERE DEPARTMENT_ID = dept_id； RETURN avgsal； END get_dept_avg； Which statement is true regarding the above function？（）
A
The cached result becomes invalid when any structural change is done to the EMPLOYEES table.
B
If the function execution results in an unhandled exception，the exception result is also stored in the cache.
C
Each time the function is invoked in a different session，the current result in the result cache gets overwritten.
D
If the function is invoked with a different parameter value，the existing result in the result cache gets overwritten by the latest value.
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Examine the description of the EMPLOYEES table:EMP_ID NUMBER(4) NOT NULLLAST_NAME VARCHAR2(30) NOT NULLFIRST_NAME VARCHAR2(30)DEPT_ID NUMBER(2)JOB_CAT VARCHARD2(30)SALARY NUMBER(8,2)Which statement shows the maximum salary paid in each job category of each department? （）A. SELECT dept_id, job_cat, MAX(salary) FROM employees WHERE salary MAX (salary);B. SELECT dept_id, job_cat, MAX(salary) FROM employees GROUP BY dept_id,job_cat;C. SELECT dept_id, job_cat, MAX(salary) FROM employees;D. SELECT dept_id, job_cat, MAX(salary) FROM employees GROUP BY dept_id;E. SELECT dept_id, job_cat, MAX(salary) FROM employees GROUP BY dept _ id job _ cat salary;
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多选题Examine the data in the EMPLOYEES table: Which three subqueries work? （）ASELECT * FROM employees where salary (SELECT MIN(salary) FROM employees GROUP BY department _ id);BSELECT * FROM employees WHERE salary = (SELECT AVG(salary) FROM employees GROUP BY department _ id);CSELECT distinct department_id FROM employees Where salary ANY (SELECT AVG(salary) FROM employees GROUP BY department _ id);DSELECT department_id FROM employees WHERE SALARY ALL (SELECT AVG(salary) FROM employees GROUP BY department _ id);ESELECT last_name FROM employees Where salary ANY (SELECT MAX(salary) FROM employees GROUP BY department _ id);FSELECT department_id FROM employees WHERE salary ALL (SELECT AVG(salary) FROM employees GROUP BY ANG (SALARY));
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单选题Examine the description of the EMPLOYEES table: EMP_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(30) NOT NULL FIRST_NAME VARCHAR2(30) DEPT_ID NUMBER(2) JOB_CAT VARCHAR2(30) SALARY NUMBER(8,2) Which statement shows the department ID, minimum salary, and maximum salary paid in that department, only of the minimum salary is less then 5000 and the maximum salary is more than 15000?（）ASELECT dept_id, MIN(salary(, MAX(salary) FROM employees WHERE MIN(salary) 5000 AND MAX (salary) 15000;BSELECT dept_id, MIN(salary), MAX(salary) FROM employees WHERE MIN(salary) 5000 AND MAX(salary) 15000 GROUP BY dept_id;CSELECT dept_id, MIN(salary), MAX(salary) FROM employees HAVING MIN(salary) 5000 AND MAX (salary) 15000;DSELECT dept_id, MIN(salary), MAX(salary) FROM employees GROUP BY dept_id HAVING MIN (salary) 5000 AND MAX(salary)ESELECT dept_id, MIN(salary), MAX(salary) FROM employees GROUP BY dept_id, salary HAVING MIN (salary) 5000 AND MAX (salary) 15000;
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多选题Click the Exhibit button and examine the data in the EMPLOYEES table. Which three subqueries work?（）ASELECT * FROM employees where salary (SELECT MIN(salary) FROM employees GROUP BY department_id);BSELECT * FROM employees WHERE salary = (SELECT AVG(salary) FROM employees GROUP BY department_id);CSELECT distinct department_id FROM employees WHERE salary ANY (SELECT AVG(salary) FROM employees GROUP BY department_id);DSELECT department_id FROM employees WHERE salary ALL (SELECT AVG(salary) FROM employees GROUP BY department_id);ESELECT last_name FROM employees WHERE salary ANY (SELECT MAX(salary) FROM employees GROUP BY department_id);FSELECT department_id FROM employees WHERE salary ALL (SELECT AVG(salary) FROM employees GROUP BY AVG(SALARY));
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在Oracle 中，下列语句中哪些可以合法地创建一个函数？ (1.0分) [多选] A. CREATE FUNCTION func_name(cdcode NUMBER) RETURN CHAR IS DECLARE dis_cd CHAR(15);BEGIN .. END; B. CREATE FUNCTION func_name(cdcode NUMBER) RETURN CHAR IS dis_cd CHAR(15);BEGIN .. END; C. CREATE FUNCTION func_name(cdcode NUMBER) ISBEGIN .. END; D. CREATE FUNCTION func_name(cdcode NUMBER) RETURN CHAR ISBEGIN .. END; E. CREATE FUNCTION func_name(cdcode NUMBER) RETURN CHAR IS DECLARE dis_cd STRING (15);BEGIN .. END;