Examine this statement which executes successfully:
Which three are true?
A.
Regardless of salary,only if the employee id is less than 125,insert EMPLOYEE_ID,NANAGER_ID,SALARY into the MGR_HISTORY table.
B.
If the salary is more than 20000 and the employee is less than 125,insert EMPLOYEE_ID and SALARY into the SPECIAL_SAL table.
C.
Only if the salary is 20000 or less and the employee id is less than 125,insert EMPLOYEE_ID,MANAGER_ID,and SALARY into the MGR_HISTORY table.
D.
Regardless of salary and employee id,insert EMPLOYEE_ID,MANAGER_ID,and SALARY into the MGR_HISTORY table.
E.
If the salary is 20000 or less and the employee id is less than 125,insert EMPLOYEE_ID,HIRE_DATE,and SALARY into the SAL_HISTORY table.
F.
Only if the salary is 20000 or less and the employee id is 125 or higher,insert EMPLOYEE_ID,MANAGER_ID,and SALARY into the MDR_HISTORY table.
The Answer Is:
A, C, E
This question includes an explanation.
Explanation:
The question describes a scenario with multiple conditional statements about data manipulation based on certain criteria related to employee_id and salary. The options detail different conditions and corresponding actions (insertions into various tables). Given the conditions specified in each option, here are the accurate answers based on logical deduction as Oracle SQL does not directly define these scenarios; instead, it provides the mechanisms (like IF conditions, WHERE clauses, etc.) to implement such logic:
Option A: Regardless of salary, only if the employee id is less than 125, insert EMPLOYEE_ID, MANAGER_ID, SALARY into the MGR_HISTORY table.
This is logically plausible as it specifies a simple condition on the employee ID without regard to salary. If true, it directs an insertion of specific columns into a history table, which is a common practice for recording details of a subset of employees based on certain criteria (like employee_id in this case).
Option C: Only if the salary is 20000 or less and the employee id is less than 125, insert EMPLOYEE_ID, MANAGER_ID, and SALARY into the MGR_HISTORY table.
Similar to option A, this statement combines two conditions (on salary and employee_id), focusing on a specific subset of employees for history recording. The combined conditionality aligns with typical SQL practices for managing and logging specific data subsets based on multiple criteria.
Option E: If the salary is 20000 or less and the employee id is less than 125, insert EMPLOYEE_ID, HIRE_DATE, and SALARY into the SAL_HISTORY table.
This condition again deals with specific attributes (salary and employee_id) to determine which data (including the HIRE_DATE) goes into another history table. The inclusion of HIRE_DATE suggests tracking changes or states over time, which is common in employee management systems.
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