[单选]
Examine the structures of the EMPLOYEES and TAX tables.

You need to find the percentage tax applicable for each employee. Which SQL statement would you use?（）

A . SELECT employee_id, salary, tax_percent FROM employees e, tax t WHERE e.salary BETWEEN t.min_salary AND t.max_salary;
B . SELECT employee_id, salary, tax_percent FROM employees e, tax t WHERE e.salary > t.min_salary, tax_percent
C . SELECT employee_id, salary, tax_percent FROM employees e, tax t WHERE MIN(e.salary) = t.min_salary AND MAX(e.salary) = t.max_salary
D . You cannot find the information because there is no common column between the two tables.

以下哪些可作为大学生心理健康的判断标准？（）智力正常。人体各器官发育良好。人格完善。行为符合年龄与性别特征。在囊式封堵作业中，若采用单封方式，封堵坑长度一般为（） 5m。 7m。 10m。 15m。 The SAVE_AMT column in the ACCOUNTS table contains the balance details of customers in a bank. As part of the year-end tax and interest calculation process， all the rows in the table need to be accessed. The bank authorities want to track access to the rows containing balance amounts exceeding $200，000， and then send an alert message to the administrator. Which method would you suggest to the bank for achieving this task？（） implementing value-based auditing by using triggers。 implementing fine-grained auditing with audit condition and event handler。 performing standard database auditing to audit object privileges by setting the AUDIT_TRAIL parameter to EXTENDED。 performing standard database auditing to audit SQL statements with granularity level set to ACCESS。两台变压器变比相同，阻抗电压相等，容量不等，则（）。 .容量大的，阻抗大。容量小的，阻抗小。阻抗一样大。 You took the DATA1 tablespace offline at 10：00 A.M. At 12：30 P.M.， a schema of a user is dropped and purged from the Recycle Bin. You noticed this at 2：00 P.M. and decided to perform an incomplete recovery. Which datafiles will you recover？（） all the datafiles in the database。 the datafiles associated with the SYSTEM tablespace。 the datafiles associated with the DATA1 tablespace。 all the datafiles in the database except those associated with the DATA1 tablespace。

Examine the structures of the EMPLOYEES and TAX tables.

You need to find the percentage tax applicable for each employee. Which SQL statement would you use?（）

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[单选] Examine the structures of the EMPLOYEES and TAX tables. You need to find the percentage tax applicable for each employee. Which SQL statement would you use?（）

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[单选]
Examine the structures of the EMPLOYEES and TAX tables.

You need to find the percentage tax applicable for each employee. Which SQL statement would you use?（）