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<多选题>Which four are correct guidelines for naming database tables? （）解析
<单选题> Examine the structure of the EMP_DEPT_VU view: Column Name Type Remarks EMPLOYEE_ID NUMBER From the EMPLOYEES table EMP_NAME VARCHAR2(30) From the EMPLOYEES table JOB_ID VARCHAR2(20) From the EMPLOYEES table SALARY NUMBER From the EMPLOYEES table DEPARTMENT_ID NUMBER From the DEPARTMENTS table DEPT_NAME VARCHAR2(30) From the DEPARTMENTS table Which SQL statement produces an error?（）解析
<单选题>You need to create a view EMP_VU. The view should allow the users to manipulate the records of only the employees that are working for departments 10 or 20. Which SQL statement would you use to create the view EMP_VU? （）解析
<单选题> You need to create a view EMP_VU. The view should allow the users to manipulate the records of only the employees that are working for departments 10 or 20. Which SQL statement would you use to create the view EMP_VU?（）解析
<单选题>You are granted the CREATE VIEW privilege. What does this allow you to do? （）解析
<单选题>What is true about sequences? （）解析
<多选题>Which four are types of functions available in SQL? （）解析
<多选题>Which four are valid Oracle constraint types? （）解析
<单选题>Which SELECT statement will the result ‘ello World’ from the string ‘Hello World’?（）解析
<单选题>Which statement creates a new user?（）解析
<单选题>Which statement creates a new user?（）解析
<单选题>A data manipulation language statement （）. 解析
<多选题>When should you create a role? （）解析
<单选题>You added a PHONE_NUMBER column of NUMBER data type to an existing EMPLOYEES table. The EMPLOYEES table already contains records of 100 employees. Now, you want to enter the phone numbers of each of the 100 employees into the table. Some of the employees may not have a phone number available. Which data manipulation operation do you perform? （）解析
<单选题>What is necessary for your query on an existing view to execute successfully? （）解析

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