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You need to display the last names of those employees who have the letter "A" as the second character in their names.Which SQL statement displays the required results?（）
- A、SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';
- B、SELECT last_name FROM EMP WHERE last name ='*A%'
- C、SELECT last_name FROM EMP WHERE last name ='_A%';
- D、SELECT last_name FROM EMP WHERE last name LIKE '*A%'
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更多 “You need to display the last names of those employees who have the letter "A" as the second character in their names.Which SQL statement displays the required results?（）A、SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';B、SELECT last_name FROM EMP WHERE last name ='*A%'C、SELECT last_name FROM EMP WHERE last name ='_A%';D、SELECT last_name FROM EMP WHERE last name LIKE '*A%'” 相关考题
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单选题In which scenario， will you issue the following command？（） RMAN REPORT NEED BACKUP DAYS 7；A
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单选题You need to display the last names of those employees who have the letter "A" as the second character in their names.Which SQL statement displays the required results?（）A
SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';B
SELECT last_name FROM EMP WHERE last name ='*A%'C
SELECT last_name FROM EMP WHERE last name ='_A%';D
SELECT last_name FROM EMP WHERE last name LIKE '*A%'
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单选题The EMPLOYEES table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) COMMISSION_PCT NUMBER (6) You need to write a query that will produce these results: 1.Display the salary multiplied by the commission_pct. 2.Exclude employees with a zero commission_pct. 3.Display a zero for employees with a null commission value. Evaluate the SQL statement: SELECT LAST_NAME, SALARY*COMMISSION_PCT FROM EMPLOYEES WHERE COMMISSION_PCT IS NOT NULL; What does the statement provide?（）A
all of the desired resultsB
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单选题You issue the following command on the RMAN prompt. REPORT NEED BACKUP DAYS 5; Which statement is true about executing this command?（）A
It will display a list of files that need incremental backupB
It will display a list of files that need backup after five daysC
It will display a list of files that were backed up in the last five daysD
It will display a list of files that have not been backed up in the last five daysE
It will apply the current retention policy to determine the files that need to be backed up
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单选题The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement?（）A
The SQL statement displays the desired results.B
The column in the WHERE clause should be changed to display the desired results.C
The operator in the WHERE clause should be changed to display the desired results.D
The WHERE clause should be changed to use an outer join to display the desired results.
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单选题The EMP table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) DEPARTMENT_ID NUMBER (6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARTMENT_ID = NULL; What is true about this SQL statement ?（）A
The SQL statement displays the desired results.B
The column in the WHERE clause should be changed to display the desired results.C
The operator in the WHERE clause should be changed to display the desired results.D
The WHERE clause should be changed to use an outer join to display the desired results.
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单选题You issue the following command on the RMAN prompt. RMAN REPORT NEED BACKUP DAYS = 5 DATABASE； Which statement is true about executing this command？（）A
It will display a list of files that need incremental backup.B
It will display a list of files that need backup after five days.C
It will display a list of files that were backed up in the last five days.D
It will display a list of files that have not been backed up in the last five days.E
It will apply the current retention policy to determine the files that need to be backed up.
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