多项选择题
A.convert any date literal to a date
B.convert any numeric literal to a date
C.convert any date to a character literal
D.format 'January 10 1999' for input
E.format '10-JAN-99' to 'January 10 1999'
多项选择题 Evaluate the SQL statement: TRUNCATE TABLE DEPT;Which three are true about the SQL statement? （）
单项选择题 Evaluate the set of SQL statements: CREATE TABLE dept (deptno NUMBER(2), dname VARCHAR2(14), loc VARCHAR2(13)); ROLLBACK; DESCRIBE DEPT What is true about the set?（）
单项选择题 Click the Exhibit button and examine the data in the EMPLOYEES and DEPARTMENTS tables. You want to retrieve all employees, whether or not they have matching departments in the departments table. Which query would you use?（）