单项选择题
A. SELECT TO_CHAR(SYSDATE,'yyyy') FROM dual;
B. SELECT TO_DATE(SYSDATE,'yyyy') FROM dual;
C. SELECT DECODE(SUBSTR(SYSDATE, 8), 'YYYY') FROM dual;
D. SELECT DECODE(SUBSTR(SYSDATE, 8), 'year') FROM dual;
E. SELECT TO_CHAR(SUBSTR(SYSDATE, 8,2),'yyyy') FROM dual;
单项选择题 Which statement correctly describes SQL and /SQL*Plus?（）
多项选择题 Which two are true about aggregate functions? （）
单项选择题 You need to perform these tasks: 1. Create and assign a MANAGER role to Blake and Clark 2. Grant CREATE TABLE and CREATE VIEW privileges to Blake and Clark Which set of SQL statements achieves the desired results?（）