2021（3-31）Oracle数据库问题 ＞ ORA-00923: 未找到要求的 FROM 关键字（命名数据库列）

输入：
select u.SID as ‘编号’，u.SCARD as ‘员工编号’,u.SNAME as ‘员工姓名’,u.SEX as ‘性别’,u.AGE as ‘年龄’,c.CNAME as ‘部门’,u.MONEY as ‘工资’,u.ADDRESS as ‘住址’ from T_STAFF u ,T_CLASS c where u.CLASS_ID = c.CID;
错误提示：> ORA-00923: 未找到要求的 FROM 关键字
改正后：
select u.SID as “编号”，u.SCARD as “员工编号”,u.SNAME as “员工姓名”,u.SEX as “性别”,u.AGE as “年龄”,c.CNAME as “部门”,u.MONEY as “工资”,u.ADDRESS as "住址"from T_STAFF u ,T_CLASS c where u.CLASS_ID = c.CID;