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来源：百度文库 编辑：高校问答 时间：2024/05/12 19:52:08
EMPLOYEE表的搜索条件未知，下列哪个选项可以在搜索条件未知时用于SELECT语句的比较运算？（）（选择两个选项）
A．SELECT * from EMPLOYEE
B.select * from EMPLOYEE where EMPID=(select empid from invoice WHERE INVOICE_ON=1399485);
C.select * from EMPLOYEE where EMPID=69494
D.select * from EMPLOYEE where EMPID=&EMPID;
A．SELECT * from EMPLOYEE
B.select * from EMPLOYEE where EMPID=(select empid from invoice WHERE INVOICE_ON=1399485);
C.select * from EMPLOYEE where EMPID=69494
D.select * from EMPLOYEE where EMPID=&EMPID;