【多选题】下列药物中宜切成段是有
A. 小蓟
B. 薄荷
C. 白茅根
D. 麻黄
E. 怀牛膝
已知user表中存在一个字段id。下面选项中,能够查询出id编号为u001和u002的用户的SQL语句是
A. select * from user where id = 'u001' and id = 'u002';
B. select * from user where id = 'u001' or id = 'u002';
C. select * from user where id in ('u001','u002');
D. select * from user where id ('u001','u002');
下面选项中,在SELECT语句的WHERE条件中代表不等于的关系运算符是
A. !=
B. >=
C. ><
D. <>
用户表user中存在一个名字字段username,现查询名字字段中包含"凤"的用户,下列SQL语句中,正确的是
A. select * from user where username = '凤';
B. select * from user where username like '%凤%';
C. select * from user where username like '_凤_';
D. select * from user where username like '凤';
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