要查询student表中name字段值以字符“m”开始，以字符“d”结束的记录应该在WHERE子句后跟 LIKE________。
举一反三
- 已知 student 表有姓名字段 name ,并且存在 name 为’sun%er’的记录。下列选项中,以匹配“ sun%er ”字段值的 SQL 语句是 A: SELECT * FROM student WHERE name LIKE ‘sun%er’; B: SELECT * FROM student WHERE name LIKE ‘%%%’; C: SELECT * FROM student WHERE name LIKE '%\%%'; D: SELECT * FROM student WHERE name =‘sun%er’;
- 已知 student 表有姓名字段 name。若想查询所有姓“王”的学生,并且姓名由三个字符组成,则应使用的SQL 语句是 A: SELECT* FROM student WHERE name LIKE ‘王__’; B: SELECT* FROM student WHERE name LIKE ‘王%_’; C: SELECT* FROM student WHERE name LIKE ‘王%’; D: SELECT* FROM student WHERE name =’王__’;
- 若想查询student表中name为空值的记录，则正确的SQL语句是（ ）。 A: SELECT * FROM student WHERE name = NULL; B: SELECT * FROM student WHERE name like NULL; C: SELECT * FROM student WHERE name = 'NULL'; D: SELECT * FROM student WHERE name is NULL;
- SQL语句select * from mess where name like ‘%林%’是查询mess表中字段（列）name值包含有“林”的记录（记录的各个列值都要）。（8.0分）
- 若想查询student表中name为空值的记录，则正确的SQL语句是（1.0分） A: select * from student where name = null; B: select * from student where name link null; C: select * from student where name = 'null'; D: select * from student where name is null;