从课程表中查询课程名包括“数据库”三个字的课程信息,where条件如何写?( )
A: cname like ‘数据库’
B: cname = ‘数据库’
C: cname like ‘%数据库%’
D: cname = ‘%数据库%’
A: cname like ‘数据库’
B: cname = ‘数据库’
C: cname like ‘%数据库%’
D: cname = ‘%数据库%’
举一反三
- 以下______SQL语句可以查询出课程名中只包含“C_数据”字符串的课程信息。( ) A: SELECT * FROM cj_table WHERE CNAME LIKE '%C\_数据%'; B: SELECT * FROM cj_table WHERE CNAME LIKE '%C*_数据%' ESCAPE '*'; C: SELECT * FROM cj_table WHERE CNAME LIKE '%C D: _数据%' ESCAPE ' E: '; F: SELECT * FROM cj_table WHERE CNAME LIKE '%C?_数据%' ESCAPE '?';
- 在MySQL中，要查找课程表Courses中课程名cname以“数据”开头（如数据结构、数据库系统等）的所有课程记录，下列SQL语句表示正确的是( )。 A: select * from Courses where cname like “数据”; B: select * from Courses where cname like“%数据”; C: select * from Courses where cnamr like “数据%”; D: select * from Courses where cnamr like “%数据%”;
- Hive中的谓词like用于匹配特定的子串,能从courses表中查询书名包含,包含“大数据”的课程信息的是:( ) A: select * from courses where Cname like '%大数据%' B: select * from courses where Cname like '%大%数%据%' C: select * from courses where Cname like '_大_数_据_' D: select * from courses where Cname like '_大数据_'
- 查询选修了'数据库基础'课程的同学的学号,和这些同学选修的全部课程号和分数.select sno,cno,gradefrom ______________________ A: sc where sno in (select sno from sc join course on sc.cno=course.cno where cname='数据库基础') B: sc join course on sc.cno=course.cno where cname='数据库基础' C: sc where sno in (select sno from course where cname='数据库基础') D: sc where cno in (select cno from course where cname='数据库基础')
- 以下（ ）SQL语句可以查询出课程名中只包含“_design”字符串的课程信息。 A: select * from course where cname like '%_design%' B: select * from course where cname like '%\_design%' escape '\' C: select * from course where cname like '% D: _design%' escape ' E: ' F: select * from course where cname like '%*_design%' escape '*'