我想在某一天选择特定教师的时间表....声明应该假设教师可以在小学和高中教学
这是我的陈述
`select
class.name as subject_classmodel_name,
teachers.name as subject_teachers_name,
section.name as subject_section_name,
day.name as day_name,
time_format(time_range.time_start,'%H:%i') as time_time_start,
time_format(time_range.time_end,'%H:%i') as time_time_end,
sched.subject_ref, sched.time_ref, sched.day_ref
from schedule sched
join class_teachers_section
join time_range
join day
join class
join teachers
join section
where teachers.name = "ronald manlapao" and
section.level = "elementary" and
time_range.level = "elementary" and
class_teachers_section.id = sched.subject_ref and
class.id = class_teachers_section.class_ref and
teachers.id = class_teachers_section.teachers_ref and
section.id = class_teachers_section.section_ref and
day.id = sched.day_ref
order by time_range.time_start asc`
class_teachers_section(表)有表类,教师,部分 schedule(table)有table_teachers_section表,day,time_range
输出
预期结果
只有一行(最后一行),time_start(14:00)time_end(15:00)应该包含subject_classmodel_name,subject_teachers_name,subject_section_name,subject_ref,time_ref和day_ref列中的数据。其余的应该是空的
我正在使用MYSQL 5.6。
答案 0 :(得分:0)
我认为这是行不通的,因为你缺少“ON”声明
正确的语法是
SELECT field FROM tableA
JOIN tableB
ON tableA.id = tableB.id