ct.course like "%course3%" 表示该字段包括course3
查询培训指定课程的员工信息
https://www.nowcoder.com/practice/a0ef4574056e4a219ee7d651ba82efef
select
st.staff_id,
st.staff_name
from
staff_tb st
left join cultivate_tb ct on st.staff_id = ct.staff_id
where
ct.course like "%course3%"
# ct.course like "%course3%" 表示该字段包括course3
