(case when length(p.name)>25 then concat(substring(p.name,1,12),'...') else p.name end) as projectN

SELECT DISTINCT pw.project_id as projectId , (case when length(p.name)>25 then concat(substring(p.name,1,12),'...') else p.name end) as projectName FROM project_warning pw join warning_detail wd on pw.id = wd.warning_id join project p on p.id = pw.project_id join department d on d.dept_no = p.deparmtent_id where d.dept_name like concat('信息平台事业部-',ifnull( (select reverse(substring_index(reverse(substring_index((select dept_name from department where dept_no=:deptNo), '-', 2)), '-', 1))) ,''),'%') and date(pw.create_date) = date(now()) order by pw.id asc limit 5