Mybatis动态sql标签

if标签

	
		select * from t_student 
		 where gradeId=#{gradeId}
		 
		 	and name like #{name}
		 
		 
		 	and age=#{age}
		 
	

choose when 和otherwise标签

	
	
		select * from t_student 
		 
		 	
		 		where gradeId=#{gradeId}
		 	
		 	
		 		where name like #{name}
		 	
		 	
		 		where age=#{age}