select reverse(substring_index(reverse(substring_index((select dept_name from department where dept_no=20862),'-',2)),'-',1));select@a:=substring_index('信息平台事业部-企业运营平台部','-.
Given a string,find the length of the longest substring without repeating characters.Example 1:Input:"abcabcbb"Output:3 Explanation:The answer is"abc",with the length of 3.Example 2:Inpu.