FIELD(str,str1,str2,str3,...) Returns the index (position) of str in the str1, str2, str3, ... list. Returns 0 if str is not found.If all arguments to FIELD() are strings, all arguments are compared a
FIND_IN_SET(str,strlist) Returns a value in the range of 1 to N if the string str is in the string list strlist consisting of N substrings. A string list is a string composed of substrings separ
http://dev.mysql.com/doc/refman/5.6/en/partitioning.html查看数据库是否支持partiiton：mysql> show plugins; +----------------------------+----------+--------------------+---------+---------+ | N
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