Mysql statistics retention rate

Mysql statistics retention rate SQL code begin declare I int; declare numareaId int (10); declare currentareaId int (10); SELECT COUNT (areaId), MIN (areaId) INTO @, @ B FROM option_area_info; SET numareaId = @ a; SET currentareaId = @ B; loop1: WHILE numareaId> 0 do set @ AID = currentareaId; SET I = 1; while I <8 do if exists (select * from statistics_player_l where createTime> = date_sub (curdate (), interval I day) and createTime <date_sub (curdate (), interval I-1 day) and areaId = @ AID) then update statistics_player_l set oneDayPlayer = (select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) and loginTime> = date_add (date_sub (curdate (), interval I day), interval 1 day) and loginTime <date_add (date_sub (curdate (), interval I day ), interval 2 day) and areaId = @ AID)/(select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) * 100) where createTime> = date_sub (curdate (), interval I day) and createTime <date_sub (curdate (), interval I-1 day ); update statistics_player_l set twoDayPlayer = (select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) and loginTime> = date_add (date_sub (curdate (), interval I day), interval 2 day) and loginTime <date_add (date_sub (curdate (), interval I day ), interval 3 day) and areaId = @ AID)/(select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) * 100) where createTime> = date_sub (curdate (), interval I day) and createTime <date_sub (curdate (), interval I-1 day ); update statistics_player_l set threeDayPlayer = (select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) and loginTime> = date_add (date_sub (curdate (), interval I day), interval 3 day) and loginTime <date_add (date_sub (curdate (), interval I day ), interval 4 day) and areaId = @ AID)/(select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) * 100) where createTime> = date_sub (curdate (), interval I day) and createTime <date_sub (curdate (), interval I-1 day ); update statistics_player_l set fourDayPlayer = (select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) and loginTime> = date_add (date_sub (curdate (), interval I day), interval 4 day) and loginTime <date_add (date_sub (curdate (), interval I day ), interval 5 day) and areaId = @ AID)/(select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) * 100) where createTime> = date_sub (curdate (), interval I day) and createTime <date_sub (curdate (), interval I-1 day ); update statistics_player_l set fiveDayPlayer = (select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) and loginTime> = date_add (date_sub (curdate (), interval I day), interval 5 day) and loginTime <date_add (date_sub (curdate (), interval I day ), interval 6 day) and areaId = @ AID)/(select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) * 100) where createTime> = date_sub (curdate (), interval I day) and createTime <date_sub (curdate (), interval I-1 day ); update statistics_player_l set sixDayPlayer = (select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) and loginTime> = date_add (date_sub (curdate (), interval I day), interval 6 day) and loginTime <date_add (date_sub (curdate (), interval I day ), interval 7 day) and areaId = @ AID)/(select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) * 100) where createTime> = date_sub (curdate (), interval I day) and createTime <date_sub (curdate (), interval I-1 day ); update statistics_player_l set sevenDayPlayer = (select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) and loginTime> = date_add (date_sub (curdate (), interval I day), interval 7 day) and loginTime <date_add (date_sub (curdate (), interval I day ), interval 8 day) and areaId = @ AID)/(select count (distinct playerId) from log_login where registerTime = date_sub (curdate (), interval I day) * 100) where createTime> = date_sub (curdate (), interval I day) and createTime <date_sub (curdate (), interval I-1 day); end if; SET I = I + 1; end while; SET numareaId = numareaId-1; SET currentareaId = currentareaId + 1; end while loop1; end