sql - Mysql: How to get a result for each day in between an start and an end date from a table that contains also a start and an end date? -

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i have start date , end date. each day between start , end date result, if there no results within stats table.

the best suggestion solve stored procedure creates temporary table each date (day) create join.

begin      declare d datetime;     create temporary table joindates (d date not null);      set d = fkstartdate;      while d <= fkenddate          insert joindates (d) values (d);         set d = date_add(d, interval 1 day);      end while;   select * `joindates` tempt left join `radacct` stats  on stats.acctstarttime <= tempt.d , (stats.acctstoptime >= tempt.d or stats.acctstoptime null) , calledstationid = calledstationid  order tempt.d asc;      drop temporary table joindates;  end

the join not finalized (just testing). see, join perfect if "radacct" table use 1 date col. create join using = operator on.

now "radacct" using acctstarttime , acctstoptime there entries (i can not modify table, given radius server) both datetime types.

so in query need entries between start , stop date acctstarttime has started in past or within time period. , acctstoptime within time period, after time period or null (active session).

the problem join solution: slow hell may have faster query ideas please?

thanks

appendix1: important result each entry on each day matches period of days, if acctstarttime acctstoptime goes on multiple days. users online.

appendix2: requested, full table structure of "radacct" – accounting table of freeradius mysql module …

create table `radacct` (  `radacctid` bigint(21) not null auto_increment,  `acctsessionid` varchar(64) not null default '',  `acctuniqueid` varchar(32) not null default '',  `username` varchar(64) not null default '',  `groupname` varchar(64) not null default '',  `realm` varchar(64) default '',  `nasipaddress` varchar(15) not null default '',  `nasportid` varchar(15) default null,  `nasporttype` varchar(32) default null,  `acctstarttime` datetime default null,  `acctstoptime` datetime default null,  `acctsessiontime` int(12) unsigned default null,  `acctauthentic` varchar(32) default null,  `connectinfo_start` varchar(50) default null,  `connectinfo_stop` varchar(50) default null,  `acctinputoctets` bigint(20) default null,  `acctoutputoctets` bigint(20) default null,  `calledstationid` varchar(50) not null default '',  `callingstationid` varchar(50) not null default '',  `acctterminatecause` varchar(32) not null default '',  `servicetype` varchar(32) default null,  `framedprotocol` varchar(32) default null,  `framedipaddress` varchar(15) not null default '',  `acctstartdelay` int(12) unsigned default null,  `acctstopdelay` int(12) unsigned default null,  `xascendsessionsvrkey` varchar(10) default null,  primary key (`radacctid`),  unique key `acctuniqueid` (`acctuniqueid`),  key `username` (`username`),  key `framedipaddress` (`framedipaddress`),  key `acctsessionid` (`acctsessionid`),  key `acctsessiontime` (`acctsessiontime`),  key `acctstarttime` (`acctstarttime`),  key `acctstoptime` (`acctstoptime`),  key `nasipaddress` (`nasipaddress`) ) engine=innodb auto_increment=2041894 default charset=latin1


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