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RENAME TABLE customers_fact_log_20071016 TO customers_fact_log_1;RENAME TABLE customers_fact_log TO customers_fact_log_2;CREATE TABLE customers_fact_log (    `customers_fact_log_id` int(11) NOT NULL auto_increment,    `customers_id` int(11) NOT NULL default '0',    `fact_type_id` int(11) NOT NULL default '0',    `date` datetime NOT NULL default '0000-00-00 00:00:00',    `attr1` varchar(255) default NULL,    `attr2` varchar(255) default NULL,    `attr3` varchar(255) default NULL,    `attr4` varchar(255) default NULL,    `attr5` varchar(255) default NULL,    `attr6` varchar(255) default NULL,    `attr7` varchar(255) default NULL,    `attr8` varchar(255) default NULL,    `attr9` varchar(255) default NULL,    `attr10` varchar(255) default NULL,    `attr11` varchar(255) default NULL,    `attr12` varchar(255) default NULL,    `attr13` varchar(255) default NULL,    `attr14` varchar(255) default NULL,    `attr15` varchar(255) default NULL,    `attr16` varchar(255) default NULL,    `attr17` varchar(255) default NULL,    `attr18` varchar(255) default NULL,    `attr19` varchar(255) default NULL,    `attr20` varchar(255) default NULL,    PRIMARY KEY  (`customers_fact_log_id`))ENGINE=MERGE UNION=(customers_fact_log_1, customers_fact_log_2) INSERT_METHOD=LAST;