摘要：
CREATE TABLE `test_int` ( `id` int(1) NOT NULL auto_increment, `b` int(11) default NULL, PRIMARY KEY (`a`) ) ENGINE=InnoDB insert into `test_int`(`id`,`b`) values (1,1),(2,0);-- 测试结果SELECT * FROM test_int WHERE b = '' ;-- 居然能把 id=2的查出来。-- 测试结果SELECT * FROM test_int WHERE b = '' AND b 阅读全文
