数据库学习之四--Join, Left Join, Right Join, Full Join对比
一、Join, Left Join, Right Join, Full Join区别： 二、查询对比 1. 创建表Persons和Orders,并插入数据: CREATE TABLE `persons` (
`ID_P` int(11) NOT NULL AUTO_INCREMENT,
`FistName` varchar(32) COLLATE utf8_bin DEFAUL
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