摘要: In this section we introduce the data types defined in the SQL standard.在这一节中,我们介绍数据类型(在ISO标准中定义的)。We start by defining what constitutes a vailed iden... 阅读全文
posted @ 2015-04-10 01:30 ZQXTXK 阅读(374) 评论(0) 推荐(0) 编辑