摘要:
www.java1234.comSQL语句1.DISTINCT 去除重复信息并进行升序排列select distinct colum from tablename2.ORDER BY 对查询结果进行排序(默认升序)select column1,column2 from tablename order by column1降序 selec column1 ,column2 form tablename order by column1 desc3.where 子句单条件查询 between 范围筛选 where between A1 and A2 查询结果包含A1,A2 NULL值参与... 阅读全文
posted @ 2013-06-04 20:54
┣█一生有你
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2013年6月4日