摘要: 查某一表的行数select max(rownum) from tablename 插入数据之前判断是否重复insert into tablename (coloum1,coloum2) select coloum1,coloum2 from dual where not exists( se... 阅读全文
posted @ 2016-01-06 17:23 q1665656796 阅读(158) 评论(0) 推荐(0) 编辑