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1、在oracle中 null 缺省会认为是最大值 ,因此 select id,description from security_application where mod(id,4)=0 order by description 执行结果: select id,description from security_application where mod(id,4)=0 order by description desc 执行结果: 2、使用nvl函数 nvl ...
SELECT * FROM( SELECT A.*,ROWNUM num FROM (SELECT * FROM product_user_comment order by user_id) A WHERE ROWNUM<=1550) WHERE num>=5 如果要排序功能要写三层 select * from(select rownum rn,empno,ename from emp where rownum<=10 order by empno) temp where temp.rn>5;
css: <style type="text/css"> <!-- input{ border-left:0px;border-top:0px;border-right:0px;border-bottom:1px solid #ff0000 } span{ vertical-align:top; } --> </style> div: <p> 姓名:<input type="text" name="T1" size="20" ...
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