oracle:
1、查詢前10行:select * from sc_objects where rownum <=10
2、利用minus
查詢10到20行:select * from sc_objects where rownum <=20 minus select * from sc_objects where rownum <=10;
查詢20行之後:select * from sc_objects minus select * from sc_objects where rownum <=20;
3、常用於
分頁查詢:
pagesize:每頁顯示的記錄數
currentpage:當前頁號
資料表的名字是:components
索引主鍵字是:id
select * from components where id not in(select id from components where rownum<=(pagesize*(currentpage-1))) and rownum<=pagesize order by id;
如下例:
select * from sc_objects where id not in(select id from sc_objects where rownum<=100) and rownum<=10 order by id;
4、一種是利用oracle的rownum,這個是oracle查詢自動返回的序號,一般不顯示,但是可以通過select rownum from [表名],可以看到,是從1到當前的記錄總數。
select * from (select rownum tid,components.* from components where rownum<=100) where tid<=10;
mysql和sqlite:
查詢n+1到m行: select * from tadd order by id limit n,m;
示例:select * from tadd order by id limit 4 offset 2;
select * from tadd order by id limit 2,4;
sqlserver:
select top 5 * from sc_objects where id not in(select top(當前頁-1)*5) id from sc_objects;
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