Mysql分頁(yè)采用limt關(guān)鍵字
select * from t_order limit 5,10; #返回第6-15行數(shù)據(jù)
select * from t_order limit 5; #返回前5行
select * from t_order limit 0,5; #返回前5行
Mssql 2000分頁(yè)采用top關(guān)鍵字(20005以上版本也支持關(guān)鍵字rownum)
Select top 10 * from t_order where id not in (select id from t_order where id>5 ); //返回第6到15行數(shù)據(jù)
其中10表示取10記錄 5表示從第5條記錄開(kāi)始取
Oracle分頁(yè)
①采用rownum關(guān)鍵字(三層嵌套)
SELECT * FROM(
SELECT A.*,ROWNUM num FROM
(SELECT * FROM t_order)A
WHERE
ROWNUM<=15)
WHERE num>=5;--返回第5-15行數(shù)據(jù)
②采用row_number解析函數(shù)進(jìn)行分頁(yè)(效率更高)
SELECT xx.* FROM(
SELECT t.*,row_number() over(ORDER BY o_id)AS num
FROM t_order t
)xx
WHERE num BETWEEN 5 AND 15;
--返回第5-15行數(shù)據(jù)
解析函數(shù)能用格式
函數(shù)() over(pertion by 字段 order by 字段);
Pertion 按照某個(gè)字段分區(qū)
Order 按照勒個(gè)字段排序