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SQL Server
從數(shù)據(jù)庫(kù)表中的第M條記錄開(kāi)始取N條記錄,利用Top關(guān)鍵字:注意如果Select語(yǔ)句中既有top,又有order by,則是從排序好的結(jié)果集中選擇:
SELECT *
FROM ( SELECT Top N *
FROM (SELECT Top (M + N - 1) * FROM 表名稱 Order by 主鍵 desc) t1 ) t2
Order by 主鍵 asc
實(shí)例:
select * from ( select TOP pagesize * FROM ( SELECT TOP pagesize*cureentpage * from user_table ORDER BY id ASC ) as aSysTable ORDER BY id DESC ) as bSysTable ORDER BY id ASC
例如從表Sys_option(主鍵為sys_id)中從10條記錄還是檢索20條記錄,語(yǔ)句如下:
SELECT *
FROM ( SELECT TOP 20 *
FROM (SELECT TOP 29 * FROM Sys_option order by sys_id desc) t1) t2
Order by sys_id asc
Oralce數(shù)據(jù)庫(kù)
從數(shù)據(jù)庫(kù)表中第M條記錄開(kāi)始檢索N條記錄
SELECT *
FROM (SELECT ROWNUM r,t1.* From 表名稱 t1 where rownum < M + N) t2
where t2.r >= M
例如從表Sys_option(主鍵為sys_id)中從10條記錄還是檢索20條記錄,語(yǔ)句如下:
SELECT *
FROM (SELECT ROWNUM R,t1.* From Sys_option where rownum < 30 ) t2
Where t2.R >= 10
MySQL數(shù)據(jù)庫(kù)
My sql數(shù)據(jù)庫(kù)最簡(jiǎn)單,是利用mysql的LIMIT函數(shù),LIMIT [offset,] rows從數(shù)據(jù)庫(kù)表中M條記錄開(kāi)始檢索N條記錄的語(yǔ)句為:
SELECT * FROM 表名稱 LIMIT M,N
例如從表Sys_option(主鍵為sys_id)中從10條記錄還是檢索20條記錄,語(yǔ)句如下:
select * from sys_option limit 10,20
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