利用top構造Sql Server分頁查詢
使用Sql Server分頁查詢是SQL數據庫最常見的操作之一,下面將為您介紹兩種利用top構造Sql Server分頁查詢的方法,供您參考。
Sql Server中,假設一個查詢sql為querySql,該sql為任意條件的組合,我們把它當作子查詢結果表,可利用Sql Server的top來構造通用Sql Server分頁查詢:
- if (pageInfo.getPageNum() == 1) {
- pagenatedSql = "select top " + pageInfo.pageSize + " * from (" + sql + ") as t1 " ;
- }
- else {
- pagenatedSql = "select top " + pageInfo.pageSize + " * from (" + sql + ") as t1 " +
- " where (t1." + indexKey + " > (select max(t3." + indexKey + ")" +
- " from (select top " + (pageInfo.pageNum - 1) * pageInfo.pageSize + " t2." + indexKey + " from (" + sql + ") as t2 order by t2." + indexKey + ") as t3" +
- " )) order by t1." + indexKey;
- }
其中pageInfo.getPageNum()為當前頁號(從1開始);pageInfo.getPageSize()為每頁行數;indexKey為表中索引列,通常為遞增的主鍵。
第二種方式:
pagesize: 每頁顯示記錄數
cureentpage:當前頁數
- 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
以上就是利用top構造Sql Server分頁查詢的方法。
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