一、Oracle
1、SQL
-- order by
SELECT *
FROM (SELECT ORACLEPAGESQL1.*, ROWNUM RN
FROM (SELECT *
FROM (SELECT IDX, NAME, CH_NAME FROM TBL_USER) ORACLEPAGESQL
ORDER BY IDX ASC) ORACLEPAGESQL1
WHERE ROWNUM <= 20) ORACLEPAGESQL2
WHERE RN > 10;
-- no order by
SELECT *
FROM (SELECT ORACLEPAGESQL1.*, ROWNUM RN
FROM (SELECT IDX, NAME, CH_NAME FROM TBL_USER) ORACLEPAGESQL1
WHERE ROWNUM <= 20) ORACLEPAGESQL2
WHERE RN > 10;
2、CODE
/// <summary> /// 分页获取当前页记录 /// </summary> /// <param name="PageIndex">当前页面</param> /// <param name="PageSize">每页记录数</param> /// <param name="strSQL">查询SQL</param> /// <param name="strOrderBy">分组</param> /// <returns>分页SQL</returns> public string GetOraclePageSQL(int PageIndex, int PageSize, string strSQL, string strOrderBy) { string result = ""; int startIndex = (PageIndex - 1) * PageSize; int endIndex = startIndex + PageSize; if (!string.IsNullOrEmpty(strOrderBy)) { result = "SELECT * FROM (" + strSQL + ") oraclePageSQL ORDER BY " + strOrderBy; } else { result = strSQL; } result = "SELECT * FROM (SELECT oraclePageSQL1.*,rownum rn FROM (" + result + ") oraclePageSQL1 WHERE rownum<=" + endIndex + ") oraclePageSQL2 WHERE rn>" + startIndex; return result; } /// <summary> /// 分页获取总记录数 /// </summary> /// <param name="strSQL">查询SQL</param> /// <returns>总记录数SQL</returns> public string GetOraclePageCoutSQL(string strSQL) { string result = ""; result = "SELECT COUNT(*) totalNum FROM (" + strSQL + ") TOTALNUM "; return result; }
二、MySQL
1、SQL
SELECT * FROM zt_history limit 0,10
2、CODE
/// <summary> /// 获取数据集以及分页总记录数 /// </summary> /// <param name="PageIndex">当前页面</param> /// <param name="PageSize">每页记录数</param> /// <param name="strSQL">SQL</param> /// <param name="count">总记录数</param> /// <returns>数据集</returns> private DataTable GetMySQLDt(int PageIndex, int PageSize,string strSQL,out int count) { try { string strCon = "Data Source=localhost;Database=zentao;User Id=root;Password=;port=3309"; int intStart = (PageIndex -1) * PageSize; string strPageSQL = strSQL + " limit " + intStart + "," + PageSize; DataSet ds = MySqlHelper.ExecuteDataset(strCon, strPageSQL); string strCountSql = "SELECT COUNT(*) totalNum FROM (" + strSQL + ") TOTALNUM "; DataSet dsCount = MySqlHelper.ExecuteDataset(strCon, strCountSql); count = Convert.ToInt32(dsCount.Tables[0].Rows[0][0]); return ds.Tables[0]; } catch (Exception ex) { throw ex; } }
原文地址：http://www.cnblogs.com/illday/p/3797653.html
