[SQL] - Attempted to read or write protected memory. This is often an indication that other memory is corrupt. 问题之解决

标签：hresult   别名   svi   语法   cat   res   images   数据   adapter   

场景：

使用 Oracle.DataAccess.dll 访问数据库时，OracleDataAdapter 执行失败。

异常：

System.AccessViolationException was unhandled
  HResult=-2147467261
  Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
  Source=Oracle.DataAccess

分析：

有问题的SQL
select distinct username from user u, role r where u.roleid = r.id and u.id = 1

正确的SQL
select distinct u.username from user u, role r where u.roleid = r.id and u.id = 1

总结：

规范使用 SQL 语法，指定表别名进行联合查询。

[SQL] - Attempted to read or write protected memory. This is often an indication that other memory is corrupt. 问题之解决

标签：hresult   别名   svi   语法   cat   res   images   数据   adapter   

原文地址：http://www.cnblogs.com/jinzesudawei/p/7087774.html