SELECT * FROM TAccident WHERE 'A'='B'是什么意思
/// <summary>
/// Get DataSet with empty TAccident table (used for adding new records).
/// </summary>
public DataSet GetEmpty()
{
return SqlHelper.ExecuteDataset(cn, CommandType.Text, "SELECT * FROM TAccident WHERE 'A'='B'", "TAccident");
}
请问这个WHERE'A'='B'是表示什么意思啊