检查数据集在PowerShell中是否包含任何空值

Question

我遇到了一个问题，我将一些信息从SQL Server中提取到数据集中。

$adapter.Fill($AnalyticsData)
$AnalyticsData = $AnalyticsData.Tables[0] |
                 select * -ExcludeProperty RowError, RowState, HasErrors, Name,
                     Table, ItemArray

问题我得到的是$AnalyticsData数据集中的某些值为空。虽然，我确实指望数据集中的值似乎忽略了空值：

$EAICount = $AnalyticsData | Sort-Object -Property EtpAssetID -Unique
$SOACount = $AnalyticsData | Sort-Object -Property SharesOutstandingUnadjusted
$NUAWDIFCount = $AnalyticsData | Sort-Object -Property NavUnadjustedWithoutDivIncludeFee

Write-Host "EtpAssetID Unique Count: " .$EAICount.Count
Write-Host "SharesOutstandingUnadjusted Count: " .$SOACount.Count
Write-Host "NavUnadjustedWithoutDivIncludeFee Count: " .$NUAWDIFCount.Count

Write-Host "Non-Unique Count: " .$AnalyticsData.Count

if ($EAICount.Count -eq 12 -and $SOACount.Count -eq 12 -and $NUAWDIFCount.Count -eq 12) {
    Write-Host "DataSet is good"
} else {
    Write-Host "DataSet is containing one or more null values."
}

有人能指出我正确的方向，我在这里缺少检查数据集中的空值吗？或者我如何跟踪空值？

如果需要更多细节，请告诉我。