Invoke-Sqlcmd：SQL PowerShell 中不允许使用重复的列名称

Question

我已经在 14 个查询中吐出了Glenn Berry 的性能查询，但其中一个（第 9 个）不起作用。

这是我的 PowerShell 代码：

#Provide SQLServerName
$SQLServer ="localhost"
#Provide Database Name 
$DatabaseName ="master"
#Prompt for user credentials 
$credential = Get-Credential 

$Query1= "-- 09 Index Sizes
-- Note: THIS IS SLOW as it reads index blocks. SAMPLED is not that high, but watch for prod I/O impact if using 'DETAILED'
SELECT DB_NAME() AS DatabaseName,
 Object_name(i.object_id) AS TableName
   ,i.index_id, name AS IndexName
   ,i.type_desc
   ,ips.page_count, ips.compressed_page_count
   ,CAST(ips.avg_fragmentation_in_percent as DECIMAL(5,1)) [fragmentation_pct]
   ,CAST(ips.avg_page_space_used_in_percent as DECIMAL(5,1)) [page_space_used_pct]
   ,ips.index_depth, ips.page_count ,ips.forwarded_record_count, ips.record_count
  FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL, NULL, 'SAMPLED') AS ips -- or SAMPLED
    INNER JOIN sys.indexes AS i ON ips.object_id = i.object_id AND ips.index_id = i.index_id
where ips.page_count > 1
ORDER BY ips.record_count desc;"

Invoke-Sqlcmd  -Database $DatabaseName -ServerInstance $Server -Credential $credential -Query $Query1 | Format-Table 

返回的错误说：

Invoke-Sqlcmd : Duplicate column names are not permitted in SQL PowerShell. To repeat a column, use a column alias for the duplicate
column in the format Column_Name AS New_Name.
At C:\Users\FrancescoM\Desktop\CSV\Test.ps1:23 char:1
+ Invoke-Sqlcmd  -Database $DatabaseName -ServerInstance $Server -Crede ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : SyntaxError: (:) [Invoke-Sqlcmd], SqlPowerShellSqlExecutionException
    + FullyQualifiedErrorId : DuplicateColumnNameErrorMessage,Microsoft.SqlServer.Management.PowerShell.GetScriptCommand

不确定什么是重复列，因为如果我运行调用到 SSMS 上的 PowerShell 脚本的查询，我看不到任何重复列：

Answer 1

到家后，我以一种不错的方式格式化了查询，感谢 Notepad++，单击每一列后，我发现它ips.page_count被调用了两次。

所以确实有一个专栏叫做两次。