How to add data from SQL server to hashtable using PowerShell? - sql

Question

Basically, I want the data to show up in an excel file like it shows in the SQL database.
This is much more simplified version of the work that I need to do but in essence this what it is.
I retrieve the data from SQL and for each item retrieved(which is the primary key) I want the data corresponding to it to be added in the hashtable. I then export this hashtable as a CSV
The CSV file is generated but with some weird data
I am not sure what exactly is wrong because when I Write-host $hashObject I can see the data is in there.
Code
$server = "DESKTOP\SQLEXPRESS"
$database = "AdventureWorks2019"
$hashTable = #{}
$hashObject = #([PSCustomObject]$hashTable)
$query = "SELECT[DepartmentID] FROM [AdventureWorks2019].[HumanResources].[Department]"
$invokeSql = Invoke-Sqlcmd -ServerInstance $server -Database $database -Query $query
$departmentResult = $invokeSql.DepartmentID
ForEach($department in $departmentResult){
$queryAll = "SELECT [Name],[GroupName],[ModifiedDate]FROM [AdventureWorks2019].[HumanResources].[Department] Where DepartmentID=$department"
$invokeSql = Invoke-Sqlcmd -ServerInstance $server -Database $database -Query $queryAll
$name = $invokeSql.Name
$groupName = $invokeSql.GroupName
$modifiedDate = $invokeSql.ModifiedDate
$hashObject+=("Department",$department, "Name",$name,"GroupName",$groupName,"ModifiedDate",$modifiedDate)
}
ConvertTo-Csv $hashObject| Export-Csv -Path "C:\Users\Desktop\PowerShell\HashTable_OutputFiles\HashOutput.csv"

Answer 1

This is a simplified version of what you're attempting to do, in this case you should be able to use the SQL IN Operator in your second query instead of querying your Database on each loop iteration.
As aside, is unclear what you wanted to do when declaring a hash table to then convert it to a PSCustomObject instance and then wrap it in an array:
$hashTable = #{}
$hashObject = #([PSCustomObject] $hashTable)
It's also worth noting that ConvertTo-Csv and Import-Csv are coded in such a way that they are intended to receive objects from the pipeline. This answer might help clarifying the Why. It's also unclear why are you attempting to first convert the objects to Csv and then exporting them when Import-Csv can (and in this case, must) receive the objects, convert them to a Csv string and then export them to a file.
$server = "DESKTOP\SQLEXPRESS"
$database = "AdventureWorks2019"
$query = "SELECT [DepartmentID] FROM [AdventureWorks2019].[HumanResources].[Department]"
$invokeSql = Invoke-Sqlcmd -ServerInstance $server -Database $database -Query $query
$department = "'{0}'" -f ($invokeSql.DepartmentID -join "','")
$query = #"
SELECT [Name],
[GroupName],
[ModifiedDate]
FROM [AdventureWorks2019].[HumanResources].[Department]
WHERE DepartmentID IN ($department);
"#
Invoke-Sqlcmd -ServerInstance $server -Database $database -Query $query |
Export-Csv -Path "C:\Users\Desktop\PowerShell\HashTable_OutputFiles\HashOutput.csv"
If you want to query the database per ID from the first query, you could do it this way (note this is similar to what you where looking to accomplish, merge the ID with the second results from the second query):
$invokeSql = Invoke-Sqlcmd -ServerInstance $server -Database $database -Query $query
$query = #"
SELECT [Name],
[GroupName],
[ModifiedDate]
FROM [AdventureWorks2019].[HumanResources].[Department]
WHERE DepartmentID = '{0}';
"#
& {
foreach($id in $invokeSql.DepartmentID) {
$queryID = $query -f $id
Invoke-Sqlcmd -ServerInstance $server -Database $database -Query $queryID |
Select-Object #{ N='DepartmentID'; E={ $id }}, *
}
} | Export-Csv -Path "C:\Users\Desktop\PowerShell\HashTable_OutputFiles\HashOutput.csv"