Working with Multiple Databases

Database - 1

$dbPath = "C:\temp\LiteDB\OS.db"
New-LiteDBDatabase -Path $dbPath -Verbose

#Connect Database
Open-LiteDBConnection -Database $dbPath

#Create a Collection.
New-LiteDBCollection -Collection OS_Col

Get-CimInstance -ClassName Win32_OperatingSystem | 
    Select CSName,Caption,TotalVisibleMemorySize,OSArchitecture,OSLanguage |
        ConvertTo-LiteDbBSON |
            Add-LiteDBDocument -Collection OS_Col

Database - 2

$dbPath = "C:\temp\LiteDB\CPU.db"
New-LiteDBDatabase -Path $dbPath -Verbose

#Connect Database and assign Connection to a variable that can be re-used
$CPU_DB_Conn = Open-LiteDBConnection -Database $dbPath

#Create a Collection.
New-LiteDBCollection -Collection CPU_Col -Connection $CPU_DB_Conn

Get-CimInstance -ClassName Win32_Processor |
    Select SystemName,DeviceID,Name,NumberOfCores,AddressWidth,Manufacturer |
        ConvertTo-LiteDbBSON |
            Add-LiteDBDocument -Collection CPU_Col -Connection $CPU_DB_Conn

Working on DB 1 & DB 2 simulatenously

# List collections in Database - 1
Get-LiteDBCollectionName

# List collections in Database - 2
Get-LiteDBCollectionName -Connection $CPU_DB_Conn

# List Records in OS_Col in Database - 1
Find-LiteDBDocument -Collection OS_Col

# List Records in CPU_Col in Database - 2
Find-LiteDBDocument -Collection CPU_Col -Connection $CPU_DB_Conn

# Create a 2nd collection in Database - 2
New-LiteDBCollection -Collection OS_DB1_Col -Connection $CPU_DB_Conn

#Insert records from a collection in Database - 1 into a collection in Database - 2
# Notice that we output the records as BSON so that we dont need to re-serilize the docs
Find-LiteDBDocument -Collection OS_Col -As BSON | 
    Add-LiteDBDocument -Collection OS_DB1_Col -Connection $CPU_DB_Conn

# List Records in OS_DB1_Col in Database - 2
Find-LiteDBDocument -Collection OS_DB1_Col -Connection $CPU_DB_Conn

# List all docs in all collections in Database - 2
Get-LiteDBCollectionName -Connection $CPU_DB_Conn | Find-LiteDBDocument 

# List all docs in all collections in Database - 1
Get-LiteDBCollectionName | Find-LiteDBDocument 

Close connections to DB 1 & DB 2

# close db1 connection
Close-LiteDBConnection

# close db2 connection
Close-LiteDBConnection -Connection $CPU_DB_Conn