比較結果從2個數據庫服務器下面

Question

我的PowerShell腳本的偉大工程，返回1 DataTable來自不同數據庫的兩行，但我不能工作了如何將這些2行進行比較。

的情況是我有2臺數據庫服務器，並希望從同一個表上都比較max(id)，比較，然後如果他們是不同的可能警報。

警報位，我可以做，但我以前沒有使用過DataTable秒。

function readServer1 { 
    # Connection variables 
    $server = "db1" 
    $port = 1234 
    $driver = "Adaptive Server Enterprise" 
    $query = "select max(id) as 'id' from table" 
    $db = "db" 
    $uid = "uid" 
    $pwd = "pwd" 
    # Create Object and Connection 
    $conn = New-Object System.Data.Odbc.OdbcConnection 
    $conn.ConnectionString = "driver={$driver};db=$db;na=$server,$port;uid=$uid;pwd=$pwd;" 
    $conn.Open() 
    $cmd = New-Object System.Data.Odbc.OdbcCommand($query, $conn) 
    $cmd.CommandTimeout = 30 
    # Create a Data Table 
    $dt = New-Object System.Data.DataTable 
    $dt.Load($cmd.ExecuteReader()) 
    $dt.Rows 
    # Close Connection 
    $conn.Close() 
} 

function readServer2 { 
    # Connection variables 
    $server = "db2" 
    $port = 1234 
    $driver = "Adaptive Server Enterprise" 
    $query = "select max(id) as 'id' from table" 
    $db = "db" 
    $uid = "uid" 
    $pwd = "pwd" 
    # Create Object and Connection 
    $conn = New-Object System.Data.Odbc.OdbcConnection 
    $conn.ConnectionString = "driver={$driver};db=$db;na=$server,$port;uid=$uid;pwd=$pwd;" 
    $conn.Open() 
    $cmd = New-Object System.Data.Odbc.OdbcCommand($query, $conn) 
    $cmd.CommandTimeout = 30 
    # Create a Data Table 
    $dt = New-Object System.Data.DataTable 
    $dt.Load($cmd.ExecuteReader()) 
    $dt.Rows 
    # Close Connection 
    $conn.Close() 
} 

readServer1 
readServer2 

它返回的結果是這樣的：

id 
-- 
12345 
12346 

Answer 1

只需將功能執行結果變量並加以比較。像這樣：

$var1 = readServer1 | Select -Expand id 
$var2 = readServer2 | Select -Expand id 
if ($var1 -ne $var2) { Do-That }