如何使用 PowerShell 在 SQL 服务器中仅插入唯一记录

Question

我正在使用 PowerShell 将我的 CSV 数据插入我的 sql 服务器数据库，但我只是想知道如何修改我的 sql 查询，以便它检查 GID 和源值已在 Daily_Proc table 中匹配，如果不存在则仅插入。

基本上我不想每次运行脚本时都在我的数据库中一次又一次地插入相同的记录。

Function InsertError {
    $ErrorActionPreference = 'Stop'

    # check for file explicitly (in case a directory with that name exists)
    if (![System.IO.File]::Exists($Global:ErrorReport)) {
        # throwing an exception will abort the job
        write-log "Exiting script, no file found"
        throw (New-Object System.IO.FileNotFoundException("File not found: $Global:ErrorReport", $Global:ErrorReport))
    }
    else {
        $CSVImport = Import-CSV $Global:ErrorReport
        ForEach ($CSVLine1 in $CSVImport) {
            $CSVHold1 = $CSVLine1.Hold
            $CSVGID1 = $CSVLine1.GID
            $CSVSource1 = $CSVLine1.Source
            $CSVTYPE1 = $CSVLine1.TYPE
            $CSVMessage1 = $CSVLine1.Message
            $CSVCreatedDate1 = $CSVLine1.Time

            If ($CSVMessage1 -ne "The mailbox or SharePoint site may not exist.  If this is incorrect, please contact Microsoft support.  Otherwise, please remove it from this policy.") {
                $query = "USE $Global:Database
            INSERT INTO Daily_Proc (Hold, GID, Source, Type, CreatedDate, Status)
            VALUES('$CSVHold1', '$CSVGID1', '$($CSVSource1 -replace "'","''")','$CSVTYPE1', '$CSVCreatedDate1','Error-Retry');"

                Invoke-Sqlcmd -Query $query -ServerInstance $Global:Server -Database $Global:Database
            }
        }
    }
}

Answer 1

所以我相信你应该能够像下面那样做：

INSERT INTO Daily_Proc (Hold, GMID, Source, Type, CreatedDate, Status)
SELECT '$CSVHold1', '$CSVGMID1', '$($CSVSource1 -replace "'","''")','$CSVTYPE1', '$CSVCreatedDate1','Error-Retry'
WHERE NOT EXISTS (SELECT 1
                  FROM Daily_Proc
                  WHERE Hold = '$CSVHold1'
                  AND GMID = '$CSVGMID1'
                  AND Source = '$($CSVSource1 -replace "'","''")'
                  AND Type = '$CSVTYPE1'
                  AND CreatedDate = '$CSVCreatedDate1'
                  AND Status = 'Error-Retry')

插入....select 不存在的技术总是能很好地防止欺骗和 pk 违规。

如何使用 PowerShell 在 SQL 服务器中仅插入唯一记录

How to insert only unique record in SQL Server using PowerShell

sql

sql-server

powershell

powershell-4.0