运行多个查询并导出到不同的CSV文件

Question

我有一个将运行sql查询的脚本，如果结果返回，将这些结果导出到csv文件。我现在需要更进一步，并且有类似的东西： - 运行查询1，如果它返回结果保存。运行查询2，如果它返回结果保存，运行查询3，如果它返回结果保存。

$server = "Main" 
$database = "hellfire" 

$query1 = "Select * from mousetrap" 
$query2 = "Select * from mickey" 
$query3 = "Select * from brimstone" 

$templatefile = @"C:\book1.csv" 
$savedirectory = @"C:\ExportedFromSQL\Results\" 

#Actual Conenction To SQL Server Goes here 
#for brevity I am omitting 

#check if query returned results 
if ($SqlAdapter.Fill($DataSet) - ge 1) 
{ 
    #this is where my catch comes in 
    #if $query1 was executed I want to save the file as mouse 
    #if $query2 was executed I want to save the file as mi 
    #if $query3 was executed I want to save the file as stone 

    #$DataSet.Tables[0] | Export-Csv $templatefile -NoTypeInformation 
} 

Answer 1

使用函数来运行您的查询，保持它简单，并且您始终知道您正在执行哪个查询。

Function Execute-SQLquery { 
    param ($QueryName, $QueryString, $ResultDir) 

    #Actual Conenction To SQL Server Goes here 
    #for brevity I am omitting 

    if ($SqlAdapter.Fill($DataSet) -ge 1) 
    { 
     $DataSet.Tables[0] | Export-Csv (join-path $ResultDir ($QueryName + ".csv")) -NoTypeInformation 
     return $true 
    } else { 
     return $false 
    } 
} 

#Call your function 
    if (Execute-SQLquery "mousetrap" "Select * from mousetrap" $savedirectory) { 
     if (Execute-SQLquery "mickey" "Select * from mickey" $savedirectory) { 
      Execute-SQLquery "brimstone" "Select * from brimstone" $savedirectory 
     } 
    }