在使用 PowerShell 运行 MySQL INSERT 语句后,我试图返回最后插入的 ID。我的 INSERT 工作正常,数据按预期插入到数据库中。我遇到的问题是获取刚刚插入的那一行的 ID。
我的代码如下:
./MySQL.ps1 -Query "insert into table (field1,field2,field3,field4) values ('$val1','$val2','$val3','$val4')"
$last_id = ./MySQL.ps1 -Query "SELECT LAST_INSERT_ID()"
Write-Host "Last ID: $last_id"
返回:
Last ID: System.Data.DataRow
MySQL.ps1
:
Param(
[Parameter(
Mandatory = $true,
ParameterSetName = '',
ValueFromPipeline = $true)]
[string]$Query
)
$MySQLAdminUserName = 'root'
$MySQLAdminPassword = 'password'
$MySQLDatabase = 'storage_manager'
$MySQLHost = 'localhost'
$ConnectionString = "server=" + $MySQLHost + ";port=3306;uid=" +
$MySQLAdminUserName + ";pwd=" + $MySQLAdminPassword +
";database=" + $MySQLDatabase
try {
[void][System.Reflection.Assembly]::LoadWithPartialName("MySql.Data")
$Connection = New-Object MySql.Data.MySqlClient.MySqlConnection
$Connection.ConnectionString = $ConnectionString
$Connection.Open()
$Command = New-Object MySql.Data.MySqlClient.MySqlCommand($Query, $Connection)
$DataAdapter = New-Object MySql.Data.MySqlClient.MySqlDataAdapter($Command)
$DataSet = New-Object System.Data.DataSet
$RecordCount = $dataAdapter.Fill($dataSet, "data")
$DataSet.Tables[0]
} catch {
Write-Host "ERROR : Unable to run query : $query `n$Error[0]"
} finally {
$Connection.Close()
}
我也尝试过以下方法并获得相同的信息。
SELECT max(id) FROM mytab WHERE category = 1