Scripting 将操作结果保存到.BAT文件中的变量中

我有以下BAT文件工作正常： 它连接到特定的sql server并选择getdate（）

我真正想要的是测试服务器是否可连接

我想要一些像：

set is_connectable  = call sqlcmd.exe %%SERVITORE%%

我有没有办法做到这一点

谢谢和问候 马塞洛

---

运行查询并将结果设置为DOS环境变量很容易。例如，您可以执行以下操作从SQL Server实例获取日期/时间（SQL Server正在我的实例中本地运行）：

但是，本例中设置的

是可连接的

环境变量将具有任意值，这将使其难以计算。由于您只是尝试验证SQL Server是否存在、是否处于活动状态以及是否响应，因此应运行一个查询，以创建更可预测的输出，如下所示：

@echo off

:: Make sure the variable is undefined to start with
set is_connectable=

:: Make the connection and run a query that should always return '1'
for /f "skip=2 delims= " %%i in ('sqlcmd -S localhost -E -Q "set nocount on; select 1 as [Rows] into #temp; select @@rowcount as [Rows]; drop table #temp"') do set is_connectable=%%i

:: Verify if SQL Server is avaialble
if not defined is_connectable goto NotFound
if "%is_connectable%"=="1" goto Found
goto UnknownError

:Found
echo SQL Server was found and returned '1' as expected...
goto TheEnd

:NotFound
echo SQL Server was not found...
goto TheEnd

:UnknownError
echo SQLServer was found, but the return value was '%is_connectable%' instead of '1'...
goto TheEnd

:TheEnd

---

如果您只想测试可达性，那么如果实用程序失败，您可能（我已经测试过）可以使用-b选项返回errorlevel=1。来源：-错误报告选项。（这不回答您的原始问题，因此仅作评论）

for /f "skip=2 delims=" %%i in ('sqlcmd -S localhost -E -Q "set nocount on; select getdate() as [Now]"') do set is_connectable=%%i

@echo off

:: Make sure the variable is undefined to start with
set is_connectable=

:: Make the connection and run a query that should always return '1'
for /f "skip=2 delims= " %%i in ('sqlcmd -S localhost -E -Q "set nocount on; select 1 as [Rows] into #temp; select @@rowcount as [Rows]; drop table #temp"') do set is_connectable=%%i

:: Verify if SQL Server is avaialble
if not defined is_connectable goto NotFound
if "%is_connectable%"=="1" goto Found
goto UnknownError

:Found
echo SQL Server was found and returned '1' as expected...
goto TheEnd

:NotFound
echo SQL Server was not found...
goto TheEnd

:UnknownError
echo SQLServer was found, but the return value was '%is_connectable%' instead of '1'...
goto TheEnd

:TheEnd