General Query
save the below lines in notepad with name batch.bat and place inside the folder where all your script file are there
for %%G in (*.sql) do sqlcmd /S servername /d databasename -i"%%G"
pause
EXAMPLE
for %%G in (*.sql) do sqlcmd /S NFGDDD23432 /d EMPLYEEDB -i"%%G" pause
sometime if login failed for you please use the below code with username and password
for %%G in (*.sql) do sqlcmd /S SERVERNAME /d DBNAME -U USERNAME -P PASSWORD -i"%%G"
pause
for %%G in (*.sql) do sqlcmd /S NE8148server /d EMPLYEEDB -U Scott -P tiger -i"%%G" pause
After you create the bat file inside the folder in which your Script files are there just click on the bat file your scripts will get executed