How do I import a sql data file into SQL Server?
If you are talking about an actual database (an mdf file) you would Attach it
.sql files are typically run using SQL Server Management Studio. They are basically saved SQL statements, so could be anything. You don't "import" them. More precisely, you "execute" them. Even though the script may indeed insert data.
Also, to expand on Jamie F's answer, don't run a SQL file against your database unless you know what it is doing. SQL scripts can be as dangerous as unchecked exe's
If your file is a large file, 50MB+, then I recommend you use sqlcmd, the command line utility that comes bundled with SQL Server. It is easy to use and it handles large files well. I tried it yesterday with a 22GB file using the following command:
sqlcmd -S SERVERNAME\INSTANCE_NAME -i C:\path\mysqlfile.sql -o C:\path\output_file.txt
The command above assumes that your server name is SERVERNAME, that you SQL Server installation uses the instance name INSTANCE_NAME, and that windows auth is the default auth method. After execution output.txt will contain something like the following:
...
(1 rows affected)
Processed 100 total records
(1 rows affected)
Processed 200 total records
(1 rows affected)
Processed 300 total records
...
use readfileonline.com if you need to see the contents of huge files.
UPDATE
This link provides more command line options and details such as username and password:
https://dba.stackexchange.com/questions/44101/importing-sql-server-database-from-a-sql-file
- Start SQL Server Management Studio
- Connect to your database
- File > Open > File and pick your file
- Execute it