Microsoft ODBC Driver 17 for SQL Server connection strings

Using SQL Server Express? The server name syntax is ServerName\SQLEXPRESS where you substitute ServerName with the name of the server where SQL Server Express is running.

Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"

The default SQL Server port is 1433 and there is no need to specify that in the connection string.

Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.

This one is working only on Windows, not on macOS or Linux. There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.

Please note if you are using TCP/IP (using the network library parameter) and database mirroring, including port number in the address (formed as servername,portnumber) for both the main server and the failover partner can solve some reported issues.

Using SQL Server Express? The server name syntax is ServerName\SQLEXPRESS where you substitute ServerName with the name of the server where SQL Server Express is running.

Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"

The default SQL Server port is 1433 and there is no need to specify that in the connection string.

Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.

This one is working only on Windows, not on macOS or Linux. There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.

Please note if you are using TCP/IP (using the network library parameter) and database mirroring, including port number in the address (formed as servername,portnumber) for both the main server and the failover partner can solve some reported issues.

Using SQL Server Express? The server name syntax is ServerName\SQLEXPRESS where you substitute ServerName with the name of the server where SQL Server Express is running.

Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"

The default SQL Server port is 1433 and there is no need to specify that in the connection string.

Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.

This one is working only on Windows, not on macOS or Linux. There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.

Please note if you are using TCP/IP (using the network library parameter) and database mirroring, including port number in the address (formed as servername,portnumber) for both the main server and the failover partner can solve some reported issues.

Using SQL Server Express? The server name syntax is ServerName\SQLEXPRESS where you substitute ServerName with the name of the server where SQL Server Express is running.

Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"

The default SQL Server port is 1433 and there is no need to specify that in the connection string.

Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.

This one is working only on Windows, not on macOS or Linux. There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.

Please note if you are using TCP/IP (using the network library parameter) and database mirroring, including port number in the address (formed as servername,portnumber) for both the main server and the failover partner can solve some reported issues.

Using SQL Server Express? The server name syntax is ServerName\SQLEXPRESS where you substitute ServerName with the name of the server where SQL Server Express is running.

Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"

The default SQL Server port is 1433 and there is no need to specify that in the connection string.

Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.

This one is working only on Windows, not on macOS or Linux. There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.

Please note if you are using TCP/IP (using the network library parameter) and database mirroring, including port number in the address (formed as servername,portnumber) for both the main server and the failover partner can solve some reported issues.

Using SQL Server Express? The server name syntax is ServerName\SQLEXPRESS where you substitute ServerName with the name of the server where SQL Server Express is running.

Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"

The default SQL Server port is 1433 and there is no need to specify that in the connection string.

Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.

This one is working only on Windows, not on macOS or Linux. There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.

Please note if you are using TCP/IP (using the network library parameter) and database mirroring, including port number in the address (formed as servername,portnumber) for both the main server and the failover partner can solve some reported issues.