Since SQL Server does not support arrays, when multiple values need to be sent to it, developers use a list of values (usually comma-separated ones).
SQL Server 2008 introduced an excellent feature called table-valued parameters (TVP), which allows you to pack values in a table and transfer them to SQL Server in table format. On the server, stored procedures or queries use this parameter as a table variable and can leverage set-based operations to improve performance, compared to separate executions per single parameter value. Thus, in all editions of SQL Server 2008 onwards it is strongly recommended to use TVP instead of a list of values in such cases.
However, lists of values as parameters for stored procedures are still ...
