The MERGE Statement in SQL Server 2008. When the SQL MERGE statement was introduced in SQL Server 2008, it allowed database programmers to replace reams of messy code with something quick, simple and maintainable. The MERGE syntax just takes a bit of explaining, and Rob Sheldon is, as always, on hand to explain with plenty of examples. Starting with SQL Server 2008, you can use a MERGE statement to modify data in a target table based on data in a source table. The statement joins the target to the source by using a column common to both tables, such as a primary key.
Twilight sleep refers to feeling a little awake and a little asleep- sort of in the middle. Thatâs a pretty good analogy for conscious sedation- since some people may fall asleep, due to their relaxed state, and some may have no memory of the dental procedure, and arenât bothered at all, by whatâs going on.
Twilight is produced by sunlight scattering in the upper atmosphere, illuminating the lower atmosphere so that the surface of the Earth is neither completely lit nor completely dark. The word twilight is also used to denote the periods of time when this illumination occurs. The further the Sun is below the horizon, the dimmer the twilight (other things such as atmospheric conditions being equal).