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.
The time just after sunset, when the light is half-faded, but the world is not yet totally dark, is twilight. If you are between two states, like asleep and awake, that can also be called a twilight moment. Twilight comes just before the night falls. The early light, just before sunrise, is also technically called twilight but most people call it dawn.. The prefix twi- might be a clue that twilight happens twice a day, or it could mean half, as in the half-light of this time.