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.
Both night terrors and nightmares are sleep disorders classified as parasomnias (abnormal episodes while asleep). The main difference between them is the stage of sleep during which they appear. Night terrors are Non-rapid eye movement parasomnias (NREM) and usually appear on N3 stage (deep sleep); they will specially appear early in the night.