Answer:
(a) Correlated.
Explanation:
Correlated subquery :These sub queries reference columns from outer table or uses values from outer query.These sub queries are processed atleast once for every row processed.So because of this reason correlated sub queries can be slow.Since the query in the question also uses value from the outer query so it is a correlated query.
Yes that is right a guiiconfatmenu is a list of commands that your computer will tell you to do
I guess the correct answer is concurrency control
Cοncurrеncy cοntrοl is a databasе managеmеnt systеms (DBMS) cοncеpt that is usеd tο addrеss cοnflicts with thе simultanеοus accеssing οr altеring οf data that can οccur with a multi-usеr systеm.
In database systems, the DBMS enforces rules about which user can perform which action when. The rules are known as concurrency control.
