The term "sentence" in the context of programming

Question

I have come across statements such as the “default clause” in the context of a switch statement or the “JOIN clause” in the context of SQL, and I know what these expressions mean, but still I would like to see a clear definition of the term.

Answer 1

This is almost the same as in English (or in another language). A sentence is an incomplete fragment of a sentence, or in this case an expression that encapsulates an actor and an action. In your join clause example, the action is the join, and the actor is the join table.

Answer 2

, .

, .

,

• " 2:30" ()
• WHERE A.ID = B.ID( JOIN)

. .

• " 2:30".
• SELECT A.NAME, B.ADDRESS FROM A, B WHERE A.ID = B.ID

switch Java , , . "" , - (, " " ). " ".

"", .

Answer 3

, , .

COALESCE SQL, , : ", ?". , ? , :

, , .