CODEWITHSUNDEEP
notation
tryhuma
tryhuma

Reputation: 25

What's the name of notation?

Could anyone tell me what's the name of this notation? I mean all those () [] {} brackets? Where can I find theirs meaning?

CREATE TABLE Nazwa_relacji
({nazwa_atrybutu typ_atrybutu [{NOT NULL} | NULL]
[DEFAULT wartość_domyślna]
[{ograniczenie_atrybutu [ ...]}] [, ...]}
[,{ograniczenie_relacji [, ...]}]);

Upvotes: 0

Views: 79

Answers (1)

Christian Hayter
Christian Hayter

Reputation: 31071

It's a simplified use of Backus–Naur Form notation. BNF is very common in technical documentation, because it's an efficient way of describing most programming language syntax. The symbols in your example mean:

  • [] optional items
  • {} a group of items, normally used in conjunction with ...
  • ... marks where the preceding items in the group repeat
  • | either/or

Any symbols not defined in BNF are taken literally, e.g. ().

Upvotes: 1

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