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Examples of syntax diagrams (SQL)
This icon (three arrows) introduces a multi-step procedure.
This icon (one arrow) introduces a single-step procedure.
Preface
lowercase Lowercase words are source language elements that are not SQL
keywords.
[ ]
{ }
|
...
Large brackets indicate the items within them are optional.
In this example, GRANT, RESOURCE, DBA, and TO are keywords. You must specify RESOURCE, DBA,
or both, and at least one user_name. Optionally you can specify additional user_name items;
each subsequent user_name must be preceded by a comma:
Syntax
Convention Description
Large braces indicate the items within them are required. They are
used to simplify complex syntax diagrams.
A vertical bar indicates a choice.
Ellipses indicate repetition: you can choose one or more of the
preceding items.
GRANT { RESOURCE, DBA } TO user_name [, user_name ] ... ;
This excerpt from an ODBC application invokes a stored procedure using the ODBC syntax
{ call procedure_name ( param ) }, where braces and parentheses are part of the language:
Syntax
proc1( param, "{ call proc2 (param) }", param);
In this example, you must specify a table_name, view_name, or synonym, but you can choose
only one. In all SQL syntax, if you specify the optional owner_name qualifier, there must not be
a space between the period separator and table_name, view_name, or synonym:
Syntax
CREATE [ PUBLIC ] SYNONYM synonym
FOR [ owner_name.]{table_name |view_name |synonym } ;
Preface–5