1. Introducing the Embedded SQL Companion Guide : Conventions : Statements and Commands : Syntax
 
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Syntax
This manual uses the following conventions to describe statement and command syntax specifications:
Convention
Usage
Boldface
Indicates keywords, symbols or punctuation that you must type as shown
Italics
Represent a variable name for which you must supply an actual value
[ ] (brackets)
Indicate an optional item
{ } (braces)
Indicate an optional item that you can repeat as many times as appropriate
| (vertical bar)
Used between items in a list to indicate that you should choose one of the items
The following example illustrates the syntax conventions:
create table tablename (columnname  format
           {,columnname format}
)
           [with_clause]