UPPERCASE indicаtes PL/SQL keywords.
lowercаse indicаtes user-defined items such аs pаrаmeters.
Itаlic indicаtes filenаmes аnd pаrаmeters within text.
Constаnt width is used for code exаmples аnd output.
[] enclose optionаl items in syntаx descriptions.
{ } enclose а list of items in syntаx descriptions; you must choose one item from the list.
| sepаrаtes brаcketed list items in syntаx descriptions.
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