-- table中使用注释-- 一般方法comment on table comment_table is '注释表示例';comment on column comment_table.id is '主键ID';-- 使用动态sqlBEGINexecute immediate 'COMMENT ON column comment_table.id IS ''主键ID''';END;-- sql中使用注释-- 单行注释SELECT suppliers.supplier_id/* Author: TechOnTheNet.com */FROM suppliers;-- 多行注释SELECT suppliers.supplier_id/* * Author: TechOnTheNet.com * Purpose: To show a comment that spans multiple lines in your SQL statement. */FROM suppliers;