Web Reference: This Oracle tutorial explains how to use comments within your SQL statements in Oracle / PLSQL with syntax and examples. Did you know that you can place comments within your SQL statements in Oracle? These comments can appear on a single line or span across multiple lines. Jul 23, 2025 · Unlike some programming languages, you cannot nest multi-line comments in Oracle PL/SQL. Multi-line comments can also be used to temporarily disable large blocks of code, which is helpful during debugging or testing. Jul 3, 2012 · If you're adding columns in your web application this is more indicative of a flaw in your data-model as you shouldn't need to be doing it. In response to your comment that a comment is a column attribute; it may seem so but behind the scenes Oracle stores this as an attribute of an object.
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