SQL Comments

SQL statements support two types of comments:

Single-line Comments

Starting with --, everything until the end of the line is ignored.

-- This is a single-line comment SELECT 1; -- Inline comment

Starting with /* and ending with */, everything in between is ignored. Multi-line comments support nesting.

/* This is a multi-line comment */ SELECT /* Inline comment */ 1 + 2; /* Nested comment /* inner */ outer */ SELECT 1;

Comments can appear anywhere in a SQL statement.
Single-line comments start with -- and end at the line break; no closing marker is needed.
Multi-line comments must have matching /* and */.