-- -- COMMENTS -- SELECT 'trailing' AS first; -- trailing single line SELECT /* embedded single line */ 'embedded' AS second; SELECT /* both embedded and trailing single line */ 'both' AS third; -- trailing single line SELECT 'before multi-line' AS fourth; /* This is an example of SQL which should not execute: * select 'multi-line'; */ SELECT 'after multi-line' AS fifth; -- -- Nested comments -- /* SELECT 'trailing' as x1; -- inside block comment */ /* This block comment surrounds a query which itself has a block comment... SELECT /* embedded single line */ 'embedded' AS x2; */ SELECT -- continued after the following block comments... /* Deeply nested comment. This includes a single apostrophe to make sure we aren't decoding this part as a string. SELECT 'deep nest' AS n1; /* Second level of nesting... SELECT 'deeper nest' as n2; /* Third level of nesting... SELECT 'deepest nest' as n3; */ Hoo boy. Still two deep... */ Now just one deep... */ 'deeply nested example' AS sixth; /* and this is the end of the file */