Forget serializable, PostgreSQL 7.0 included functional ACID-safe transactions 5 years before MySQL but didn&#x27;t include LEFT OUTER JOIN (<a href="http:&#x2F;&#x2F;www.postgresql.org&#x2F;docs&#x2F;7.1&#x2F;static&#x2F;release-7-1.html" rel="nofollow">http:&#x2F;&#x2F;www.postgresql.org&#x2F;docs&#x2F;7.1&#x2F;static&#x2F;release-7-1.html</a>) . That was my first taste of &quot;if you can&#x27;t do it right, don&#x27;t ship it.&quot;