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cavac
<p>I find it odd that SQL is hardly ever mentioned in this type of lists. Sooner or later you will have to deal with databases. And yes, i consider SQL a full programming language. Many modern databases have (turing complete) server side processing with at least one mode using the SQL language as a basis.</p>
<p>Of course, PostgreSQL takes the cake, again, because it also supports Perl, Python, TCL and whatever you like. Which allows you to support weird stuff like <br/><code>SELECT title, url FROM perlmonks WHERE supersearch like '%learning%perl%';</code><br/> But you'd still need to know SQL to get going.</p>
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<code>perl -e 'use Crypt::Digest::SHA256 qw[sha256_hex]; print substr(sha256_hex("the Answer To Life, The Universe And Everything"), 6, 2), "\n";'</code>
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