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+<code sql>
+SELECT DISTINCT A.pid
+  FROM tags C, entries A LEFT JOIN comments B ON A.pid = B.pid
+ WHERE A.blog IN ('foo', 'bar')
+   AND A.pid = C.pid
+   AND (
+       C.tag = 'foo' OR
+       C.tag = 'bar' OR
+       A.title LIKE '%fffuuuu%' OR
+       B.teext LIKE '%fffuuuu%'
+   )
+</code>