title: MySQL query to do nothing (like pass)
body: <p>Many languages have a construction that fills a syntactic position of a statement but has no effect: <code>pass</code> in Python, <code>\relax</code> in TeX, <code>CONTINUE</code> in Fortran, <code>;</code> in C and Perl. </p>
  
  <p>What is its equivalent in MySQL? That is, a query that would be syntactically correct but have no effect -- apart from confusing expressions like <code>SELECT * FROM table LIMIT 0</code>.</p>
  
  <p>This is useful when the queries are generated automatically and at some point the generation procedure is expected to generate a query but there is no action to do.</p>