title: Sql Statement(if (@companyCode is not null) set @companyCode = '%' + @companyCode + '%')?
body: <p>what is the meaning of below sql statement i mean what it saying?</p>
  
  <pre><code>if (@companyCode is not null) set @companyCode = '%' + @companyCode + '%'
  if (@companyName is not null) set @companyName = '%' + @companyName + '%'
  </code></pre>
  
  <p>thank you.</p>