title: Exclamation mark in SQL (Oracle)
body: <p>Looking at V$SQL in my database, I have just found a strange query that looks like :</p>
  
  <pre><code>UPDATE "MYTABLE" "A1" SET "SOMECOLUMN" = (
      SELECT "A2"."ANOTHERCOLUMN" 
      FROM "ANOTHERTABLE"@! "A2" 
      WHERE "A2".ROWID=:B1
  )
  </code></pre>
  
  <p>Does anyone know the meaning of the syntax @!</p>
  
  <p>I have never seen something like it before in Oracle</p>
  
  <p>Thanks</p>