title: For using SQL in C which header files we need to include in the program?
body: <p>In my C program I have to make a connection to a database where I am using these statements:</p>
  
  <pre><code>EXEC SQL INCLUDE sqlca;
  EXEC SQL begin declare section;
  EXEC SQL end declare section;
  </code></pre>
  
  <p>But I am getting error for <code>EXEC</code>. It says </p>
  
  <pre><code>`EXEC' undeclared (first use in this function)
  </code></pre>
  
  <p>Am I missing any header file or something else which enables to use these commands?</p>