PHP MSSQL - Inserting Data with NULL Values

Q

PHP MSSQL - How To Insert Data with NULL Values?

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A

There are two ways to provide NULL value to a column in an INSERT statement:

  • Include the column in the statement, but specify keyword NULL as the value.
  • Exclude the column from the statement.

The following tutorial exercise inserts two rows. Both of them have NULL values. But they were inserted differently:

<?php
  $con = mssql_connect('LOCALHOST','sa','FYIcenter');
  mssql_select_db('FyiCenterData', $con);

  $sql = "INSERT INTO fyi_links" 
      . " (id, url, notes, counts, time)"
      . " VALUES (101, 'dev.fyicenter.com',"
      . " NULL, NULL, NULL)";
  $res = mssql_query($sql,$con);
  if (!$res) {
    print("SQL statement failed with error:\n");
    print("   ".mssql_get_last_message()."\n");
  } else {
    print("One data row inserted.\n");
  }

  $sql = "INSERT INTO fyi_links (id, url) VALUES ("
      . " 102, 'dba.fyicenter.com')";
  $res = mssql_query($sql,$con);
  print("Another data row inserted.\n");

  mssql_close($con); 
?>

If you run this script, you will get:

One data row inserted.
Another data row inserted.

 

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2024-02-28, 1264🔥, 0💬