Home >> FAQs/Tutorials >> PHP Script Tutorials and Tips >> Index

PHP Tutorials - Updating Existing Rows

By: FYICenter.com

(Continued from previous topic...)

How To Update Existing Rows in a Table?

Updating existing rows in a table requires to run the UPDATE statement with a WHERE clause to identify the row. The following sample script updates one row with two new values:

<?php
  include "mysql_connection.php";

  $sql = "UPDATE fyi_links SET notes='Nice site.', counts=8"
    . " WHERE id = 102";
  if (mysql_query($sql, $con)) {
    print(mysql_affected_rows() . " rows updated.\n");
  } else {
    print("SQL statement failed.\n");
  }

  mysql_close($con); 
?>

If you run this script, you will get something like this:

1 rows updated.

(Continued on next topic...)

1. How To Install MySQL Server?
2. How To Use MySQL Command Line Interface?
3. What Do You Need to Connect PHP to MySQL?
4. How To Connect to MySQL from a PHP Script?
5. How To Create a Database?
6. How To Select an Exiting Database?
7. How To Run a SQL Statement?
8. How To Create a Table?
9. How To Get the Number of Rows Selected or Affected by a SQL Statement?
10. How To Insert Data into a Table?
11. How To Insert Rows Based on SELECT Statements?
12. What Is a Result Set Object?
13. How To Query Tables and Loop through the Returning Rows?
14. How To Update Existing Rows in a Table?
15. How To Delete Existing Rows in a Table?
16. How To Quote Text Values in SQL Statements?
17. How To Quote Date and Time Values in SQL Statements?
18. How To Perform Key Word Search in Tables?
19. How To Query Multiple Tables Jointly?
20. How To Set the ID Column as Auto-Incremented?
21. How To Get the Last ID Assigned by MySQL?