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MySQL Tutorial - 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 Create a New Table?
2. How To Get the Number of Rows Selected or Affected by a SQL Statement?
3. How To Insert Data into an Existing Table?
4. How To Fix the INSERT Command Denied Error?
5. How To Insert Multiple Rows with a SELECT Statement?
6. What Is a Result Set Object?
7. How To Query Tables and Loop through the Returning Rows?
8. How To Break Query Output into Pages?
9. How To Update Existing Rows in a Table?
10. How To Delete Existing Rows in a Table?
11. How To Quote Text Values in SQL Statements?
12. How To Quote Date and Time Values in SQL Statements?
13. How To Display a Past Time in Days, Hours and Minutes?
14. How To Perform Key Word Search in Tables?
15. How To Build WHERE Criteria with Web Form Search Fields?
16. How To Query Multiple Tables Jointly?
17. How To Define the ID Column as Auto-Incremented?
18. How To Get the Last ID Assigned by MySQL?