How To Update Existing Rows in a Table

Q

How To Update Existing Rows in a Table? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts

✍: FYIcenter.com

A

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.

2007-05-11, 6176👍, 0💬

How To Insert Multiple Rows with a SELECT Statement
How To Insert Multiple Rows with a SELECT Statement? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts If want to insert rows into a table based on data rows from other tables, you can use a sub-query inside the INSERT statement as shown in the following script example: <?ph... 2007-05-10, 7327👍, 0💬

How To Break Output into Pages
How To Break Output into Pages? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts If you have a query that returns hundreds of rows, and you don't want to present all of them to your users on a single page. You can break output into multiple pages, and only present 10 rows per page... 2007-05-10, 6482👍, 0💬

How To Quote Date and Time Values in SQL Statements
How To Quote Date and Time Values in SQL Statements? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts If you want to provide date and time values in a SQL statement, you should write them in the format of "yyyy-mm-dd hh:mm:ss", and quoted with single quotes ('). The tutorial exerc... 2007-05-11, 6180👍, 0💬

How To Update Existing Rows in a Table
How To Update Existing Rows in a Table? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts 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 in... 2007-05-11, 6177👍, 0💬

How To Perform Key Word Search in Tables
How To Perform Key Word Search in Tables? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts The simplest way to perform key word search is to use the SELECT statement with a LIKE operator in the WHERE clause. The LIKE operator allows you to match a text field with a keyword pattern... 2007-05-11, 6117👍, 0💬

How To Query Tables and Loop through the Returning Rows
How To Query Tables and Loop through the Returning Rows? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts The best way to query tables and loop through the returning rows is to run the SELECT statement with the mysql_query() function, catch the returning object as a result set, an... 2007-05-11, 6116👍, 0💬

How To Quote Text Values in SQL Statements
How To Quote Text Values in SQL Statements? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts Text values in SQL statements should be quoted with single quotes ('). If the text value contains a single quote ('), it should be protected by replacing it with two single quotes (''). In... 2007-05-11, 5895👍, 0💬

How To Delete Existing Rows in a Table
How To Delete Existing Rows in a Table? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts If you want to remove a row from a table, you can use the DELETE statement with a WHERE clause to identify the row. The following sample script deletes one row: <?php include "mysql_con... 2007-05-11, 5861👍, 0💬

How To Fix the INSERT Command Denied Error
How To Fix the INSERT Command Denied Error? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts The reason for getting the "1142: INSERT command denied" error is that your user accound does not have the INSERT privilege on the table or database. To resolve this error, you need to ask... 2007-05-10, 5625👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.