Updating database tables

The WHERE clause specifies which record(s) that should be updated.

One of the most common and challenging tasks for any application involves persisting and reading information to and from a database.

You will use the WHERE clause of the UPDATE statement to restrict the update to a single row. The basic syntax is: INSERT, table name, column list, VALUES, and then a list of the values to be inserted.

Query chaining refers to a method of connecting a number of methods, one after the other, with each method returning an object that can support the next method, improving readability and simplifying code.Large updates become much easier to perform when you understand some of the basic principles of database design.An Access database is not a file in the same sense as a Microsoft Office Word 2007 document or a Microsoft Office Power Point 2007 slide deck.Joomla can use different kinds of SQL database systems and run in a variety of environments with different table-prefixes.In addition to these functions, the class automatically creates the database connection.

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