Insert, Update and Delete Queries
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1 Insert, Update and Delete Queries
description
Insert, Update and Delete Queries. Return to you Address Book database. Insert a record. Recall that this action provides the SQL, better yet it will provided the PHP that writes the SQL. Copy the code and put it somewhere for safe keeping. Saved PHP-SQL code in Notepad. - PowerPoint PPT Presentation
Transcript of Insert, Update and Delete Queries
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Insert, Update and Delete Queries
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Return to you Address Book database. Insert a record.
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Recall that this action provides the SQL, better yet it will provided the PHP that writes the SQL.
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Copy the code and put it somewhere for safe keeping
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Saved PHP-SQL code in Notepad
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Mark a record and click the pencil icon to update that record.
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Change some fields and click Go.
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Rats. I didn’t see any SQL Update query to copy.
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Mark a record and click on the Delete button
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Copy the SQL for the DELETE, then decide whether you want to delete this record or not.
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Saved DELETE query
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Start two PHP files, place a form and a table with one row
and two columns on the first page.
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Add a list/menu and a submit button in column 1 and a radio group in column 2.
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Corresponding code.
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Add PHP code for putting names into list/menu.
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Result so far.
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Add a second form and second table with 1 row (to start) and 3 columns
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Corresponding code
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After the row (</tr>) but before end of table (</table>), start
PHP code block. Make array of database filed names.
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Write a foreach loop that iterates over the FieldArray making a table row corresponding to each
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Result so far.
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Add SQL query before foreach loop, edit middle column code.
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Result so far
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Add non-breaking space ( ) to middle
column
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After non-breaking space was added to middle column
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Add if so no Old data is showing for “Insert” choice
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Problem
• The radio buttons do not hold onto the information about what choice was clicked before.
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The top form’s action is the same page, so it can refer to its own $_POST array. I add some php script in the radio button tags to check the appropriate radio button.
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Add if structure that “remembers” which item from the list was selected
The extra word selected in the option tag will indicate which of the option should be showing.
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Added some code so that textboxes are read only and gray when Delete is the chosen action
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Remembers selected person, remembers selected action, grays out textboxes when delete is selected action.
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Add submit button to bottom form.
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Show old data in textbox (as starting point) when Update is selected action.
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Result showing old data in textbox (as starting point) when Update is selected.
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Insert Hidden Fields (to hold info from top form on bottom form so it can be passed to handler of bottom form)
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Result of hidden fields added
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PHP code to get values from top form onto bottom form
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Handler code to determine action requested on calling page
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