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SQL Dynamic Select Statement Problem with possible Search and Replace solution

Posted on 2003-03-25
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Last Modified: 2010-03-05
I'm trying to build a dynamic piece of code that generates a HTML view like a year planner for all employees in the company all on one page. My appraoch is to use 2 Quesries, the first getting all the active employee names and the second then determines the dates of absence and plot that on a 365 dayscale to show the absence and type of absence on a simple sideways stacked barrgraph generated using shaded table fields. This works very well and my second query looks like this:

SELECT username, dayofyear(startdate), dayofyear(enddate),dayofyear(enddate) - dayofyear(startdate)+1 , absencetype
FROM `absence`
where username = '$Name $Surnames[$idx]'
order by absencetype

The problem that I encounter is with the Irish surnames like O'Kelly and O'Flynn. In the where clause the variables will translate to:

where username = 'Niall O'Kelly' and the Kelly part will cause an error message:

DBD::mysqlPP::st execute failed: You have an error in your SQL syntax near 'Kelly'
                                                                order by absencetype
                                                        ' at line 3 at D:\Data\script\emp_year.cgi line 29.

I was hoping to replace the ' with some escape code for ' using a search and replace feature but I am not that familiar with search and replace yet. Can anyone offer me some valuable assistance or pointers to my problem.
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Question by:Jattie
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Accepted Solution

by:
yokel earned 135 total points
ID: 8204156
Try..

$quotedsurname = $dbh->quote( $surname );

Then use $quotedsurname in your select statement.

$dbh->quote not only quotes the string correctly depending on what DB you are using, but also should correctly handle strings containing the quote character.
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Author Comment

by:Jattie
ID: 8204175
Thanks,

It worked!
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