[support] Place holders in SQL query

[Warren Vail]

This syntax is a hold over from the old C programming language and I 
have seen several of the newer Drupal books recommending it, not sure if 
there is a preference in D7.  but essentially what nan wich (intrigued 
by the name) says is correct, if you build your query string it (as 
should all strings) begin with a single or double quote and end with the 
same.  I personally can't see any problem coding multiple %s and %d 
placeholders in one string then coding them as a list of variables, but 
don't forget that your string and list need to be passed to a function 
(fscanf comes to mind), but I believe the new drupal get db functions  
(sorry I don't remember their names) do this.

Warren Vail

On 4/10/2011 5:55 PM, Austin Einter wrote:
> 1.
> When we do a SQL query, if we want to pass value to query, we make use 
> %d for integers or %s for strings.
> Similarly do we have any place holders for arrays.
> 2.
> I am facing a below typical problem, can somebody tell me what should 
> I do?
> Below query works fine.
> SELECT skillid FROM {resubmt_skills}  WHERE resubmt_skills.skillname 
> IN (*'PHP', 'HTML', 'SQL'*)
> But in above query search string *'PHP', 'HTML', 'SQL' *is hard coded.
> I want to make the query generic.
> Lets say in custom search form, user entered search string PHP, 
> Telecom, HTML,, so how can I write a generic query.
> Thanks
> Austin

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