Select The Two Characteristics Of Advertising

If I just need 2/3 columns and I query SELECT * instead of providing those columns in select query, is there any performance degradation regarding more/less I/O or memory? The network overhead mig...

I have a table containing a unique ID field. Another field (REF) contains a reference to another dataset's ID field. Now I have to select all datasets where REF points to a dataset that doesn't exi...

sql - How to do a Select in a Select - Stack Overflow

This Stack Overflow thread discusses the possibility of adding an option separator for select elements in HTML and provides insights from developers.

I want to do a select request that perform a first select and then use that selection to perform a second select. I made a 1st version using a temp table but I would like to know - is there is a wa...

sql server - SQL select from a select query - Stack Overflow

Add an attribute data-selected to each element and set the value (s) to the value of the option you wish to have selected. Use javascript's querySelectorAll() to select all elements that have the custom attribute you just added.

How can I set the default value for an HTML element?

Now, doSomething() only gets triggered when the selection changes. I want to trigger doSomething() when the user selects any option, possibly the same one again. I have tried using an "onClick" handler, but that gets triggered before the user starts the selection process. So, is there a way to trigger a function on every select by the user? Update: The answer suggested by Darryl seemed to work ...