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...
The simple difference between select Into and Insert Into is: --> Select Into don't need existing table. If you want to copy table A data, you just type Select * INTO [tablename] from A.
<select onChange="javascript:doSomething();"> <option>A</option> <option>B</option> <option>C</option> </select> 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 ...
Select column is more performatic of select *, but if you is developing an oriented object system, then you will like use object.properties and you can need a properties in any part of apps, then you will need write more methods to get properties in special situations if you don't use select * and populate all properties.
