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

Just for kicks and giggles, I put the SELECT . into SQL Server and it gave me Invalid column prefix '': No table name specified - you can, however, use a table alias so that it's SELECT a., [column list from table b] with a proper JOIN.

Learn how to set the default value for an HTML <select> element using JavaScript or HTML techniques.

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

I have seen many queries with something as follows: SELECT 1 FROM table What does this 1 mean, how will it be executed, and what will it return? Also, in what type of scenarios can this be used?

Is it possible to do a select statement that takes only NOT NULL values? Right now I am using this: SELECT * FROM table And then I have to filter out the null values with a php loop. Is there a ...