Any column that is not modified retains its original values, except in certain queries using the CASE expression. See CASE expression for a description of CASE expressions.. To add, drop, or modify a ...

If you only want to update values in table A when there are matching records in table B, then an inner join is the way to go. If you have calculations that need to vary based on optional data, the ...

SQL is the leading language for developing and querying databases, but it has a few quirks.In my last article, I shared 7 SQL mistakes to avoid.Now, let’s take a look at 9 best practices for ...

SQL lets you use one command to quickly create a new table containing a subset of records from a larger table while working in Access. Sound complicated? It's not, as Mary Ann Richardson shows us.