A common SQL habit is to use SELECT * on a query, because it’s tedious ... For instance, if you insert data into a table and then use UPDATE to change it, like I’ve just shown, that’s ...

You can update one or more rows of a table through a view, with some restrictions. See Updating PROC SQL and SAS/ACCESS Views. Any column that is not modified retains its original values, except in ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...