Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple ... rogue field in a column associated with every possible result from the rest of the query ...

SELECT options refine results As we saw in the last article, the SQL SELECT statement ... You can also use this statement while selecting multiple column names and use multiple columns to group ...

Search engines are integral features to any well designed website, but how well does your search engine work? Most simple search engines work by querying one column of a database for the search terms.