<p>Hopefully, I can get answers for each database server.</p>

<p>For an outline of how indexing works check out: <a href="https://stackoverflow.com/questions/1108/how-does-database-indexing-work">How does database indexing work?</a></p>

The following is SQL92 standard so should be supported by the majority of RDMBS that use SQL:
```
```
CREATE INDEX [index name] ON [table name] ( [column name] )
```
```