| on |  | 
| 1 (Function) | Database.Relational.Monad.Class, Database.Relational | 
| 2 (Function) | Database.Relational.Arrow | 
| on' | Database.Relational.Set, Database.Relational, Database.Relational.Arrow | 
| OperatorContext | Database.Relational.Projectable.Unsafe | 
| or' | Database.Relational.Projectable, Database.Relational, Database.Relational.Arrow | 
| Order | Database.Relational.SqlSyntax, Database.Relational, Database.Relational.Arrow | 
| orderBy |  | 
| 1 (Function) | Database.Relational.Monad.Trans.Ordering, Database.Relational | 
| 2 (Function) | Database.Relational.Arrow | 
| orderBy' |  | 
| 1 (Function) | Database.Relational.Monad.Trans.Ordering, Database.Relational | 
| 2 (Function) | Database.Relational.Arrow | 
| OrderColumn | Database.Relational.SqlSyntax | 
| OrderedQuery | Database.Relational.Monad.Type, Database.Relational, Database.Relational.Arrow | 
| Orderings |  | 
| 1 (Type/Class) | Database.Relational.Monad.Trans.Ordering, Database.Relational | 
| 2 (Type/Class) | Database.Relational.Arrow | 
| orderings | Database.Relational.Monad.Trans.Ordering | 
| OrderingTerm | Database.Relational.SqlSyntax | 
| over |  | 
| 1 (Function) | Database.Relational.Monad.Aggregate, Database.Relational | 
| 2 (Function) | Database.Relational.Arrow | 
| OverWindow | Database.Relational.Context, Database.Relational, Database.Relational.Arrow |