| hash values | Hash values |
| HAVING clause : GROUP BY and | The HAVING clause: selecting groups of data |
| HAVING clause : logical operators | The HAVING clause: selecting groups of data |
| HAVING clause : without aggregates | The HAVING clause: selecting groups of data |
| heap size : Java | How memory is used |
| high availability : database server | Running the server outside the current session |
| high availability : live backups | Using a live backup for machine redundancy |
| HOLDLOCK keyword : Transact-SQL | Writing compatible queries |
| how locking is implemented | How Adaptive Server Anywhere implements locking |