| hash anti-semijoin: query execution algorithms | Hash antisemijoin |
| hash B-tree indexes: about | Hash B-tree indexes |
| hash distinct: query execution algorithms | Hash distinct |
| hash group by: query execution algorithms | Hash group by |
| hash joins: query execution algorithms | Hash join Hash semijoin Hash antisemijoin |
| hash maps: query execution algorithms | Bloom filter |
| hash not exists: query execution algorithms | Hash antisemijoin |
| hash semijoin: query execution algorithms | Hash semijoin |
| hash values: indexes | Hash B-tree indexes |
| 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: performance | Predicate analysis |
| HAVING clause: selecting groups of data | The HAVING clause: selecting groups of data |
| HAVING clause: subqueries | Subqueries in the HAVING clause |
| HAVING clause: with and without aggregates | The HAVING clause: selecting groups of data |
| hide directive: using | Using FOR XML EXPLICIT |
| hierarchical data structures | Selecting hierarchical data Parts explosion problems |
| histograms: about | Optimizer estimates |
| histograms: updating | Updating column statistics |
| HOLDLOCK keyword: Transact-SQL | Writing compatible queries |
| how data can become invalid | How data can become invalid |
| how database contents change | How database contents change |
| how joins work | How joins work |
| how locking is implemented | Two-phase locking |
| how locking works | How locking works |
| how NULL affects Transact-SQL outer joins | How NULL affects Transact-SQL joins |
| how queries with group by are executed | How queries with GROUP BY are executed |
| how subqueries work | How subqueries work |
| how the optimizer works | How the optimizer works |