administrator has not created a Post- greSQL user account for you. (PostgreSQL user accounts are distinct from operating system user accounts.) If you are the administrator, see Chapter 21 for help creating SELECT DISTINCT city FROM weather; city --------------- Hayward San Francisco (2 rows) Here again, the result row ordering might vary. You can ensure consistent results by using DISTINCT and and ORDER BY together: 2 SELECT DISTINCT city 2 In some database systems, including older versions of PostgreSQL, the implementation of DISTINCT automatically orders the rows and so ORDER BY is unnecessary

the administrator has not created a PostgreSQL user account for you. (PostgreSQL user accounts are distinct from operating system user accounts.) If you are the administrator, see Chapter 21 for help creating SELECT DISTINCT city FROM weather; city --------------- Hayward San Francisco (2 rows) Here again, the result row ordering might vary. You can ensure consistent results by using DISTINCT and and ORDER BY together: 2 SELECT DISTINCT city FROM weather ORDER BY city; 2.6. Joins Between Tables Thus far, our queries have only accessed one table at a time. Queries can access multiple tables

the administrator has not created a PostgreSQL user account for you. (PostgreSQL user accounts are distinct from operating system user accounts.) If you are the administrator, see Chapter 21 for help creating temp_lo; You can request that duplicate rows be removed from the result of a query: SELECT DISTINCT city 10 The SQL Language FROM weather; city --------------- Hayward San Francisco result row ordering might vary. You can ensure consistent results by using DISTINCT and ORDER BY together: 2 SELECT DISTINCT city FROM weather ORDER BY city; 2.6. Joins Between Tables Thus far

.....................................................................................117 7.3.3. DISTINCT ............................................................................................... .........................................................................481 15.3.3. Parallel Aggregation .......................................................................................481 15.3 ........................................................................1097 36.10.4. Partial Aggregation .....................................................................................1098 36.10

administrator has not created a Post- greSQL user account for you. (PostgreSQL user accounts are distinct from operating system user accounts.) If you are the administrator, see Chapter 21 for help creating SELECT DISTINCT city FROM weather; city --------------- Hayward San Francisco (2 rows) Here again, the result row ordering might vary. You can ensure consistent results by using DISTINCT and and ORDER BY together: 2 SELECT DISTINCT city FROM weather ORDER BY city; 2.6. Joins Between Tables Thus far, our queries have only accessed one table at a time. Queries can access multiple tables

.....................................................................................108 7.3.3. DISTINCT ............................................................................................... .........................................................................454 15.3.3. Parallel Aggregation ................................................................................454 x 15.3.4 Aggregates.......................................................................1035 36.10.4. Partial Aggregation ..............................................................................1036 36.10.5. Support

the administrator has not created a PostgreSQL user account for you. (PostgreSQL user accounts are distinct from operating system user accounts.) If you are the administrator, see Chapter 21 for help creating temp_lo; You can request that duplicate rows be removed from the result of a query: SELECT DISTINCT city 10 The SQL Language FROM weather; city --------------- Hayward San Francisco result row ordering might vary. You can ensure consistent results by using DISTINCT and ORDER BY together: 2 SELECT DISTINCT city FROM weather ORDER BY city; 2.6. Joins Between Tables Thus far

administrator has not created a Post- greSQL user account for you. (PostgreSQL user accounts are distinct from operating system user accounts.) If you are the administrator, see Chapter 21 for help creating SELECT DISTINCT city FROM weather; city --------------- Hayward San Francisco (2 rows) Here again, the result row ordering might vary. You can ensure consistent results by using DISTINCT and and ORDER BY together: 2 SELECT DISTINCT city FROM weather ORDER BY city; 2.6. Joins Between Tables Thus far, our queries have only accessed one table at a time. Queries can access multiple tables

the administrator has not created a PostgreSQL user account for you. (PostgreSQL user accounts are distinct from operating system user accounts.) If you are the administrator, see Chapter 21 for help creating temp_lo; You can request that duplicate rows be removed from the result of a query: SELECT DISTINCT city 10 The SQL Language FROM weather; city --------------- Hayward San Francisco result row ordering might vary. You can ensure consistent results by using DISTINCT and ORDER BY together: 2 SELECT DISTINCT city FROM weather ORDER BY city; 2.6. Joins Between Tables Thus far

administrator has not created a Post- greSQL user account for you. (PostgreSQL user accounts are distinct from operating system user accounts.) If you are the administrator, see Chapter 21 for help creating SELECT DISTINCT city FROM weather; city --------------- Hayward San Francisco (2 rows) Here again, the result row ordering might vary. You can ensure consistent results by using DISTINCT and and ORDER BY together: 2 SELECT DISTINCT city FROM weather ORDER BY city; 2.6. Joins Between Tables Thus far, our queries have only accessed one table at a time. Queries can access multiple tables