HP Neoview SQL Reference Manual page 9

Considerations for UNION...........................................................................................................154
Characteristics of the UNION Columns..................................................................................154
ORDER BY Clause and the UNION Operator.........................................................................155
GROUP BY Clause, HAVING Clause, and the UNION Operator ..........................................155
UNION ALL and Associativity................................................................................................155
Access Modes and the UNION Operator.................................................................................155
Examples of SELECT.....................................................................................................................156
Examples for Embedded INSERT..................................................................................................161
SET SCHEMA Statement....................................................................................................................163
Syntax Description of SET SCHEMA............................................................................................163
Consideration for SET SCHEMA...................................................................................................163
Examples of SET SCHEMA...........................................................................................................163
SET TABLE TIMEOUT Statement.......................................................................................................164
Syntax Description of SET TABLE TIMEOUT...............................................................................164
Considerations for SET TABLE TIMEOUT....................................................................................165
Examples of SET TABLE TIMEOUT..............................................................................................165
SET TRANSACTION Statement.........................................................................................................166
Syntax Description of SET TRANSACTION.................................................................................166
Considerations for SET TRANSACTION......................................................................................167
Implicit Transactions................................................................................................................167
Explicit Transactions.................................................................................................................168
Degree of Concurrency.............................................................................................................168
Effect on Utilities......................................................................................................................168
Example of SET TRANSACTION..................................................................................................168
UPDATE Statement.............................................................................................................................169
Syntax Description of UPDATE.....................................................................................................169
Considerations for UPDATE..........................................................................................................171
Authorization Requirements....................................................................................................171
Transaction Initiation and Termination....................................................................................171
Isolation Levels of Transactions and Access Options of Statements........................................171
Conflicting Updates in Concurrent Applications....................................................................171
Requirements for Data in Row.................................................................................................172
Reporting of Updates...............................................................................................................172
Updating Character Values......................................................................................................172
SET Clause Restrictions and Error Cases.................................................................................172
SET ON ROLLBACK Considerations......................................................................................173
SET ON ROLLBACK Restrictions............................................................................................173
Examples of UPDATE....................................................................................................................173
UPDATE STATISTICS Statement........................................................................................................175
Syntax Description of UPDATE STATISTICS................................................................................175
Considerations for UPDATE STATISTICS.....................................................................................177
Physical Statistics......................................................................................................................177
Using Statistics.........................................................................................................................177
Authorization and Locking......................................................................................................177
Transactions..............................................................................................................................177
Generating and Clearing Statistics for Columns......................................................................178
Column Lists and Access Plans................................................................................................178
Examples of UPDATE STATISTICS...............................................................................................178
3 SQL Utilities................................................................................................................181
Privileges Required to Execute Utilities .............................................................................................181
MAINTAIN Command.......................................................................................................................182
Syntax Description of MAINTAIN................................................................................................182
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