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MAINTAIN MVGROUP................................................................................................................184
Examples of MAINTAIN...............................................................................................................184
POPULATE INDEX Utility.................................................................................................................186
Syntax Description of POPULATE INDEX....................................................................................186
Considerations for POPULATE INDEX........................................................................................186
Examples of POPULATE INDEX...................................................................................................186
PURGEDATA Utility...........................................................................................................................187
Syntax Description of PURGEDATA.............................................................................................187
Considerations for PURGEDATA..................................................................................................187
Examples of PURGEDATA............................................................................................................187
4 SQL Language Elements...........................................................................................189
Character Sets......................................................................................................................................190
Columns..............................................................................................................................................191
Column References........................................................................................................................191
Derived Column Names................................................................................................................191
Column Default Settings................................................................................................................191
Examples of Derived Column Names...........................................................................................191
Constraints..........................................................................................................................................193
Creating, Adding, and Dropping Constraints on SQL Tables.......................................................193
Constraint Names.....................................................................................................................193
Correlation Names..............................................................................................................................194
Explicit Correlation Names...........................................................................................................194
Implicit Correlation Names...........................................................................................................194
Examples of Correlation Names....................................................................................................194
Database Objects.................................................................................................................................195
Ownership.....................................................................................................................................195
Database Object Names......................................................................................................................196
Logical Names for SQL Objects.....................................................................................................196
SQL Object Namespaces................................................................................................................196
Data Types...........................................................................................................................................197
Comparable and Compatible Data Types.....................................................................................199
Character Data Types...............................................................................................................199
Datetime Data Types................................................................................................................199
Interval Data Types...................................................................................................................200
Numeric Data Types.................................................................................................................200
Character String Data Types..........................................................................................................200
Considerations for Character String Data Types.....................................................................201
Datetime Data Types......................................................................................................................202
Considerations for Datetime Data Types.................................................................................202
Interval Data Types.............................................................................................................................204
Considerations for Interval Data Types.........................................................................................204
Numeric Data Types ...........................................................................................................................205
Expressions..........................................................................................................................................208
Character Value Expressions.........................................................................................................208
Examples of Character Value Expressions...............................................................................208
Datetime Value Expressions..........................................................................................................210
Considerations for Datetime Value Expressions......................................................................211
Examples of Datetime Value Expressions................................................................................211
Interval Value Expressions............................................................................................................213
Considerations for Interval Value Expressions........................................................................214
Examples of Interval Value Expressions..................................................................................215
Numeric Value Expressions...........................................................................................................217
Considerations for Numeric Value Expressions......................................................................217
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