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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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>Data Definition</TITLE
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><DIV
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><H1
><A
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>Chapter 5. Data Definition</H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
>5.1. <A
HREF="ddl-basics.html"
>Table Basics</A
></DT
><DT
>5.2. <A
HREF="ddl-default.html"
>Default Values</A
></DT
><DT
>5.3. <A
HREF="ddl-constraints.html"
>Constraints</A
></DT
><DD
><DL
><DT
>5.3.1. <A
HREF="ddl-constraints.html#DDL-CONSTRAINTS-CHECK-CONSTRAINTS"
>Check Constraints</A
></DT
><DT
>5.3.2. <A
HREF="ddl-constraints.html#AEN2471"
>Not-Null Constraints</A
></DT
><DT
>5.3.3. <A
HREF="ddl-constraints.html#DDL-CONSTRAINTS-UNIQUE-CONSTRAINTS"
>Unique Constraints</A
></DT
><DT
>5.3.4. <A
HREF="ddl-constraints.html#DDL-CONSTRAINTS-PRIMARY-KEYS"
>Primary Keys</A
></DT
><DT
>5.3.5. <A
HREF="ddl-constraints.html#DDL-CONSTRAINTS-FK"
>Foreign Keys</A
></DT
><DT
>5.3.6. <A
HREF="ddl-constraints.html#DDL-CONSTRAINTS-EXCLUSION"
>Exclusion Constraints</A
></DT
></DL
></DD
><DT
>5.4. <A
HREF="ddl-system-columns.html"
>System Columns</A
></DT
><DT
>5.5. <A
HREF="ddl-alter.html"
>Modifying Tables</A
></DT
><DD
><DL
><DT
>5.5.1. <A
HREF="ddl-alter.html#DDL-ALTER-ADDING-A-COLUMN"
>Adding a Column</A
></DT
><DT
>5.5.2. <A
HREF="ddl-alter.html#DDL-ALTER-REMOVING-A-COLUMN"
>Removing a Column</A
></DT
><DT
>5.5.3. <A
HREF="ddl-alter.html#DDL-ALTER-ADDING-A-CONSTRAINT"
>Adding a Constraint</A
></DT
><DT
>5.5.4. <A
HREF="ddl-alter.html#DDL-ALTER-REMOVING-A-CONSTRAINT"
>Removing a Constraint</A
></DT
><DT
>5.5.5. <A
HREF="ddl-alter.html#AEN2786"
>Changing a Column's Default Value</A
></DT
><DT
>5.5.6. <A
HREF="ddl-alter.html#AEN2796"
>Changing a Column's Data Type</A
></DT
><DT
>5.5.7. <A
HREF="ddl-alter.html#AEN2806"
>Renaming a Column</A
></DT
><DT
>5.5.8. <A
HREF="ddl-alter.html#AEN2813"
>Renaming a Table</A
></DT
></DL
></DD
><DT
>5.6. <A
HREF="ddl-priv.html"
>Privileges</A
></DT
><DT
>5.7. <A
HREF="ddl-schemas.html"
>Schemas</A
></DT
><DD
><DL
><DT
>5.7.1. <A
HREF="ddl-schemas.html#DDL-SCHEMAS-CREATE"
>Creating a Schema</A
></DT
><DT
>5.7.2. <A
HREF="ddl-schemas.html#DDL-SCHEMAS-PUBLIC"
>The Public Schema</A
></DT
><DT
>5.7.3. <A
HREF="ddl-schemas.html#DDL-SCHEMAS-PATH"
>The Schema Search Path</A
></DT
><DT
>5.7.4. <A
HREF="ddl-schemas.html#DDL-SCHEMAS-PRIV"
>Schemas and Privileges</A
></DT
><DT
>5.7.5. <A
HREF="ddl-schemas.html#DDL-SCHEMAS-CATALOG"
>The System Catalog Schema</A
></DT
><DT
>5.7.6. <A
HREF="ddl-schemas.html#DDL-SCHEMAS-PATTERNS"
>Usage Patterns</A
></DT
><DT
>5.7.7. <A
HREF="ddl-schemas.html#DDL-SCHEMAS-PORTABILITY"
>Portability</A
></DT
></DL
></DD
><DT
>5.8. <A
HREF="ddl-inherit.html"
>Inheritance</A
></DT
><DT
>5.9. <A
HREF="ddl-partitioning.html"
>Partitioning</A
></DT
><DD
><DL
><DT
>5.9.1. <A
HREF="ddl-partitioning.html#DDL-PARTITIONING-OVERVIEW"
>Overview</A
></DT
><DT
>5.9.2. <A
HREF="ddl-partitioning.html#DDL-PARTITIONING-IMPLEMENTATION"
>Implementing Partitioning</A
></DT
><DT
>5.9.3. <A
HREF="ddl-partitioning.html#DDL-PARTITIONING-MANAGING-PARTITIONS"
>Managing Partitions</A
></DT
><DT
>5.9.4. <A
HREF="ddl-partitioning.html#DDL-PARTITIONING-CONSTRAINT-EXCLUSION"
>Partitioning and Constraint Exclusion</A
></DT
><DT
>5.9.5. <A
HREF="ddl-partitioning.html#DDL-PARTITIONING-ALTERNATIVES"
>Alternative Partitioning Methods</A
></DT
><DT
>5.9.6. <A
HREF="ddl-partitioning.html#DDL-PARTITIONING-CAVEATS"
>Caveats</A
></DT
></DL
></DD
><DT
>5.10. <A
HREF="ddl-foreign-data.html"
>Foreign Data</A
></DT
><DT
>5.11. <A
HREF="ddl-others.html"
>Other Database Objects</A
></DT
><DT
>5.12. <A
HREF="ddl-depend.html"
>Dependency Tracking</A
></DT
></DL
></DIV
><P
>  This chapter covers how one creates the database structures that
  will hold one's data.  In a relational database, the raw data is
  stored in tables, so the majority of this chapter is devoted to
  explaining how tables are created and modified and what features are
  available to control what data is stored in the tables.
  Subsequently, we discuss how tables can be organized into
  schemas, and how privileges can be assigned to tables.  Finally,
  we will briefly look at other features that affect the data storage,
  such as inheritance, views, functions, and triggers.
 </P
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