本部分介绍随PostgreSQL分发的客户端编程接口。每章内容均可独立阅读。 有许多单独分发的外部客户端编程接口。它们包含自己的文档（Appendix H 列出了一些较受欢迎的接口）。本部分的读者应熟悉使用SQL操作和查询数据库（参见 Part II），当然还应熟悉所选的编程语言。
Table of Contents
information_schema_catalog_nameadministrable_role_authorizationsapplicable_rolesattributescharacter_setscheck_constraint_routine_usagecheck_constraintscollationscollation_character_set_applicabilitycolumn_column_usagecolumn_domain_usagecolumn_optionscolumn_privilegescolumn_udt_usagecolumnsconstraint_column_usageconstraint_table_usagedata_type_privilegesdomain_constraintsdomain_udt_usagedomainselement_typesenabled_rolesforeign_data_wrapper_optionsforeign_data_wrappersforeign_server_optionsforeign_serversforeign_table_optionsforeign_tableskey_column_usageparametersreferential_constraintsrole_column_grantsrole_routine_grantsrole_table_grantsrole_udt_grantsrole_usage_grantsroutine_column_usageroutine_privilegesroutine_routine_usageroutine_sequence_usageroutine_table_usageroutinesschematasequencessql_featuressql_implementation_infosql_partssql_sizingtable_constraintstable_privilegestablestransformstriggered_update_columnstriggersudt_privilegesusage_privilegesuser_defined_typesuser_mapping_optionsuser_mappingsview_column_usageview_routine_usageview_table_usageviews