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Russian Progress User Group • Index
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Index

Добавлено: 15 авг 2006, 07:34
Evgeniy
Не нашел тут статьи про индексы.
Это хрустно. Поэтому начинаю готовить статью. 8)

Первый вопрос такой - "несколько индексов за раз?" :o

Прогресс сам может подцепить более одного индекса в выборке, а программист посредствам use-index может указать только один индекс?

Второй вопрос "составные индексы - зло?" :sad:

На много ли составные индексы дают больше выигрыша, чем несколько одинарных?

ведь, IMHO
1) содержать и пересчитывать составной индекс - более ресурсоёмкое занятие, чем содержание несколько простых?
2) несколько простых индексов предоставят большую гибкость их использования при составлении запросов.
=> IMHO, составные индексы должны быть крайне редки...

Re: Index

Добавлено: 15 авг 2006, 09:32
bulklodd

Добавлено: 31 янв 2008, 07:32
Старожыл

Re: Index

Добавлено: 31 янв 2008, 10:00
George

Re: Index

Добавлено: 31 янв 2008, 10:05
George

Добавлено: 31 янв 2008, 22:08
dmitri

Добавлено: 07 фев 2008, 13:23
webber