clustered-index

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Add Primary Key to a table with existing clustered index

I have to work with a database to do reporting The DB is quite big : 416 055 104 rows Each row is very light though, just booleans and int ids.[详细]

2023-01-10 15:28 分类：问答
Is a CLUSTER INDEX desireable when loading a sorted loadfile into a new table?

INFORMIX-SE: My users periodically run an SQL script [REORG.SQL] which unloads all rows from a table in sorted order to two separate files (actives and inactives), drops the table, re-creates the tab[详细]

2023-01-10 13:30 分类：问答
H2 database: clustered indexes support

I use H2 database for environmental data which contains lots of time series. Time series are simply measurement values of sensors which are recorded in database periodically (say once per hour).[详细]

2023-01-08 17:07 分类：问答
Setting indexed columns on a custom SQL table

I\'ve read about primary, unique, clustered indexes etc. But I need to understand it via an example.[详细]

2023-01-08 03:51 分类：问答
customer.pk_name joining transactions.fk_name vs. customer.pk_id [serial] joining transactions.fk_id [integer]

Pawnshop Application (any RDBMS): one-to-many relationship where each customer (master) can have many transactions (detail).[详细]

2023-01-04 02:11 分类：问答
Clustered index - multi-part vs single-part index and effects of inserts/deletes

This question is about what happens with the reorganizing of data in a clustered index when an insert is done. I assume that it should be more expensive to do inserts on a table which has a clustered[详细]

2023-01-01 12:26 分类：问答
Database: Help me with correct index(es) for a table and query

I am running some queries in my database and want to increase the performance and have created some indexes but I still think that the response time is to great so I want to see if I can create a bett[详细]

2022-12-31 05:36 分类：问答
Covering Index versus Clustered Index (Database Index)

I\'m working on a database system and it\'s indexes, but I\'m having a really hard time seing the clear difference between a covering index and a clustered index.[详细]

2022-12-30 18:31 分类：问答
SQL Server Clustered Index: (Physical) Data Page Order

I am struggling understanding what a clustered index in SQL Server 2005 is. I read the MSDN article Clustered Index Structures (among other things) but I am still unsure if I understand it correctly.[详细]

2022-12-28 23:49 分类：问答
Is it bad to have a non-clustered index that contains the primary key from the clustered index?

If you have a table with a clustered index on th开发者_如何学Pythone Primary Key (int), is it redundant and bad to have one (ore more) non-clustered indexes that include that primary key column as one[详细]

2022-12-28 23:45 分类：问答