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.
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
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).
I\'ve read about primary, unique, clustered indexes etc. But I need to understand it via an example.
Pawnshop Application (any RDBMS): one-to-many relationship where each customer (master) can have many transactions (detail).
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
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
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.
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.
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
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