I am designing a new laboratory database. My primary data tables will have at least id (PK NUMBER) and created_on (DATE). Also, for any two entries, the entry with a higher id will have a later created_on date. I plan to partition by created_on to increase performance on recently entered data. Since the columns increase together, t...
Hi, Our central database is to be synchronized in a hub & spoke fashion. We need to be able to partition the data in a way that client data is replicated locally only to that client. Has anyone faced this problem? MSF provides sync scopes - declarations of tables are to be sycned, with the option to specify a filtercolumn and filter ...
Hi Guys, I'm trying to create partitions in one big table, but I'm getting this error: 1505 - Partition management on a not partitioned table is not possible There is any command to convert the table? Or do I have to create a new one and import all data? There is any problem when using Partitioning with Replication? Thanks in advanc...
I'm considering various ways to partition my data in SQL Server. One approach I'm looking at is to partition a particular huge table into 8 partitions, then within each of these partitions to partition on a different partition column. Is this even possible in SQL Server, or am I limited to definining one parition column+function+scheme...
In which case we should use table partitioning? ...
I am writing a data warehouse, using MySQL as the back-end. I need to partition a table based on two integer IDs and a name string. A more concrete example would be to assume that I am storing data about a school. I want to partition the school_data table based on COMPOSITE 'Key' based on the following: school id (integer) course_id (i...
I am writing a data warehouse, using MySQL as the back-end. I need to partition a table based on two integer IDs and a name string. I have read (parts of) the mySQL documentation regarding partitioning, and it seems the most appropriate partitioning scheme in this scenario would be either a HASH or KEY partitioning. I have elected for ...
I'm wondering if anyone out there has run into a realistic max number of table partitions in sql server 2005. I know that the docs state that there is a limit of 1000 partitions per table, but I have a hard time believing that, without a lot of hacking and mucking about, that 1000 partitions would be all that usable. Any help is appreci...
I am working with a half dozen DBs. The DBs all have the same schemas, the same SPs, etc. Speaking to the person who originally designed the DBs, a big part of the motivation for using many DBs was efficiency; the alternative would be to add a column to pretty much every table and sp in the database indicating which set of data was bei...
Our database schema is stored in a single file that is intended for production use but we also use when running functional tests on our local boxes. We drop the database and rebuild it from this file and then add a known set of test data. All was working well. Recently we added some performance improvements. The trouble came when we ...
Hello, So I'm currently working on a project that involves the collection and storing of some huge datasets (as far as what I'm used to working with). The data essentially consists of meta information, and then actual values (where the values are trended over time). The meta information itself is relatively large, but nothing huge, I w...
I want to partition a very large PostgreSQL 8.3 database. Quoting the manual, Partitioning can provide several benefits: ... Seldom-used data can be migrated to cheaper and slower storage media. What's the right way to relocate tables to another media or computer? Adam ...
Hi, I have a huge database which holds pairs of numbers (A,B), each ranging from 0 to 10,000 and stored as floats. e.g., (1, 9984.4), (2143.44, 124.243), (0.55, 0), ... Since the PostgreSQL table which stores these pairs grew quite large, I have decided to partition it into inheriting sub-tables. I intend to create 100 such tables, ...
Hi, I have just tried to configure partitions based on date, but it seems that mysql still includes a partition with no relevant data. It will use the relevant partition but also include the oldest for some reason. Am I doing it wrong? The version is 5.1.44 (MyISAM) I first added a few partitions based on "day", which is of type "date...
When performing many inserts into a database I would usually have code like this: using (var connection = new SqlConnection(connStr)) { connection.Open(); foreach (var item in items) { var cmd = new SqlCommand("INSERT ...") cmd.ExecuteNonQuery(); } } I now want to shard the database and therefore need to choose the c...
just want to verify that database partition is implemented only at the database level, when we query a partitioned table, we still do our normal query, nothing special with our queries, the optimization is performed automatically when parsing the query, is that correct? e.g. we have a table called 'address' with a column called 'country...
I have a table of Animals: Animals Id Name 1 Dog 2 Cat 3 Rabbit Each animal has a portfolio therefore I have two methods of defining the database tables. METHOD 1: Portfolio Id AnimalId Date 1 1 01/01/2001 2 2 20/03/2009 3 3 05/03/2009 4 1 01/04/2005 METHOD 2: DogPortfol...
I've been working with SQL Server for the better part of a decade, and this grouping (or partitioning, or ranking...I'm not sure what the answer is!) one has me stumped. Feels like it should be an easy one, too. I'll generalize my problem: Let's say I have 3 employees (don't worry about them quitting or anything...there's always 3), a...
I am trying to produce a results table with the last completed course date for each course code, as well as the last completed course code overall for each employee. Below is my query: SELECT employee_number, MAX(course_completion_date) OVER (PARTITION BY course_code) AS max_course_date, MAX(course_completion_d...
I installed Oracle 10g Enterprise Editions onto Windows XP. It appeared that Partitions were installed as part of the default install, however the partitions functionality is not enabled. I can find instructions for enabling partitions on Unix/Linux, but not Windows. Has anybody had any success enabling partitions in 10g EE on their l...