5
votes
2answers
289 views

Is there a well-known name for this “poor man's ref. integrity” schema design pattern?

Is there a name for the following database schema design/pattern? My eventual goal is to find more literature about the subject. Today's cursory net search was too full of generic words to be able pin ...
0
votes
0answers
1k views

Storing currency with variable floating point in SQLite

We are working with currency and handle currencies from various countries. As a result, we may work with currencies that require no decimal values, two decimal places, three, sometimes four. We also ...
1
vote
0answers
336 views

OLAP Advanced custom filters date

How do i filter, in a Mondrian MDX Query, just the FACTS that have ocurred in a Range of Months over last 3 years? I need to make it dynamic so i can use parameters latter, so i need the following: ...
4
votes
1answer
1k views

Database under heavier load — all SQL queries start timing out after a period of hours/days

I make a web application which has experienced heavy growth in the past week and it appears my database is seizing up because of it. You can see that everything seemed to be OK until about 3AM this ...
0
votes
1answer
891 views

Why bulk loading a Vertica database table does not load all lines?

I have a small csv file I would like to bulk load into a Vertica 6.1 database table, this file has 92 lines. dbadmin=> COPY games FROM '/tmp/games.csv' DELIMITER ','; Rows Loaded ------------- ...
1
vote
2answers
683 views

SQL Server storage limits on Azure

Looking at SQL Server maximum capacity limits on here: http://msdn.microsoft.com/en-us/library/ms143432(v=sql.120).aspx Database size can be as big as 524,272 terabytes. Here, you could see VM size ...
2
votes
1answer
727 views

Comparing Agent Jobs on Two Servers

I'm currently building a process in Powershell where we can copy SQL Server Agent jobs from one server to another server just by entering the server names. The script uses the SMO library to obtain ...
0
votes
1answer
54 views

SQL Server 2008 R2 Resource Managment

I have a server running Windows Server 2008 R2 Enterprise 64Bit, with 256 GB RAM. I am running SQL Server 2008 R2. With normal usage, SQL Server is using about 232 GB of RAM. Occasionally it will ...
7
votes
2answers
3k views

How to drop empty tables

Is it possible to drop all empty tables from my huge database (mysql)? I'm looking for a sql command to automatically remove all those empty tables. Currently, I have 305 tables in my dataset, and ...
1
vote
1answer
2k views

error: must be owner of relation USER_ACCOUNT_ID_seq

I have granted priviledges to a user for testing in PostGreSql: GRANT USAGE ON SCHEMA "MySchema" TO "Tester"; GRANT ALL ON ALL TABLES IN SCHEMA "MySchema" TO "Tester"; GRANT ALL ON ALL SEQUENCES IN ...
3
votes
1answer
204 views

Jobs for cycling error logs

Couple of weeks ago I asked this question Error logs various questions and got the answer I needed. Based on the answer and some readings I want to create the following jobs: cycle the error log ...
0
votes
1answer
1k views

Attributes from an hstore-column as separate columns in a view?

Let's assume we have a table where it has two columns, one an ID and one an hstore column, which stores key/value pairs. You could query that column as such: SELECT name, attributes->'device' as ...
1
vote
1answer
957 views

What is lock pinger in mongodb

Can somebody explain me what is lock pinger in MongoDB [LockPinger] cluster XXXXXXX:27019 pinged successfully at Wed Feb 5 04:46:01 2014 by distributed lock pinger 'XXXXXX:27019/ip-XX-XX-XX-...
4
votes
1answer
2k views

How to view the query of another session in pg_stat_activity without being super user?

I have a Postgresql 9.2 database. Two users are created on this database. When I perform the following query as superuser, I can see everything. select * from pg_stat_activity However, is it ...
1
vote
1answer
60 views

What are the SQL standards [closed]

Some job descriptions mention required knowledge of SQL standards. What do they mean by that? I found something on wiki http://en.wikipedia.org/wiki/SQL#Standardization but I don't really know what ...
6
votes
1answer
403 views

Hierarchical structure with limited number of records per user

I am planning schema for an affiliate network. For all hierarchical queries I am using Postgres tablefunc extension but here is another problem. Any user can refer only 3 other users at max. So for ...
1
vote
1answer
493 views

Lock time not involved in MySQL slow query selection?

I wish to analyze some read-write contentions problems on a very huge table where writes are very fast, less than 1ms in most case. The point is that the contention makes those write queries sometimes ...
1
vote
1answer
53 views

Rebuild the Fulltextcatalog

I have a Database (80GB) that is able to store attachments. These attachments are full text indexed. For some reasons I had to rebuild the fulltext catalog and this 30 hours. Our business users ...
0
votes
1answer
496 views

What is the Difference between IN and Not IN performance wise?

I am new to database.I am having doubt that what is the difference between IN and NOT IN performance wise. When I am using IN, takes less time for the same query(Logically same query) when I use NOT ...
1
vote
1answer
3k views

InnoDB: very bad performance on INSERT/UPDATE

Lately I have really big problems with INSERTs and UPDATEs. On my website 80% of all queries are SELECTs but in query slow log there are only INSERTs and UPDATEs. My dedicated server has 32GB RAM, ...
-1
votes
1answer
734 views

delete in stored procedure [closed]

i am write this stored procedure to delete one row DELIMITER $$ CREATE DEFINER=`root`@`localhost` PROCEDURE `spr_StdDelete`(IN ID INT) BEGIN DELETE FROM students WHERE ID=...
0
votes
0answers
414 views

Installing oracle 9i on windows 7

Is it possible to install oracle 9i on windows 7 32 bit? And where can i download the standalone oracle http server?
3
votes
0answers
132 views

SQL server job has not run and also no entry logged in its history [closed]

I have scheduled a SQL job to run daily at 3am in the morning which creates a batch. It has not run today and i am also not able to fathom what's the reason behind its failure. There is no entry in ...
1
vote
1answer
568 views

SQL SERVER Virtual Log Files

I am new to SQL SERVER, could anyone please explain that why do we have VLFs' in T-LOG and why not have 1 T-log itself. I am aware that VLFs' are logical but my question is why VLFs'? what is the ...
0
votes
0answers
123 views

Replication with no network connectivity

I have SQL Servers on two isolated networks that cannot be connected directly. However, there is a need to keep data in sync between the two systems. Obviously SQL Server replication won't work. It ...
1
vote
2answers
3k views

Convert Login from Windows Authentication to SQL Server authentication?

I have an account that is setup for Windows authentication. The account is used by SSRS for running reports and has various permissions in multiple databases. I need to convert this account to use SQL ...
4
votes
2answers
4k views

Should I pause Mirroring and stop SQL Server services before running windows updates?

I am running Windows update on my SQL Servers (which are in a Principal-Mirror partnership, in High Safety mode). I am starting with updating the mirror and I was wondering, to increase safety, ...
5
votes
1answer
300 views

Why are zero length spaces being returned from a Union All against an empty table in SQL Server 2005 but not SQL Server 2012

Supporting an existing VB6 app with a SQL Server 2005 back end and we're migrating our database server to SQL Server 2012. Created a backup of the production database and restored it into a dev ...
0
votes
1answer
2k views

How to Convert a Table into XML Document

I have a table say SCOTT.DEPT and I want to convert it into an XML document. Is there anyway to accomplish this task? Kind Regards,
2
votes
2answers
368 views

Can somebody help me normalise this database/check my workings

I am new to database design/normalisation and functional dependencies. I have started a new database class in school this week and we have been given a worksheet that requires the following: This is ...
0
votes
1answer
817 views

I have delete database from mysql but storage is not freed

I have deleted multiple databases (schema) from mysql on amazon RDS but the storage is not freed, is there anything else I should do to free up the storage? I have a mysql database that the total ...
0
votes
0answers
145 views

Normalise the database, struggling to understand how i can normalise this

Cross post warning: I recently found dba.stack exchange so i thought it would be better to post there: http://dba.stackexchange.com/questions/58222/can-somebody-help-me-normalise-this-database-check-...
7
votes
1answer
5k views

MySQL 5.1 to 5.6: massive performance hit

Okay, this is possibly three questions. I want to move my existing MySQL 5.1 database using MyISAM to 5.6 using InnoDB for what I think are a host of obvious -- and possibly even good -- reasons. ...
2
votes
2answers
893 views

Log shipping - switchover and failback

We are doing a planned failover and switch back from the primary to DR with mirroring. We do not have a separate monitor instance. Please help me with the following 1. Is it possible to switch back ...
6
votes
2answers
10k views

Getting last modification date of a PostgreSQL database table

I'm trying to get when my table was modified by checking its file modification date as it is described in this answer. But the result is not always correct. The file modification date updates in ...
0
votes
0answers
141 views

Converting a Ruby on Rails site from MySQL to PostgreSQL? [closed]

Whats the best way to convert a MySQL database to PostgreSQL so that it does not create errors, and safely transferred? My developer is redeveloping my site and he suggested it use PostgreSQL instead....
1
vote
0answers
153 views

Replication topology advice - central subscriber

I'm seeking guidance and advice about how to set up replication in MSSQL to deal with the following criteria. We have a central server hosted at a data center - this is where our web app is located. ...
0
votes
1answer
445 views

linked server hanging

We've been using a linked server to an access database for close to a year now with little issue. Now when I run a select query against the linked server the query sits there and never finishes. ...
2
votes
0answers
187 views

Maintaining Referential Integrity with a Filestream enabled database

We have a production database which is filestream enabled and has grown, within a year, to about 20Gb as it stores documents. On many occasions we need to bring the live data back to UAT or Dev ...
4
votes
0answers
256 views

Rebuild Index Task removed WHERE clause from filtered index [closed]

I have a filter index setup on a table as follows: CREATE UNIQUE NONCLUSTERED INDEX [IX_TableName_Column_Filtered] ON [Schema].[TableName] ( [Column] ASC ) WHERE ([Column] IS NOT NULL) WITH (...
2
votes
2answers
8k views

Upgrading to SQL Server 2012 from SQL Server 2008

I have upgraded my SQL Server 2008 R2 Enterprise edition to SQL Server 2012. Even after upgrade I can see & use SQL Server 2008 R2 instance without any issue. Did my upgrade went fine? I can ...
0
votes
0answers
55 views

Is there any way i can bypass open_file_limit for mysql?

I am facing an issue where application is throwing an error that it cannot communicate with mysql server, Logs says that mysql has reached max open files limit. I checked my.cnf and this limit is ...
0
votes
0answers
294 views

ORA-13901 Object UNDOTBS01 was not found. ORA-06512: at “SYS.DBMS_SERVER_ALERT”, line 7

Oracle version is : 11.2.0.1 I have created alerting on every error occurring in database, and in this alert log I've found the following errors ORA-13901: Object UNDOTBS01 was not found. ORA-06512: ...
0
votes
1answer
1k views

Copying MySQL tables, InnoDB tables not recognized

I have to set up a database copy on my local computer. The problem is that that I have given just the raw database table files (.frm, .ibd, .MYD, .MYI). I created the database by creating a folder in ...
0
votes
2answers
178 views

Subquerying results in no row returned although records exist

I have two tables, namely Employees and Payments. Below is the contents of the two: The Employees table EmpID |EmpName ------ -------- 113 Harry The Payments table EmpID | Amount | Period ...
0
votes
1answer
181 views

Combine or Separate Tables

I have a single table that holds the following data columns: id = Auto Increment provider = Twitter or Facebook (depends what they use to login with) uid = User ID name = Their full name (e.g. ...
1
vote
0answers
247 views

How to join the tables in mysql to get wall messages and comments with name of person ? Only user and his friends messages

I have four tables in my mysql database as shown in the image url provided. I want to select data from the tables without duplication. I want to show messages and comments on wall according to the ...
3
votes
1answer
116 views

What does “unpackaged” mean in PostgreSQL extensions?

I've read the docs and a few blog postings, but I still don't get what the "unpackaged" tag in an extension file name is for. When would I use it and not use it?
3
votes
1answer
2k views

Tuning key_reads in MySQL

We are trying to tune our MySQL database (Myisam, 5.1.73) which is getting busy. We investigated Key_reads: $ mysqladmin ext -ri10 | grep Key_reads During a normal load we have the following ...
2
votes
1answer
337 views

What is the difference between a union and an “isa” disjoint relationship?

To me, it seems that a union and an "isa" disjoint relationship are the same. What is the difference between the two?

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