3
votes
1answer
136 views

How to share resources among accounts?

Using google doc, I am able to share my documents with others. I wonder how they implement it underlying in terms of DB design? The simplest way I imagine is to use a joining table which keeps a ...
1
vote
1answer
380 views

Restore a Single File from FileStream

We have an document management application uses SQL Server 2012 to store document index information and uses a Windows file share to store the documents. We are working on migrating to store the ...
1
vote
1answer
173 views

InnoDB Failure of some kind

I have MySQL 5.5 installed. I tried to install Joolma but it failed. I went into their sql and replace EGNINE=InnoDB with MyISAM and the install worked. InnoDB is listed under SHOW ENGINES; Any idea ...
4
votes
1answer
1k views

When SQL Server uses Multi Page Allocations

What are the consumers of MPA (multi page allocations) in SQL Server? I know data pages are always 8K. Is there a situation where data/index page make use of MPA? It makes sense that execution plans ...
0
votes
1answer
3k views

Error in trigger: table is mutating

CREATE OR REPLACE TRIGGER "TRANSACTION" before update of totalunitsbought on SIPHOLDER referencing new AS NEW old AS OLD for each row begin declare mportfolioname varchar2(20); ...
4
votes
3answers
6k views

Most efficient and practical way to store time values (HH:MM) in Oracle that makes it easily searchable

I have a set of starting and ending times that I need to store in an Oracle database. I need to store them in a manner that makes them easily searchable (i.e. a typical search is find all rows where ...
0
votes
1answer
50 views

Creating database/tables in SequelPro (or MySQL) from External FTP Server

I just started getting a backup file (*.7z) from the folks that run our database once a week. They're sending it to me through an FTP server (I use FileZilla) -- but the file is pretty huge: 5.8 ...
0
votes
1answer
96 views

Am I overengineering MySQL?

On my project, I have to make difference between registered users, and simple visitors. Both of them can set their own properites, specified in accounts and visitors table. I identify them by cookie, ...
-1
votes
1answer
1k views

How to merge data from 2 databases [duplicate]

I have a SQL-Server database that crashed while I was away on vacation. All info from 5/2/13 is missing from our current database because my replacement implemented a back-up of the database from ...
7
votes
3answers
2k views

SQL Server 2012 Simple Recovery Model with LOG_BACKUP log_reuse_wait_desc

While I'm doing my own investigation, does anyone know why a database in SIMPLE recovery model has a LOG_BACKUP for the log_reuse_wait_desc? SQL Server 2012 SP1. No replication, no mirroring, no log ...
0
votes
1answer
87 views

How to use database users as a foreign key field in any table

I want to create a table where I can have a column username which will be the foreign key and it will only contain usernames of existing users on that database. For example, if I want to insert 'John' ...
0
votes
2answers
645 views

How find all the data loaded on previous day?

Issue: Data Loading into development environment from production database My production database is 40gb but I do not want all of those 40gb of data into my dev env and so my question is How can I ...
3
votes
2answers
2k views

Execute a T-SQL job with a different connection string

Is it possible to execute a stored procedure from a SQL agent job while specifying a custom Application Name, similar to specifying the Application Name in a connection string? The reason I want to ...
0
votes
0answers
657 views

MySQL is running but not working [closed]

In an attempt to tune MySQL to make it work with a recent installation of Drupal I had to modify the MySQL settings on my server. After modifying the configuration file for MySQL (/etc/my.cnf) MySQL ...
0
votes
2answers
376 views

Change SQL Server settings without restarting services

I can change SQL Server settings using Management Studio or programmatically as described e.g. here. I would like to make this changes WITHOUT the need to restart SQL Server services. Is there any ...
2
votes
1answer
641 views

Repair with 1 thread

Why would MySQL be using Repair with 1 thread to rebuild the indexes on a table (1 primary key, 2 billion rows) when I have myisam_repair_threads set to 4?
4
votes
1answer
114 views

Scheduled stored procedure on all databases in my server

On SQL Server 2012 (not express edition) I'd like to schedule the execution of a stored procedure every hour. On the same server I have lot of databases with the same structure, and I'm constantly ...
3
votes
1answer
364 views

Create File Stream Enabled Database in Network File (NAS Server)

I want to create a filestream enabled SqlServer database using NAS server as the storage. I already passed the creation of DB step. Look at my previous question Creating SQL Server database with data ...
1
vote
0answers
36 views

A separate table or ENUM? [duplicate]

There is a table person (which has among autoincremented primary key field id such fields as firtsname and lastname). There is a table employee whose primary (but not autoincremented) personid is a ...
4
votes
1answer
142 views

How can I enforce data integrity in this model with a M:2 relationship?

This model describes a part of my database (somewhat simplified): A "Tumor model" describes an experiment a researcher does on animals. The "Animal line" is a breed of lab animals, e.g. a Black 6 ...
2
votes
1answer
3k views

Dealing with empty strings while loading a table from a CSV

I am trying to load a CSV file into a table. The CSV file contains some empty strings for example: 1,2,,4 I want to load the empty field as null. One way I know is to use \N i.e: 1,2,\N,4 but it ...
0
votes
1answer
212 views

distribution.dbo.MSdistribution_history comments explanation

The comment column of distributor.dbo.MSdistribution_history contains comments such as <stats state="2" fetch="11554" wait="214007" cmds="17898546" callstogetreplcmds="106880"> ...
4
votes
1answer
125 views

One database or multiple referencing one?

Database design: one database or multiple databases, which is best? We have a database which has about a 100 or so tables, accessed by about five different applications. Five different applications ...
1
vote
5answers
573 views

Document database structure for auditors

I am DBA for a Microsoft SQL Server 2008r2. Due to an audition, I need to provide data structure of my database, to people without an explicit IT background. I guess they would like the traditional ...
0
votes
1answer
41 views

Mysql reliable with 1000 new entries / minute?

I have been developing an application that in the WORST case writes 1000 entries each minute into a database for over a year... I wanted to use Mysql as DB, but I have read that with high ...
3
votes
0answers
179 views

What happen when Postgresql tablespace is null?

I'm facing a DWH on postgresql with no DBA (I'm not one) so I turn to you with hope to figure this issue/s. Long story short, when I check the disk usage per tablespace, I get different distribution ...
6
votes
1answer
396 views

BM25 (full-text search) implementation in SQL Server

I've hit a stump, while trying to implement the BM25 algorithm in SQL Server 2008 R2. I know that SQL Server includes the Full-Text Search option, which already implements a variant of BM25, but I ...
-4
votes
1answer
550 views

Use select query in stored procedure

I have some questions about stored procedures. Using select query inside the stored procedure is efficent or using select query in front end. Which is take less time and give the result is fast or if ...
0
votes
1answer
2k views

Large INSERTs performance optimization

I have 15 Amazon AWS EC2 t1.micro instances which simultaneously populate Amazon RDS MySQL d2.m2.xlarge database with data using large INSERTs (40000 rows in query). The queries are send ...
1
vote
2answers
6k views

Remove collation from all database columns

I have a SQL Server database where the collation is set on it. However I am running into problems as the collation on some columns in the database varies from the database collation. I would like to ...
2
votes
2answers
701 views

How to perform ETL from RDBMS to Neo4j

I have a mature 50+ tables web application based on mySQL. In order to do some advanced data mining I want to use Neo4j and the goodnes of cypher. However I'm having a hard time migrating my data from ...
0
votes
1answer
267 views

PostgreSQL created a PostgreSQL user on mac. Is this necessary?

I just installed PostgreSQL on a Mac (Mountain Lion) today. The installer created a mac user PostgreSQL on my machine. After installation, the user still exists. My question is that why postgreSQL ...
2
votes
1answer
2k views

Ubnutu/MySQL - Error “Unable to locate package innotop”

I am using Ubuntu 12.04.2 LTS, with MySQL 5.5.29. Im trying to install innotop for database monitoring, but getting an error "Unable to locate package innotop" root@server1:~# apt-get install ...
19
votes
1answer
8k views

How can I benchmark a PostgreSQL query?

I want to benchmark a query containing an user-defined function I have written for PostgreSQL. Are there any standard ways to run such a benchmark? I know that timing can be turned on with \timing ...
2
votes
1answer
532 views

Multi-variance products

My current system houses different variants of Products in different tables; Productgroups Productcolors Productsizes Productmodels Products can reside under 1 Productgroup and can have ...
2
votes
1answer
1k views

How to monitor or do vacuum without stop all?

I have postgres9.1 I try to run full vacuum on a specific table , but it run for more than 5 hours. I stop all process against this table and i cannot have the process down any longer. Is there a ...
6
votes
1answer
764 views

How to shred .docx XML?

I am trying to import a xml (actually a docx file) to a sql server 2008 database. I am almost a novice in XML programming. I googled a lot but almost all the examples there are with simple xml file. ...
2
votes
1answer
1k views

Why is MySQL order by performance poor within a single partition of a partitioned table?

I have to store some sequence numbered data in MySQL. I have about 300,000 data items per day for about a 10 year span. Let's say the table structure is just sequence number (a big int) and data (a ...
1
vote
2answers
941 views

Is it okay to rename the MySQL data files (FRM) manually?

Like everyone, I realized the case sensitivity issues in MySQL of late. I wanted to convert my upper case table names to lower case using this solution but I forgot to do Step 1 and completed the ...
3
votes
2answers
7k views

Disk space full but logical space available in database

We have a fairly big MS SQL 2008R2 database that resides on a SSD drive. The drive itself only has ~110Gb of space, and the database files are the only files on the drive. The database is in "Simple" ...
3
votes
3answers
7k views

Simple model database transaction log full 'CHECKPOINT'

I have a SQL Server 2012 SP1 database which has a problem that the transaction log is full. It consists of a single data file and a single log file, both about 800MB. I had 5GB free disk space, and ...
1
vote
1answer
422 views

Drop database locked the server

I tried to drop one of the databases on the server. That locked the entire server up so I stopped the mysql process via the console. I restarted the server, started mysql and now it seems hanged on: ...
4
votes
3answers
13k views

mysql replication successful but slave not replicating

I have created a mysql master-slave configuration and things look fine . the " show master status;" on slave doesnt show any error . this is the output Slave_IO_State: Waiting for master to send ...
1
vote
1answer
223 views

Mistake during Oracle 11g PITR [closed]

I tried using set time until.. and mis-typed the date. Can anyone help me understand how to get my backups into a manageable state? After the accidental recover, most of my backupset disappeared. I ...
0
votes
2answers
1k views

how to find similar word with more similarities

how to Find words with length less than or equal... declare @inp nvarchar(max),@data nvarchar(max) set @inp='You can dance, you can jive, having .... jove... jve, ...' set @data = 'jeve' ...
4
votes
1answer
279 views

How to view the full, flattened query underlying a Postgresql view?

If I have a view on a view on a view (etc.), is there a way to show the full query that this expands/flattens to?
0
votes
1answer
375 views

File locations for Full Text Catalogs using SQL Server 2005 on VMware

I have an issue with one of our development SQL Server Servers. We have databases that use full text search catalogs. Just some background info, our servers are configured to use separate drives for ...
2
votes
1answer
500 views

How to ensure that date-range queries involving multiple time zones are sargable

I am building a web analytics application for search engine traffic only. You can see some screenshots here: http://myhappyanalytics.com/ It works similar to Google Analytics but it only saves and ...
0
votes
1answer
961 views

createdb command error : could not connect to database [closed]

I am using the following command for creating database in postgresql. createdb -D pg_default -E UTF8 -h localhost -p 5432 -U pramil -W pramil mydb but this command results prompt for password.When ...
1
vote
1answer
3k views

passing --single-transaction in mysqldump command line tool

I'm using MySQL GUI tool to backup my innodb database and I use the option '--single-transaction' to get a consistent copy as backup. I have however, noticed that if I backup using command line ...

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