0
votes
0answers
17 views

MySQL Cluster - Adding more storage space

I have spent a few days looking into different MySQL Cluster options, such as Percona and MariaDB Galera, however from what I understand neither of them can do what I would like it to do. What I am ...
0
votes
1answer
23 views

Multiple database directories with postgresql

I installed postgresql from source on Ubuntu 14.0.4. It is located in /usr/local/pgsql. At first, I created a data directory at /usr/local/pgsql/data and then ran initdb -D /usr/local/pgsql/data I ...
0
votes
1answer
20 views

JDBC local MSSQL Server connection string

I have installed open source database management tool "dbeaver" and want to use it instead of Sql Server Management Studio. But there is a problem. I searched from the internet but somehow I could not ...
3
votes
1answer
63 views

How to check foreign keys related to a table

How to see foreign keys related to a table in MySql? Background : I wanted to drop a table in MySql which has a foreign key constraint. When I do it I get this: Error Code: 1217. Cannot delete or ...
-1
votes
2answers
26 views

Double entry bookkeeping database design

I'm doing an accounting software and I need to enforce double entry bookkeeping system and I have the classical problem of 1 row per transaction versus 2 rows. Lets take an example and see how it ...
2
votes
1answer
38 views

How to archive a whole database?

I have a database that is not going to be used anymore but that needs to be kept around for a long time. I'd like to remove it from the production system. My goal is to save storage space when ...
1
vote
1answer
52 views

When Should You Shrink Your Database

I have read conflicting articles about shrinking a databases. Basically, our database grew 100% overnight from 150 gigs to 300 gigs b/c I believe it was with staging tables I put in. However, all the ...
0
votes
0answers
15 views

hashed password retrieval in mysql

here I am again with the next question! I hash a password as follows: mysalt=os.urandom(12).encode('hex') passhash =mysalt + pw hash =str( pbkdf2_sha256.encrypt(passhash)) How can I verify this ...
0
votes
0answers
18 views

SQL Server hangs during backup on EC2

Once and then our SQL Server will "hang" during its weekly full backup. When this happens, external connections start to timeout. The symptoms are: Connections timeout The sqlservr.exe process sits ...
0
votes
0answers
12 views

What could cause 300+ connections from a simple query in MySQL?

I am retrieving results from a table in MySQL 5.5. When I run even a basic query on this table hundreds of connections are shown in the Server Status screen in MySQL Workbench. Even for a simple query ...
1
vote
0answers
23 views

Uninstalling MS sql server 2012 issues

I'm trying to uninstall ms sql server 2012. But when I click Microsoft SQL Server 2012(64 bit) and choose remove option it shows like this. Then how can I remove the MS SQL Server 2012? Please help. ...
0
votes
0answers
7 views

Post categories model for a user submission wedbsite

I'm building an user submission site where users can make posts to content_types: Blog, Movies, Photos, Forums. Since these content types only have slight variances I would like to keep them in one ...
1
vote
1answer
28 views

Oracle: Recover source code/table structures from “utterly wiped out” development database

Given an Oracle 11.1 database used for development, running in NOARCHIVELOG mode, where all datafiles (including undo) have been wiped out; and only SYSTEM and SYSAUX datafiles and control file remain ...
1
vote
1answer
111 views

Dealing with Difficult DBAs [on hold]

At one point, test database deployments within my department were handled directly by the database developers. The typical process was that the developer would unit test their changes in the ...
0
votes
0answers
17 views

Filesort when using view

I am sorry for asking, but I can't figure what i am doing wrong and filesort appears in my explain. The id column that I use for sorting in the following examples is a primary key... If I create ...
3
votes
1answer
56 views

How is encoding done in SQL database tables for pattern matching?

Are strings in table columns represented as bit patterns or Unicode? Does the database engine bring them into memory in a different representation character set from the disk-persisted ...
2
votes
1answer
25 views

Deferrable Foreign Key Constraints

What are the consequences of making a foreign key constraint DEFERRABLE INITIALLY IMMEDIATE instead of NONDEFERRABLE? This answer on StackOverflow mentions the performance impact that comes with no ...
0
votes
0answers
13 views

Working on a blog creation website; should I be creating a new table for each blog, or keep everything on the same table?

So I'm working on this blog creation website as a side project. I don't actually expect it to become anything, but I want to make it as efficient as possible, even if just for practice. The idea is ...
0
votes
1answer
34 views

How to execute two transactions concurrently in PostgreSQL?

I want to execute two transactions concurrently in pgAdmin: --The first transaction should modify the age of Paul BEGIN; DECLARE newage INTEGER; --the original age of Paul is 32 newage := Select age ...
-1
votes
1answer
47 views

Grouping based on the status, then count its product and the total based on its category ID

I have a table with product ID, category ID and status of the product. +---------+-------------+-------------+ | id | cat_id | status | +---------+-------------+-------------+ | 1 ...
1
vote
1answer
22 views

Creating a global temp table in a SQL Agent job

I want to create a global temp table in a SQL Server Agent Job. Here is the code: CREATE TABLE ##TestEmployee(Id int, EmployeeName nvarchar(50)) When I execute in SSMS, all is well. I then put ...
0
votes
1answer
11 views

PostgreSQL ODBC and Microsoft Access date/time in aggregate functions

I am trying to replace our MS Access 2003 databases with PostgreSQL 9.3. The first step is to use our MS Access front end to the upsized databases in PostgreSQL. Everything seems to work very well ...
0
votes
0answers
25 views

Performance impact of IF @@TRANCOUNT > 0 COMMIT TRAN

I'm dealing with some performance issues on SQL Server 2012. The client application indicates that the SQL time to load a page is over 2.5 seconds with a total loading time of more than 3 seconds. For ...
-1
votes
0answers
21 views

TCP Provider: The semaphore timeout period has expired

In Sql Server2008 R2 and Windows Server 2008R2, when I start Replication I have this error: TCP Provider: The semaphore timeout period has expired Please help me to solve it... Thanks!
0
votes
0answers
19 views

For any SQL query, do there exists a unique translation into relation algebra

I have been studying databases and I understand that for each query that a database user type, the DBMS translate them into relational algebra operations before applying them to the database. My worry ...
0
votes
2answers
21 views

understanding mysqldump auto-backup performance issues and inner functionality

Is there a performance issue, if I run a cronjob in background with mysqldump --single-transaction with a 60 seconds interval? Will my original database keep functioning without an issue while the ...
1
vote
0answers
35 views

SQL Server 2008R2 to SQL Server 2012 Install

I'm trying to upgrade one of my SQL servers from 2008R2 to 2012 and I'm getting an error popup within a couple of seconds from starting the setup The Error is TITLE: SQL Server Setup failure. ...
1
vote
0answers
24 views

Compatibility Level

I have a Database from SQL Server 2008 R2 which I recently updated to SQL Server 2012, since I migrated the SQL Database from 2008R2 to 2012, our application connected to it became slower. What I'm ...
0
votes
3answers
22 views

SSIS or msSQL way of sectioning a flat file

I have a few hundred thousand flat text files which contain a single column of values. The first 40 values are parameters followed by between 4000 - 8000 rows of sensor data. The files are imported ...
0
votes
0answers
15 views

Optimized ways for defragment mysql database table

We have a database in MySQL which has more than 500 GB of data, and currently in the process of purging data and count might go beyond 1 million. As we know that purging might lead to high ...
0
votes
0answers
14 views

SQL Server: Importing snapshot of tables from linked server

I need to import 2 tables from a linked SQL server. So far, the following code has been successful: SELECT * INTO MyTable1 FROM MyLinkedServer.MyDb.dbo.MyTable1; SELECT * INTO MyTable2 FROM ...
2
votes
1answer
40 views

Query to flatten schema

I have the following tables and columns: Users id | other-non-important-columns Containers id | Users_id | other-non-important-columns Content id | Container_id | other-non-important-columns ...
2
votes
1answer
44 views

Several Foreign Key and Cascade Delete SQL Server

In SQL Server 2014, I'm trying to add CASCADE DELETING (I want to set field to null actually, but is the same ) on 3 FK. If I add a Cascade Delete in one relationship, it works fine. If I add more ...
1
vote
1answer
37 views

Performing search on a column by query

Up until today I've used LIKE %term% to query for rows on particular column term. Then I've read about FULL TEXT index. And I think I misunderstood how Full text index works. I have an API that ...
0
votes
0answers
22 views

Is there some tricks to better index a URL column in postgres?

I'm working with a table that needs fast retrieve rows by its url column. But they all will be starting with http://www.: http://www.google.com http://www.amazon.com http://www.stackoverflow.com I ...
3
votes
2answers
72 views

Split database to fit on SSDs

I have a database that's about 3TB in size and want to upgrade to SSDs. The SSDs I found that are reasonably priced are only 512GB so I'll need to purchase multiple drives. What are some ways to ...
0
votes
1answer
37 views

LDF files vs. TRN files vs. Tempdb.MDF+LDF files.:

We have a dilemma… We have all of our MDF and LDF files in the same…\192.168.6.22\d$\Program Files\Microsoft SQL Server\DATA\Production...folder. We have all of our TRN and BAK files on ...
2
votes
2answers
43 views

Optimal engine for small lookup tables in MySQL

I have following question: I am designing web application with several dozens of small lookup tables: These tables usualy contain three columns (ID, Name, Description) and a couple of rows (mostly ...
8
votes
1answer
108 views

Trace Flag 4199 - Enable globally?

This may fall under the category of opinion, but I'm curious if people are using trace flag 4199 as a startup parameter for SQL Server. For those that have used it, under what circumstances did you ...
3
votes
2answers
42 views

Which Log should I start backups with?

We have log backups running every 15 minutes and nightly fulls/diffs (fulls are once a week per DB, but they are spread across the whole week for load balancing). Lets say for a particular DB I have a ...
0
votes
0answers
15 views

Data Sources are not visible through browser or through SSMS when connect to reporting server but are visible in SSMS

As above I have a reporting server and currently when I browse to bizvm01/reports Data Sources are not visible through the browser. Reports are visible and they work. When I connect to bizvm01 using ...
0
votes
0answers
24 views

Postgres 9.4 - How to really grant all privileges on a database to another user?

Just a heads up, I'm fairly new at this whole DBA thing. Okay, with that out of the way I've been struggling mightily lately with granting access to a database in postgres to a user. Let's call the ...
0
votes
0answers
19 views

MongoDB denying API access, while console shell works

I am a MongoDB newbie, with a MongoDB instance running on a Ubuntu machine. If I login onto the machine's console and run mongo -u username -p password databasename I have permissions for the ...
1
vote
0answers
21 views

Find all tables that are related to a view recursively sql server

I have a view-A that is comprised of other views (View-B View-C) and I would like to list all the tables that used by View-A (which would include the tables used in View-B and View-C). When I use ...
1
vote
1answer
44 views

How does RANK() work in this query? [on hold]

I want to delete duplicate rows from a table. I have searched for the query online, and found the following sample: DELETE FROM dbo.LeadsContacts WHERE Sr_No IN ( SELECT Sr_No FROM ( ...
0
votes
1answer
12 views

Where to look for Agent history in Replication?

In SQL server 2008R2 replication configuration, "agent history cleanup distribution" job by default runs every 10 minutes and deletes any historical data older the 48hrs. If I increase the retention ...
0
votes
1answer
16 views

Periodically update a table with new records from another server

I have databases on two different servers. I need to regularly retrieve new records from a table on server A, and process them in order to use them to update a table on server B (with a different ...
-1
votes
2answers
27 views

database Compatibility 90 to 100 changing causes any problem

We are planning to change Compatibility level of databases from 90 to 100. Would this cause any impact on application side? If yes then please guide me, what steps or measures we need to look upon ...
0
votes
1answer
17 views

Restart the active node services without failover [on hold]

On a 2 node cluster configuration, How to restart the SQL services on the Active node without failing over on to another node?
0
votes
0answers
14 views

Conditionaly query in postgresql function

I have a simple query below : CREATE OR REPLACE FUNCTION companies_all_teams( ...

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