The discipline of Operational and Architectural Management of Database Systems.

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Cannot Start MongoDB

I cannot start MongoDB on Debian(Jessie 8.4 Stable). I generated the keyfile and added the path to the key file to the configuration and uncommented the "auth=true" but when I try to start the service ...
0
votes
2answers
773 views

How to build a table for a private messaging system that supports replies?

I'm writing a private messaging web application in PHP, the application allows replies such that when you view a message, you also get to see to what was that a reply to, and to what was that a reply ...
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0answers
20 views

SQL Server Job does not execute when scheduled, but does execute manually, how do I get it to run as scheduled? [duplicate]

I am running SQL Server 2014 SP 1 CU 5. The job did work in the past. The schedule is enabled. The account it is running under is an ADS account which has sysadmin rights and has delete rights to the ...
1
vote
1answer
23 views

Easy way to have non-tech users modify database?

We're in the process of engineering a BI solution. One problem we have is that sadly a lot of HR information (start date, department, department change date, work hours, etc etc) -- seems to me ...
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2answers
37 views

Dedicated SQL instance vs multiple database same server instance

Looking for best practice advice for a sprawling network. I inherited a bunch of SQL servers. The practice has been to just stand up a new VM instance any time a database was needed or add a new SQL ...
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0answers
7 views

which database to use with FileNet [on hold]

hello to all database individuals. I would like to try file-net from IBM company. i am in database option choice!! I am wondering, which database is better for file-net SQL or oracle?! Please help;,
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0answers
28 views

what prerequisite are required to become a DBA?not overview but to the depth of course [duplicate]

what prerequisite are required to become a DBA?not overview but to the depth of course if any online link is there to learn or course to become DBA then let me know
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2answers
213 views

Replace a specific part of a string using MySql

I have many Strings in the database Like <iframe src="https://www.youtube.com/embed/-qTiYA1WiY8&index=8&list=PLPNcLSfYNC3Dw535smncyHRCBRmdf1Bti" frameborder="0" ...
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0answers
17 views

RMAN Duplicate internal operation [on hold]

How RMAN Duplicate works internally?Please explain in detail how RMAN picks the latest backup and duplicate works
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1answer
3k views

Not receiving archivelogs from production to remote side

I have a scenario in which we have Designed data guard. Where we have 2 standby sides. One standby is located locally and 2nd standby is located on remote side. The distance between local and remote ...
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1answer
466 views

RapidMiner Not Connecting To SQL Server Database Connection

I recently installed RapidMiner and tried connecting the application to my MS SQL database connection via the Manage Database Connections feature. I have followed video tutorials on integrating SQL ...
3
votes
3answers
33 views

Call to default values (MySQL) in a procedure

For the sake of an experiment, we're working with the following procedure (same DB, multiple tables): delimiter // CREATE PROCEDURE mysql.insertTables (_first_name varchar(30), _last_name ...
1
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1answer
31 views

Importing Oracle12c database

i am using Oracle 12c in debian Jessie i want to import an old database exported with expdp on oracle 12c when i try to launch the commande 'impdp' i got those errors : 'ORA-39002: invalid operation' ...
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1answer
207 views

Can we restore backup for standby from external hard drive with differnet drive labels

I am using windows server 2003 and Oracle database 10g R2 and i have taken the backup using RMAN of my primary database in Drive label E. The size of backup is 1.5TB. In my standby database i don't ...
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2answers
78 views

How can I remove 'Using temporary ' and speed up my query

Hi I was working for hours to speed up this query using indexes, but its useless.. im tyring to optimize by eliminating 'Using temporary' and using only indexes. I wonder if there is another ...
0
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0answers
14 views

For about ~50,000 - 100,000 records, how much RAM is required for analysing? [on hold]

I'm working on A Python Data Analysis Project. The Database would contain about ~50,000 to ~100,000 records. How much Ram would I need perform the processing in how much time? i'm working on 64 bit ...
2
votes
2answers
316 views

DB2 db2fm proccess

Server is been up for 365 days, however i got some weird repeated procceses. Are these normal? ps -fea | grep db2fm db2inst1 643284 229516 29 May 25 - 212564:06 ...
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0answers
30 views

Error ORA-12547: TNS:lost contact

I installed Oracle12c Database in my server i run SQLPLUS with the command 'sqlplus /nolog' and when i type 'conn sys /as sysdba' i got this error ORA-12547: TNS:lost contact Can you help me ...
3
votes
1answer
9k views

How to run DB Admin Tool (GUI) in IBM DB2 Express-C?

I had installed IBM DB2 Express-C in Windows but I can't find any shortcut to launch the Administration Tools (GUI). When installing, I had selected "Administration Tool" option (I had checked twice ...
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0answers
14 views

Diagnosing why postgresql query is going in a seemingly endless processing loop

I maintain a social forum built with Django and postgresql 9.3.10. There's a maintenance query I run via psql, to clean up my postgresql table. It goes like this: begin; DELETE FROM links_seen WHERE ...
3
votes
1answer
132 views

How to directly query other user tables

I am trying to learn Oracle database and I am having difficulties on importing a backup file with impdp command. I googled deeply but couldn't find answers to my problems. What have I done until now ...
2
votes
1answer
21 views

Count of range on datetime in MySql

I want to group table entries for each userId only if they are consecutive entries in the table. I have a table like this. id userId transactionTime 1 1 2016-04-13 22:15:44 2 1 ...
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1answer
14 views

SQL Server MIRRORING - FAIL ON SECONDARY

I have a problem in the SQL Server Mirroring. Current system: Server: S1 (Principal) & S2 (Secondary) Databases: D1 (2.5TB) & D2 (20GB) Situation 1: without witness 1. D1 & D2 were ...
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0answers
10 views

don't understand atquery command script [migrated]

I'm using a big-data database. in one of it's tutorial it has recommended me to use below bash scripts if order to running queries: #!/bin/sh # this will launch the real atquery program with the ...
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0answers
46 views

RDS MySQL memory usage question

I have an instance of RDS of MySQL 5.7.10 I am on a package: db.t2.micro which grants me 1vCPU and 1Gib of memory. I am using Monitoring window to monitor the CPU/Memory usage. I do not understand ...
3
votes
2answers
138 views

Best fill factor for GUID clustering key

We have a database that uses GUIDs for most of their columns in a data (non sequential). Does anyone have any best recommendations for fill factors on a GUID database in an hgih insert/update ...
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0answers
10 views

Remedying psycopg2:OperationalError in postgresql 9.3.10 database

I have a Django app + postgresql 9.3 DB, hosted on Ubuntu VM. Recently my VM ran out of disk space, resulting in no space left on device errors showing up in my logs. I cleared the space on the device ...
0
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1answer
37 views

I'm a beginner, studying Data modelling as part of my course. I'm having trouble understanding Normalisation. How can i improve?

It was difficult to frame the title given the word limit, so apologies for that. Currently I'm studying DBA and Data modelling as a part of my ICT Apprenticeship course in a Web Development team. I'm ...
4
votes
2answers
15k views

Table is marked as crashed and should be repaired

I have MySQL and Nagios installed Linux PC (Centos5.5) I have wrote some script to fetch the data from Nagios to Mysql DB (Exactly fetch data in Table) The data fetching working properly (confirmed ...
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1answer
370 views

The service name is invalid while starting EM on oracle 11g on windows

I am trying to start EM on oracle 11g on Windows. When I performed emctl start dbconsole It shows The service name is invalid more help is available on net helpmsg 2185 and when I wrote net ...
0
votes
1answer
62 views

Error launching sqlplus

I try to run sqlplus on my server with the command sqlplus /as sysdba and I got this error sqlplus: error while loading shared libraries: ...
0
votes
1answer
31 views

Table/database design question

Suppose you have these fields to keep track of in records: (first_name, last_name, state_id, stateid_status, day, month, year, id_status, id, criminal_status, charge, plea, sentence, create_time, ...
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2answers
130 views

Unable to start Oracle database

We have a oracle database, one data file(users table space) of the instance got corrupt and another data file(containing application data) was deleted due to some issue. The database is in ARCHIVELOG ...
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votes
1answer
23 views

Check is there is an Empty Column Value

Let's say we have a Table in MySQL Database called TAB1 that Contains two Columns col1 : col2 . the question is : is there a way to check is any of these Columns Contain a Null or Empty Value? for the ...
6
votes
1answer
1k views

What to do when handed a server the first time?

I'm a new SQL Server DBA in a new company. Just recently, they have handed me access to the server. There are about 50 OLTP databases with different sizes, some ranging 250MB and the biggest database ...
2
votes
1answer
2k views

How to create Postgres DB with case insensitive collation

I am using the postgres version 9.4.1 64-bit on windows 7 64-bit. I need to create DB with the setting "case sensitive = OFF" but couldn't make this work. I refereed already many question on SO and ...
0
votes
1answer
14 views

Install MongoDB on Debian

I tried to install MongoDB using this command: apt-get install mongodb=3.0.1 But the version 3.0.1 was not found. How can I install it?
0
votes
1answer
145 views

Time out while connecting to the database. Current time out value is 30 seconds

I am installing a repository creation utility on a windows 8 x64 bit system and getting the following error: Time out while connecting to the database. Current time out value is 30 seconds When ...
1
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1answer
213 views

MySQL partitioning table by date and hour

I have a table with a timestamp field. This table will have millions of rows every day so the idea is to create partitions by date and hour. Every day I will delete partitions older than 10 days and ...
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0answers
39 views

How can I partition records vertically across machines?

I recently asked two questions: (1) how to store and connect partial records in two or more machines, with the record halves correctly associated, and (2) how to determine the increase in time/space ...
2
votes
2answers
42 views

Is an Oracle 10g instance dependent on the windows account authentication?

I have created an Oracle 10g (10.2.0.4) instance on a Windows 2003 Server with a domain user xxx having domain administrator level privileges. Now I wish to change xxx's password. Will it impact the ...
0
votes
1answer
16 views

mySQL Event Help - Update colum value for each row every 15 minutes

Okay so if I have a login database: id | email | pass | attempts ---------------------------- 1 | "" | "" | 4 2 | "" | "" | 2 Attempts marks the number of attempts made at logging ...
-4
votes
1answer
27 views

SQL Server Table Creation Help [closed]

I'm a newbie, taking University course on DBA with Microsoft SQL Server and trying to write my first manual create table table but I keep getting errors in query or in using SQL Fiddle My attempt is ...
0
votes
1answer
28 views

Oracle 11G, Move indexes from one datafile to another

I have an Oracle 11G DB installed on Windows Server 2008 SP2 64bit OS. Below is some data files usage statistics: As you can see, there are two files: index01.dbf and index02.dbf belong to the same ...
-1
votes
2answers
42 views

Good learning source for learning normalization [closed]

Can anyone recommend a good learning source to learn about database normalization from scratch please? I referred to many youtube videos but they weren't fit to me.
6
votes
2answers
5k views

efficient way to poll database?

I have a Linux CentOS server hosting an Oracle 11.2 database, which communicates with an application server, which communicates with a client (a Flex application). I'll try to describe the pseudo-code ...
1
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1answer
96 views

compare file-based systems and a relational database

I don't know the exact difference of both can you please compare file-based systems and a relational database?
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1answer
82 views

MongoDB allocates chunks only to Primary when sharding is enabled

I'm setting up an instance of MongoDB with 3 shards. I've setup everything seemingly correctly by following the docs and comparing my config with that of a friend who has a similar setup but with a ...
3
votes
1answer
1k views

Standby controlfile error

I am doing dataguard. I have manually done a backup for the standby database. It was working fine. Problem arose when I used the standby controlfile. On the primary, I have created a standby ...
0
votes
1answer
30 views

Should my database be on the same server as my web server?

We are about to add user login and management to a high traffic website. I am wondering if I should put the postgres database on the same server or put it in a different node in the internal ...