The discipline of Operational and Architectural Management of Database Systems.

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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 ...
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1answer
16 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?
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40 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 ...
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2answers
44 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
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1answer
23 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 ...
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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.
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1answer
32 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 ...
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votes
1answer
28 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 ...
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1answer
17 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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2answers
32 views

Insufficient disk space in Filegroup

One of my jobs is failing and it shows below message. Error: Could not allocate a new page for database 'Reporting' because of insufficient disk space in Filegroup ‘PRIMARY’. Create the necessary ...
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1answer
40 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 ...
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64 views

Database as it is raw content

recently I asked my hosting company to give the backup of my database . I asked them to create a new database and import backup to that database. But they reply cannot dump database ...
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2answers
43 views

could not allocate a new page for database [closed]

Could not allocate a new page for database 'bteexamination' because of insufficient disk space in filegroup 'PRIMARY'. Create the necessary space by dropping objects in the filegroup, adding ...
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1answer
27 views

How can I set maxIdleTimeMS by command line or mongo-shell?

So, I have deployed my PHP application (using Laravel). However , I've noticed a high connection number in connection pool. I would like to know how could I to set the maxIdleTimeMS parameter through ...
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0answers
17 views

3023 : File serialization issue with transaction log backups

I am trying to take a transaction log backup on one of the AO replica servers. It throws an error saying that backup operations must be serialized. I googled this and found that only one backup should ...
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4answers
59 views

User privileges error on server maria db Create trigger Drop trigger

User privileges error on server maria db User : user1 DB : db1 Error 15:00:46 DROP TRIGGER IF EXISTS audit_trigger Error Code: 1419. You do not have the SUPER privilege and binary logging ...
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2answers
56 views

MySQL Backup Strategy

We are running the backup from the replication server and it is working good, since we are not facing any other issues, some information for better understanding our strategy: Backup Type: Full ...
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1answer
33 views

To use tpc-h benchmark its really necessary create primary and foreign keys?

Im doing some tests with tpc-h benchmark. And Im with a doubt, and I didnt find any answer. The tpch-h benchmark simulates a data warehouse environment. And the most important here are the queries ...
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2answers
51 views

Practical Aspects of Making Changes to Databases [closed]

I am setting up my first database and have gone through the standard process of studying the business logic, figuring out the entities, associated fields and dependencies. This is the ...
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1answer
44 views

MySQL ADD KEY meaning

This code below is creating a primary key on table User, but Im not understanding the second ADD KEY (C_NATIONKEY), do you know what is doing? Its something about foreign keys? ALTER TABLE USER ADD ...
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1answer
130 views

Huge database… queries too slow. How to improve performance? [closed]

I'm currently managing a MySQL database with 30 million rows(many more to come). The entire database is 280GB. The server has 4GB of RAM and 3.2Ghz 4 core processor. The largest column stores an array ...
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1answer
82 views

ORA-29913 and ORA-30653 error selecting an external table

I created an external table using a .tbl file and now Im trying to select all rows from that table, using: select * from users_load; But Im getting this error: ORA-29913: error in executing ...
0
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1answer
71 views

Starting MySQL… ERROR! The server quit without updating PID file (/var/lib/mysql/SI-CloudDB-003.pid)

I have changed mysql (5.6.29 linux centos 6.6 final) port from 3306 to 3310 and getting below error and its work fine with 3306. Starting MySQL... ERROR! The server quit without updating PID file ...
2
votes
1answer
210 views

VMWare VMotion causing performance to increase?

We've been experiencing strange issues for awhile now with our virtual environment running SQL Servers. We randomly get calls from users about very poor performance on the SQL boxes. Sure enough when ...
0
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1answer
101 views

Apply SP3 on SQL Server 2012 AlwaysOn AAGs

If Always-On is configured, while applying Service Pack, should I: Directly move SQL Server Instance (Secondary Replica) to make it passive and apply Service Pack Or First move Availability Group ...
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1answer
43 views

Always-On Configuration Clarifications

Do we have to Install stand-alone instances of SQL Server 2012 or Failover-Cluster SQL Server Instances while configuring Always-On? I am asking this question because I saw few configurations using ...
2
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1answer
48 views

Is it normal that our Wordpress' database crashed multiple times in this month alone?

I just started a new job at a small magazine as an IT guy. It all worked fine, but I'm worried about some issues with our VPS installation. Since I started working here (26 days ago), our Wordpress' ...
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1answer
106 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 ...
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votes
1answer
24 views

Enable service broker

I'm trying to enable service broker coz without enabling it alerts and database mail won't work.the database I'm using has mirroring and replication,I tried the option with rollback but didn't work ...
0
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1answer
41 views

Array as a column vs lookup table

Hi I have two tables that has one to many relationship. Table 1 Users: ------------- | id | name | ------------- | 01 | John | ------------- | 02 | Harry | ...
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1answer
32 views

Possible aproach for MySQL replication

This might be a duplicate questions asked before. But I need to understand a possible approach for my ENV running innodb engine. Is it possible to upgrade a Master MySQL Server to 5.5 to 5.6 and ...
2
votes
1answer
67 views

Moving to Production database for first time

We currently have a development database where we store lot of data (all of them are external data coming in .csv or excel files and stored via SSIS packages) and business users are directly connected ...
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0answers
28 views

Problem seeing Table Diagrams after Downloading SQL Server 2014. Default Status? [duplicate]

I recently downloaded and installed SQL Server 2014, and I am having trouble even viewing the table diagrams (i.e., the database ERD). Just curious: What kind of access level is necessary in order ...
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1answer
67 views

get query execution time in command prompt [duplicate]

I'm doing this query select * from rentals. This table has more than 10,000 rows and it takes more than 4 minutes to retrieve the results. But I get this time after I get the results: 10000 rows in ...
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0answers
17 views

MS Access - Extract Data from Proprietary mdb file

my friend has this "software" that manages financial records, with a lot of user data per record. This "software" is really an access file. To launch it, you use msaccess.exe program.mdb, and it ...
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0answers
28 views

Sync job issue, maybe network related?

I have a job that syncs rows in a table between a production server and four other servers. The problem is the job runs perfect on three servers, taking less than 2 seconds. On the fourth server, it ...
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0answers
31 views

Is it Possible to Rollback Table Deletion in Mysql [duplicate]

We Have Mistakenly Dropped a Table in my DB and am using MySql . Is it Possible to ROLL Back or any other options . Please Provide your Valuable Suggestions
1
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1answer
39 views

Failed to attach SQL Express DB, Could not continue scan with NOLOCK

We have a remote client that had to rebuild their server and has been having trouble with their SQL Express database since. I cannot remotely connect to this client unfortunately. I had them run "DBCC ...
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0answers
69 views

What is the motivation for modern database systems? [closed]

What is the motivation for modern database systems? I know what database systems is but what is modern database and what is the motivation. Does modern database systems mean how data is managed in ...
0
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1answer
38 views

Relationship between data independence and database schema

What is the relationship between data independence and database schema? I know both of them separately. But I don't know how to explain the relationship of these two.
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0answers
25 views

search pgadmin for column

I'm a front end dev and this is my first time doing serious database work. I have json sent to the client that looks like this: prop[0].event.history = 'foo'; //can also be 'bar' I wanted to ...
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0answers
6 views

What are the advantages of Packet Inspection and SHOW FULL PROCESSLIST over PERFORMANCE_SCHEMA?

We have several MySQL Servers (v 5.1) scattered across different geo locations. We are considering upgrading to the latest MySQL version as we heard a lot of good things about PERFORMANCE_SCHEMA ...
4
votes
1answer
55 views

SQL Server 2008 R2 services not coming online

I am working for a critical account and yesterday I got a weird issue after applying cumulative update package 14 on top of SQL Server 2008 R2 Standard edition. Before applying CU-14 package on the ...
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1answer
25 views

Unstructured to Structured Data

This is highly a research based question about converting the unstructured textual data to structured data. Are there any systems or tools perform automated process of converting the unstructured data ...
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0answers
70 views

Create File,secondary FileGroup then move a table and restore database with 'Primary'

I created a secondary FileGroup, added a File, moved a table there, and then restored the database with 'Primary'; however, the table name is still there and when I use a select statement I get an ...
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0answers
11 views

How can i delete or clear log files in sql? [duplicate]

I would like to clear the space occupied by log files how to do that in an sql server
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0answers
104 views

Is there a recommended for the database-to-DBA ratio? [closed]

We are now in a process of justifying the hiring of more staff for our DBA team. We have about 246 database instances. Not all of them are Oracle instances, some of them are PostgreSQL databases in ...
0
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1answer
26 views

How to get capacity specifications for a particular Oracle release?

How to get capacity specifications for new Oracle release(Oracle 11.2.0.4)? ie, information like How much schema we can create?, How much tables a schema can accommodate? How much rows total ...
0
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1answer
48 views

If my Data, Log and Tempdb drives are on the same LUN, are they using 1 physical drive?

My SQL Server Data, Log and TempDB resides on different logical drives. But when I check the drive properties under Hardware tab, their location are located on the same Port, Bus, Target ID and LUN. ...
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2answers
52 views

System Databases Integrity Check & Full Backup

I have an SQL Server 2008 and for maintenance solutions I use Ola Hallengren scripts. Recently, out of 15 databases I have on this server, I made two changes in three of them (not system databases, ...