1
vote
0answers
171 views

Does using noatime on modern Linux make sense?

Starting from version 2.6.30 (which was released 5 years ago), Linux has the option relatime enabled by default. It means updates of file access time are very infrequent and prudent. But I still see ...
2
votes
1answer
321 views

Schema for a Soccer club

I am designing a database for a Soccer club. A soccer club has several teams. Those teams have several players and a coach. Right now I have three tables: Club Team (foreign key to club) Player (...
3
votes
1answer
121 views

Error trying to open database

The database is for ms exchange. I am getting the following error. Any ideas guys?
1
vote
1answer
1k views

mysql inner join if value = true ( share system ) [closed]

users | id | name | |------|-------| | 1 | John | | 2 | Clark | groups | id | group_name| |------|-----------| | 1 | groupName | posts authorType* 1- user 2- group | id | ...
0
votes
0answers
298 views

Huge load on CPU because of mysql process [closed]

I am getting a huge load on my linux servers because of this query. CPU is on 500% load & this query is causing load. /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/...
0
votes
0answers
244 views

Attendance Database using sql in MS Access

I'm currently working with a simple database for the attendance of the professor in our college. I'm using MS Access 2010 with a Main table that includes the Attendance log of all the professor with ...
0
votes
1answer
388 views

Improve Insert performance for 200 Million rows

How can the following insert statement be improved - which varies from 20mins on certain days to 70-140mins on most other days. SELECT DISTINCT od.SourceID, od.OrderID, od.OrderLineNo, ...
1
vote
1answer
260 views

Why there is a start (*) after Nodegroup:0 in MySQL cluster? What does it means?

I am new to MySQL and MySQL cluster setup. However going through several blogs and Web links I've finally able to manage the cluster up and running. I have 1 management, 1 SQL and 3 data nodes (...
1
vote
1answer
2k views

“Table or view does not exist” on synonym

I have a database and a USER administrating it. Then I have an additional USER_APP to whom I granted CRUD access to all tables in my oracle data modeler (and then applied these via generated script ) ...
0
votes
1answer
117 views

Create Table with Int-attribute which can only use values between 6 and 36

Hello I'm learning for my databases examination and in one exercise they asking for creating a table with a attribute which can only use values between 6 and 36. How do I solve it? We used in the ...
6
votes
3answers
4k views

db_owner unable to drop database - Error 615, SQL Server

I have a SQL Server 2012 database running on amazon EC2. I've created a user to be able to create, edit and drop databases. I gave the new user with dbcreator server role. My user can connect ...
0
votes
0answers
617 views

Yet another slow query Postgresql 9.3

I'd like to get a count(*) from a relatively small joined table (returned result is about ~30000 rows). I use Postgresql 9.3 so simply getting select count(*) from tasks_task; uses index-only scan, ...
1
vote
1answer
3k views

Cassandra: Request did not complete within rpc_timeout

i was working with Cassandra 1.2.4 probably, after restoring some key-space when i tried to query in a key-space it gave me Request did not complete within rpc_timeout so i checked system.log & ...
0
votes
0answers
45 views

How Can I Convert SQL Server 2012 Version 11.0.3000.0 to SQL Server 2012 Version 11.1.3000.0? [duplicate]

I have SQL Server 2012 with version 11.0.3000.0 . I need upgrade my version to SQL Server 2012 SP1 because I need install Cumulation 4 in Sql Server 2012 Cumulative Update 4 for use PowerPivot in ...
1
vote
2answers
13k views

How Can I Convert SQL Server 2012 Version 11.0.3000.0 to SQL Server 2012 Version 11.1.3000.0?

I have SQL Server 2012 with version 11.0.3000.0 . I need upgrade my version to SQL Server 2012 SP1 because I need install Cumulation 4 in Sql Server 2012 Cumulative Update 4 for use PowerPivot in ...
4
votes
4answers
2k views

innodb DEPENDENT SUBQUERY very slow

Here is some innodb table. It insert,update,query very frequently. tn is product id col is product sub id tindex is product description.(store by each word) date is product add date stored by ...
0
votes
3answers
157 views

How to query for 'First showed up as'

Given the following table: Date Trd (INT(10)) Code (VARCHAR(10)) T-Date 1-Jan-14 1 B 1-Nov-13 1-Jan-14 2 B 3-Oct-13 1-...
4
votes
1answer
164 views

Query the Differential Changed Maps in SQL Server

Differential backups use the Differential Changed Map pages to determine what pages to backup. I'd like to investigate a backup strategy involving differential backups. For that purpose I'd like to ...
2
votes
1answer
492 views

How to generate time in milliseconds in PostgreSQL stored procedure?

I have been reading the Postgres documentation about timestamps, but I am still a little bit confused. I need to store moments in times, measured in milliseconds, between the current time and ...
1
vote
1answer
214 views

Join Query effects natural ordering [closed]

If we have 2 tables **user** +----+------+------+-----------+ | id | user | pass | gender_id | +----+------+------+-----------+ | 1 | lisa | good | 11 | | 2 | jack | pass | 10 | | 3 |...
6
votes
1answer
2k views

How is SQL Server returning both a new value and old value during an UPDATE?

We've had issues, during high concurrency, of queries returning non-sensical results - results the violate the logic of the queries being issued. It took a while to reproduce the issue. I've managed ...
1
vote
2answers
335 views

security tools for mysql [closed]

We are using MySQL Community version on Windows and are trying to secure it as best we can. Assuming that changing the version (for example purchasing the Enterprise edition) is not possible in our ...
3
votes
4answers
6k views

How to handle table design with variable columns

I have a table design scenario and as a non-DBA type, would like opinions on which is more scaleable. Say you are asked to record information on houses for a metro area, starting with a small ...
4
votes
1answer
5k views

“No row was updated error” in SQL 2012 - worked fine in SQL 2005 and 2008 [closed]

I have a database in SQL Server 2005. We are currently looking at upgrading to SQL Server 2012. I installed SQL Server 2012 in a test environment (Windows Server 2012 virtual machine). Backed up ...
1
vote
1answer
98 views

Compare the database compatibility_level to the server version?

I have a mixed environment of servers from 2000 to 2012, and I'd like to find any databases that have a compatibility level set less than the version of the server it is running on. Ideally, I'd like ...
1
vote
0answers
723 views

Can not ping Always On listener from outside primary node

I just setup SQL Server 2012 (on Windows Server 2012) Always On feature and have a problem with connecting to SQL Server Listener from non-primary node (it works from primary node though). Here is ...
4
votes
2answers
698 views

Multicolumn statistics on large table yielding poor estimations

I have a rather large table (~200 million rows), and although the statistics are up to date using WITH FULLSCAN, is it possible that my histogram (limited to 200 steps) is simply too broad for the ...
2
votes
1answer
560 views

Reorganize Objects in OEM - Host Credentials do not have enough privileges

When I try to re-organize objects from OEM (11g) and enter my host credentials (not "oracle"), I get the message: "An error occurred verifying the host credentials. Make sure the credentials are ...
1
vote
0answers
265 views

MySQL database problems all of a sudden— users' programs can't connect, I saw error 2013, error 32

I am editing my problem, based on what I've researched and done: Hi This is mysql running on an osx server. We suddenly have an issue where only one of anything can seem to connect to mysql at ...
1
vote
2answers
206 views

sql custom calendar question

I need to create a custom report for my PMO where they want allocation to be calcualted by multiplying working days for each month * total hours For example January 2014 should have 21 working days (...
7
votes
4answers
1k views

Run Server Agent Job on Schedule only if CPU is idle

I have a job set up in SQL Server Agent to run an update query. I want this job to execute every night between midnight and 5am and I want it to repeat every 5 minutes during that time frame. But I ...
0
votes
1answer
2k views

How can I search a column in MySQL containing unix timestamps with a query referencing a different format?

I have a mysql table that contains something like: +-------------+-----------------+ | FOO1 | FOOTIME | +-------------+-----------------+ | blah | 1234567890000 | +-----------...
5
votes
1answer
371 views

Numeric data type with variable significant digits

I need to implement a data type which should preserve the last zeros in the decimal points in SQL Server 2008 R2. Example of the data are 1.002 1.210 0.00100 0.1401 My clients get lab measurements ...
0
votes
1answer
2k views

Excluding the standard MySQL databases from replication

I have a prod database, say appdb, and I only care about the data in that db. Is it safe to declare replicate-ignore-db for each of mysql,information_schema,performance_schema,test, as some tutorials ...
1
vote
1answer
1k views

Syntax error in load data infile

I don't know why I am getting a syntax error. I have checked my query carefully many times and read up on mysql reference for load data infile and everything seems fine. Here is my query: LOAD DATA ...
1
vote
1answer
50 views

What indexes would I create for a query like this?

Here's a query I've got: SELECT "balance_transactions"."fee" FROM "balance_transactions" JOIN charges ON balance_transactions.source = charges.balance_id WHERE "balance_transactions"."account_id" = ...
10
votes
4answers
3k views

eCommerce orders table. Save prices, or use an audit/history table?

Im designing my first eCommerce schema. I've been reading around the subject for a little while, and am a bit confused about the relationship between an order_line_item and a product A product can ...
1
vote
1answer
6k views

Cannot Start SQL Server Reporting Service [closed]

That's the first time I use SSRS so my apologies if I'm asking something stupid. I have a SQL Server 2008 R2 already installed with SSRS. When I try to start the SQL Server Reporting Service I ...
0
votes
1answer
117 views

An SQL Server 2008 R2 based program fails when updating stored procedures?

I'm trying to update MIP software and one of the "companies" fails while it is updating a stored procedure. Is there any place in SQL Server 2008 R2 / Windows where I could see an error message ...
0
votes
1answer
365 views

Using inner join on a specific record?

So we have 2 tables users: id | username | email 1 | testuser | test@test.com 2 | dirk | test2@test2.com data: id | data | username 1 | somedata | dirk 3 | somemoredata | ...
1
vote
1answer
585 views

Upgrading mysql myisam 5.1 to mysql 5.6: force innodb on restore?

I inherited a DB using myisam on mysql 5.1 because of the need for fulltext search. I now read that fulltext search is available on mysql 5.6 innodb. Doing this would solve a lot of problems, as long ...
1
vote
1answer
1k views

What does “WSREP Aborter Idle” mean in a MariaDB Galera cluster?

I've tried to Google WSREP Aborter Idle but there are literally 3 results. Does anyone know what this means? Should I be concerned that the these processes have been opened for so long or is this ...
0
votes
0answers
322 views

MySQL gets slow in Linux server

I'm using a jdbc connection to connect a vaadin application to a MySQL database. It works fine, but after a couple of uses it gets really slow, and even freezes the application to a point I have to ...
0
votes
1answer
67 views

Optimize query to minimize tmp copying time

I have this mega query : SELECT s.eleve_id, crs.id_cours as 'cours_id', mc.code as cours_code, s.employe_id, s.id_seance, '0' as theorique, s.statut, s.type_vehicule_id, s.type_conduite_id, s....
4
votes
1answer
154 views

In READ COMMITTED isolation, is it possible to read the old value after the update?

I'm trying to solve an issue with SQL Server 2008 R2 and am grasping at straws. Given that data is housed in leaf-nodes of the B-tree, and is also exists in indexes, that someone could read multiple ...
2
votes
2answers
7k views

Create database fails with Microsoft SQL Server Error 5133, Operating syste, error 5 (Access is denied) [closed]

I just installed SQL server 2012 on Windows 2012 today. After the install, I changed the database settings to create database files in f:\mssql instead of the default. i verified the confired and ...
1
vote
0answers
97 views

Mysql Replication Master/Slave and Master/Master

Looking for some insight and opinions from some DBAs, as I've been tasked to look into using Master/Master replication for a single table in a database. We currently run mysql replication using a ...
0
votes
1answer
93 views

database size limitations [closed]

I am accidental DBA. One of my clients has been trying to upload a data file and he's been encountering error message about database size limitation. He hasn't sent us the exact error information but ...
7
votes
3answers
29k views

How long will a temporary MEMORY table persist if I don't drop it (MySQL)

I'm using a recursive stored procedure in MySQL to generate a temporary table called id_list, but I must use the results of that procedure in a follow up select query, so I can't DROP the temporary ...
2
votes
2answers
88 views

Comparing Queries

In SQL Server, if you're comparing the statistics IO from two queries, how do you ensure that caching doesn't become a factor? For example (I'm making this up as I type, not a real example): SELECT ...

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