1
vote
1answer
167 views

Finding exact row in Clustered index leaf page

When traversing through Clustered index in Sql Server, the engine will start from Root page and traverse over non leaf nodes until it reaches leaf level page (data page). Every data page has row ...
7
votes
3answers
10k views

MySQL replication - slave is continuously lagging behind master

I am using MySQL-5.1.50 with a Master-slave replication setup. Most of the time the slave is lagging behind the master. When I run show processlist;, there is no query that's taking a long time. ...
2
votes
1answer
149 views

How to know what to investigate and how for a VERY slow stored procedure

I have inherited a large and slow stored procedure and it's giving me a nightmare: I'm not a DBA, although I have some knowledge, but I don't know where to start to identify this bottleneck. I have ...
1
vote
2answers
2k views

SQL Server 2012 : how to add missing collation

When we run: ALTER DATABASE abc COLLATE Latin1_General_CP1_CI_AS ; GO we receive: Msg 448, Level 16, State 3, Line 1 Invalid collation 'Latin1_General_CP1_CI_AS'. How can we add the missing ...
1
vote
1answer
240 views

INDEX Creation Advice Oracle

I have a table that has time data of 2 billion records obtained from the clients. The data has two main columns, date and entity_id. The attributes date, and entity_id would make a unique pair. ...
2
votes
1answer
2k views

Error “cannot connect to server” installing MongoDB on Ubuntu

I'm trying to install MongoDB on Ubuntu 10.04. I followed these installation instructions. I got the following error: Error: couldn't connect to server 127.0.0.1:27017 src/mongo/shell/mongo.js:91 ...
4
votes
1answer
11k views

MySQL: Optimize UNION with “ORDER BY” in inner queries

I just set up a logging system which consists of multiple tables with the same layout. There is one table for each data source. For the log viewer, I want to UNION all the log tables, filter them ...
3
votes
1answer
1k views

PostgreSQL psql - not working but no errors [closed]

I'm a complete noob to PostgreSQL, so I'm probably missing something completely obvious. Connected to my local db via psql on terminal. Any command I run to make db changes, or even a simple select ...
2
votes
2answers
4k views

Move postgresql database from one server to another

I have created a (spatial) database at my home which is several gigabytes and I want to move the whole database as it is from one computer my works computer. Nothing fansy, I will create a new ...
2
votes
2answers
3k views

MySQL / InnoDB: Does daily optimization improve performance?

Would performing daily optimizations of tables increase performance for MySQL and InnoDB? I have never did this before, but I have seen this module for Drupal http://drupal.org/project/db_maintenance, ...
4
votes
2answers
1k views

Restore all applicable files in a backup device in T-SQL

I'm using SQL Server (2008 R2 in this case) and I am backing up my databases into backup devices (one per database). Every Sunday the device is overwritten with a new full backup, every night a ...
2
votes
0answers
2k views

Schema for an RBAC (Role-based Access Control System)

I want to implement an RBAC, Flat based. I've decided to base my system on the NIST standardization model. Although all fine and well, I have an inclusion to that design. Instead of a hierarchy ...
0
votes
0answers
787 views

Unable to view “Maintenance Plan” folder under Maintenance in SQL Server 2008 R2 Standard Edition

SQL Server version is as follows : Microsoft SQL Server 2008 R2 (RTM) - 10.50.1600.1 (Intel X86) Copyright (c) Microsoft Corporation Standard Edition on Windows NT 5.2 (Build 3790: Service ...
0
votes
1answer
1k views

Is it possible to use ExpressMaint with SQL Server 2012 (Express)?

When I try running ExpressMaint on a server with SQL Server 2012 installed, it fails with an error saying it cannot find the Microsoft.SqlServer.Smo libraries (SQL Management Objects). From what I've ...
2
votes
1answer
2k views

SQL Query - Set Date Variable by Table/Column Reference

How do I set the @DATE variable by using a table/column reference? Right now I've set it manually as you can see below with the opening: SET @DATE = '2012-03-31 01:00:00'; The table from which I ...
10
votes
4answers
9k views

Is there a tool to check if my database is normalized to the third normal form?

I learned about normalization recently, and understand how important it is when implementing a new schema. How can I check if my database is 2NF or 3NF compliant ? Manual review is a sure option, ...
1
vote
1answer
2k views

Planning simple CMS: How much relation?

I'm currently in the process of designing the database for a rather minimalistic Content Management System I'm working on alone. It should allow scalability while remaining speed, especially on boxes ...
-1
votes
2answers
238 views

Information sources for multiple hierachy trees in a single table

I need some quality sources - books, websites etc. - to educate myself about putting multiple hierarchy trees in a single table using SQL. I'm looking for some good theoretical and practical ...
6
votes
3answers
13k views

PostgreSQL: changing password for a user is not working

I installed PostgreSQL on EC2 machine and now I want to change the password of user postgres I do $ sudo -u postgres psql psql (9.1.5) Type "help" for help. postgres=# ALTER USER postgres WITH ...
1
vote
1answer
316 views

One address table for many types of addresses

I have an application where I have to store adresses of multiple types of location. For example, my app requires addresses of people, hotels and event venues. Should I create separate tables for ...
7
votes
3answers
7k views

Restrict update on certain columns. Only allow stored procedure to update those columns

I have sensitive price columns that I would like to have updated only through a stored procedure. I would like all code or manual attempts to alter values in these price columns to fail if it is not ...
-3
votes
1answer
428 views

Import an Oracle dump file using a second server

I want to import a dump file into an Oracle server, SRV1. Due to space constraints on SRV1, I cannot copy the dump to the server and then import it. I copied the dump to another Oracle server, SRV2 ...
2
votes
1answer
56 views

SQL Server services could not be started as 2 instances sharing same 'model' file

Please advise me on this issue: I have one default instance in SQL Server 2005 (sp 3 x64 bits) called instanceA. Then I installed another 2 instances called instanceB and C. After that I restore ...
1
vote
1answer
76 views

Disabling protocols using SQL Server Configuration Manager or ENDPOINTs

Besides SQL Server Configuration Manager, it's possible to disable access to specific SQL Server protocols by disabling the default ENDPOINTs, but what's the difference between the two options? Are ...
0
votes
1answer
9k views

Moving a 10g database to 11g with rman backup

Following Doc ID 369644.1, I'm trying to restore a 10g database into a 11g database ( version 11.2.0.1.0), which is in other server. What I did on 11g server: - Generate full rman backup of 10g ...
7
votes
2answers
376 views

Why does this cursor produce results in the incorrect order?

I am writing some dynamic SQL to identify and, perhaps if I'm feeling crazy enough, automatically convert my NONCLUSTERED indexes into CLUSTERED indexes. The line ORDER BY 1,2,3 DESC; in the SQL ...
3
votes
3answers
7k views

Alternative query to this (avoid DISTINCT)

Note: I work with MSSQL 2008, but I guess it's valid for many others DB engines I have this table "Users": UserID User CountryID 1 user 1 1 2 user 2 2 3 user 3 3 4 user ...
1
vote
1answer
2k views

Production SQL Server High CPU for a Single Query

I have a single query which is consuming a larger amount of CPU than I would expect in SQL 2008. I am not able to determine why the CPU is spiking for this single query. I can trigger an ...
1
vote
0answers
589 views

Dropping One Computed Column Causes All Computed Columns To No Longer Replicate

We recently dropped a computed column from a table that was participating in merge replication. After issuing the statement the other two computed columns remained in the table but stopped ...
1
vote
2answers
101 views

Consolidating data changes in SQL Server by team

What is a good way to manage developers' data changes? I am using RedGate SQL Source Control to monitor changes to tables and stored procecures, so that when we do a production build, I can include ...
2
votes
1answer
67 views

SQL Server single query takes longer by end of week

SQL Server 2008 R2. We are reporting off a DB-Amp backup of our SalesForce instance. I have a SQL query that takes about 8 seconds to run on Monday. By Friday the duration is 31 seconds and my app ...
2
votes
2answers
295 views

When restoring a SQL Server DB from dump files on a remote NAS share, copy before restore or restore directly?

My team is considering backing up all DBs to an Isilon NAS and we're conducting time trials to see if the restore time from the NAS is quicker than performing a copy to local storage before restoring. ...
5
votes
2answers
1k views

Partitioning a table vs moving entries to another table

I don't understand how partitioning helps me more or less than using a separate table to store older records. I need to maintain a list of stock entries along with historical records about the stock. ...
2
votes
2answers
537 views

What real-world problems have you solved with Extended Events? [closed]

I have a confession to make: I don't use extended events nearly as much as I've been led to believe I should. Any time I see a blog post on them or read about them in documentation, I say "that's ...
3
votes
1answer
535 views

SQL Agent job does not show up in the jobs folder in SSMS although they are in sysjobs table

I tried to copy some SQL Agent Jobs from server1 to server2 by selecting rows from server1.msdb.dbo.sysjobs and inserting to server2.msdb.dbo.sysjobs. I did the same with sysjobsteps. This seemed to ...
3
votes
1answer
226 views

Economic Database Architecture Possibilities w/ Data of Varying Length

I'm in the process of designing a MySQL database (InnoDB) that holds a large amount of economic data which our application scores. The size of the economic data varies a great deal: some measures, ...
3
votes
1answer
122 views

Slow MySQL query, not sure why

I'm working with an intranet application for property tax collection, and I've hit a snag. The following view runs much slower than I'd expect: create or replace view propertytaxessub0 as select ...
2
votes
2answers
302 views

Minimum/Maximum Server Memory in SQL Server 2005 with /3GB and /Userva switches

I have a 32-Bit Windows 2003 machine with 3.75GB RAM running one SQL Server 2005 instance. I am trying to optimize memory. If I use the switches in boot.ini like below, /3GB /Userva=2490 should I ...
2
votes
4answers
1k views

How to find out what caused a schema change?

I am investigating some performance issues on my SQL Server 2008 R2 server. Some queries are being recompiled due to a "schema change". I am pretty sure no one is changing the schema. All databases on ...
2
votes
1answer
160 views

Is there a name for a query that returns results which have sub headings?

I inhered a set of queries / macros from the previous employee in my position and one of the other people here showed me a query result (output from when the query worked correctly) which had ...
3
votes
2answers
936 views

postgreSQL update set only where cast is possible and ignore error?

I have 2 columns in a PostgreSQL table. The mac_address_temp column is for migration from character type to MAC-address type: mac_address | macaddr | mac_address_temp | character ...
2
votes
0answers
830 views

SQL fulltext accent insensitive [closed]

I am using SQL Server fulltext containstable and the column which is indexed has collation Czech_CS_AS, so why when I have word "byt" it returns records with word "být" too. I thought that the ...
1
vote
2answers
2k views

Mysql giving only 25 inserts per second

I'm using ubuntu 12.04 LTS Processor : Pentium(R) Dual-Core CPU E5200 @ 2.50GHz × 2 OS Type : 64-bit Memory : 3.9 GiB Disk : 101.1 GB I installed mysql and wanted to test insert performance. Here is ...
2
votes
2answers
170 views

Why isn't the transaction log getting truncated when taking a full backup?

In full recovery model, if we take a full backup, the log file is not truncated. It is done when we take a transaction log backup. Any particular reason of why it is done this way?
1
vote
2answers
364 views

mysqlslap number in sql statement to change with iteration

I am trying to figure out how to increment a number in a mysqlslap query with every iteratiom. Let me explain what I exactly mean: I got a query: SELECT age FROM member WHERE id = [some number] ...
1
vote
0answers
168 views

How can I force myisamchk to modify the original data file in case of duplicate keys?

In the documentation for myisamchk, it says: --quick, -q Achieve a faster repair by modifying only the index file, not the data file. You can specify this option twice to force myisamchk to ...
2
votes
2answers
183 views

Software for backing up SQL Server databases

Since using the new version of Symantec, I've experienced lots of problems doing incremental backups of clients' SQL databases. Is Windows Server backup a good alternative to Symantec Backup Exec ...
0
votes
1answer
766 views

MySQL slow sending data

I have a large table that frequently sends 3,000 rows of data to a client. The longest wait state is Sending data. I would like to minimize this if possible! Is there a foolproof way of doing so? ...
1
vote
1answer
945 views

MySQL Master-Slave Replication Cross Database

I am setting up Replication for cross Database as i have set 2 variables in Slave' s my.cnf as replicate-do-db=database_name and Replicate-wild-do-table=database_name.% ,But i am not able to get ...
1
vote
2answers
8k views

Sql Server agent can not start

I can not start Sql Server agent to create job. Can anyone help me? . I'm using Windows 7 Ultimate , Sql server 2008 Rc2 See this images:

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