2
votes
1answer
312 views

Slow enumeration of schemas and tables in a largish database

We have a Postgresql 8.4.8 database server on a Debian system with a database that has 500+ schemas with roughly 300+ tables each. The schemas and tables are created by scripts, we cannot influence ...
18
votes
1answer
27k views

Table-Valued Parameter as Output parameter for stored procedure

Is it possibile to Table-Valued parameter be used as output param for stored procedure ? Here is, what I want to do in code /*First I create MY type */ CREATE TYPE typ_test AS TABLE ( id int ...
1
vote
1answer
921 views

Create Index with a WHERE clause

I've read the documentation on the MSDN, but it doesn't answer what I'm after. If I create an index on specified columns using a WHERE clause for certain IDs, this will limit the index to those IDs ...
4
votes
1answer
2k views

WAL backups with pg_dump not possible?

I am hoping to move to WAL backup from pg_dump. But I am confused by this note in 4.3 documentation: Perform the backup, using any convenient file-system-backup tool such as tar or cpio. And ...
5
votes
5answers
6k views

User Windows login name has been changed in AD yet session in SQL 2008 Profiler shows the old Windows login name

Background: a user had her name changed in Active Directory from Domain\oldname to Domain\newname and successfully logged into the network with Domain\newname and yet Domain\oldname appears in ...
5
votes
2answers
1k views

Getting recovered db files to work on rebuilt server

I've had to rebuild my server and have tried to copy the database files from the old drive to /var/lib/mysql/. I have restarted apache and run 'show databases', this list all the databases. I have ...
-3
votes
5answers
19k views

Safely deleting a SQL Server log file (.LDF)

I can make sure my app is in a consistent state. I can rollback all the uncompleted transactions if any (just in case) it's ok I can DETACH the database What do I need the log file for after that? ...
1
vote
1answer
1k views

Using Apache/ mod_proxy_ajp/ APEX Listener together

Our application is developed with APEX, and it is accessed through APEX listener through HTTP on default port 8080. Now, we want to switch to Apache with mod_proxy_ajp and reconfigure APEX listener to ...
5
votes
1answer
2k views

How can dm_db_index_usage_stats show 0 for user_seeks and user scans but a large number for user_lookups?

I'm probably not understanding something but here is the question. I have done a query on dm_db_index_usage_stats. I've noticed that a couple of my indexes have large numbers (6.5 million and 20 ...
0
votes
3answers
292 views

Is it possible to check a date in SQL?

I'm trying to write a Microsoft SQL Server stored procedure which takes an account ID, and returns an authentication ticket and whether the ticket is expired. Something like this: SELECT ...
1
vote
1answer
133 views

Printing \G on shell using mysql client..?

It is really a a headache for me from some hours i am struggling on the problem.I have also asked it on stack-overflow but not got any answer yet so i am asking here.Sorry for Not a good question. I ...
2
votes
1answer
395 views

Mirroring multiple source databases to a single destination in SQL Server 2008

How can we maintain multiple source databases data in a single destination server database in SQL Server 2008? They all are at different networks, if that makes any difference.
10
votes
3answers
6k views

Database suggestion for a social network/ knowledge base community?

I am looking into various database types and DBMS's for a new project I am wanting to start in the summer. I have built systems in MySQL and postgreSQL , now I am wanting to expand my knowledge and ...
15
votes
4answers
7k views

Does running pg_dump on live db produce consistent backups?

I have a 3GB database that is constantly modified and I need to make backups without stopping the server (Postgres 8.3). My pg_dump runs for 5 minutes. What if the data is modified during the process?...
-2
votes
3answers
78 views

email a database made by My SQL [closed]

I want to email a MYSQL database I created with all tables and queries to other person to check do I use the Import and Export Wizard or there are other ways?
5
votes
2answers
2k views

How to design a schema to store search keywords

I am doing a database design that stores search keywords of a search form, used to generate the most popular search keyword reports by date, month and year. I have made a simple schema: CREATE TABLE ...
20
votes
5answers
10k views

Plural vs Singular Table Name

How should I name my Tables when creating a new database? Singular: Client or Plural: Clients?
0
votes
0answers
33 views

Fix missing performance counters [duplicate]

Possible Duplicate: How to revive SQL Server 2008R2 performance counters? On one machine, I have an instance of SQL Server 2008R2 Enterprise, Visual Studio 2010 and VS 11 Developer Preview. I ...
0
votes
1answer
131 views

Regular expression problem

SELECT FIRSTNAME,LASTNAME, EMAIL FROM CUSTOMERS WHERE REGEXP_LIKE(EMAIL,'[A-Z0-9._%-]{1,10}@[a-z0-9._%-]{1,5}\.[net|com]','i'); I know this is not practical or make a ton of sense, but its a ...
2
votes
1answer
555 views

How to prevent high memory, CPU and time consumption by MySQL restore?

I have a local test machine with 2 GB RAM and a dual core processor. I imported a dump on that using mysql -uuser -psecret < script.sql script.sql is a 700 MB file which contains a single ...
4
votes
2answers
2k views

How could one monitor MySQL replication?

I am not a DBA, but I am interested in knowing how replication monitoring is done on MySQL severs. In order to know if a slave is in sync with its master, one would typically check ...
2
votes
1answer
176 views

Profiler: Only want to see Provider Errors

I'm replaying a trace in Profiler, and I'd like to only see the Provider Errors. Granted, there are ~30,000 of them but I'm not concerned at the moment about row update conflicts, foreign key or ...
3
votes
2answers
654 views

Remove nulls from TSQL connection string

I have a bunch of queries, against a couple different databases, that I use to generate delimited reports. I'm trying to create some new reports against a MSSQL database and I'm having trouble ...
2
votes
1answer
1k views

export data from oracle 10g

I installed Oracle 11g on my computer. When I export data from Oracle 10g, I get the following error code. I have translated the error in parenthesis. EXP-00008: 遇到 ORACLE 错误 904 (encouter oracle ...
2
votes
1answer
2k views

PostgreSQL dump/restore from 8.4 to 8.1 in a shell script

I have to restore a DB table every day from a postgresql 8.4 to 8.1. For the backup, I use this code (windows server): D:\PostgreSQL\8.4\bin\pg_dump -U postgres -p 5433 -t my_table myDB > D:\...
4
votes
1answer
1k views

Migrating Sql Cluster Installation To New Drive

We are migrating from an old SAN to a new SAN and need to migrate our SQL Server instance to new LUNs. We are able to migrate the data without any problem, but the SQL Server instance itself is ...
2
votes
1answer
432 views

Table Statistics Affect Index Only Query?

We have a query that was getting poor performance. The root of the problem could be reproduced using a simple query accessing only one index to retrieve one column (the indexed column) from eight ...
20
votes
7answers
42k views

Get the rank of a user in a score table

I have a very simple MySQL table where I save highscores. It looks like that: Id Name Score So far so good. The question is: How do I get what's a users rank? For example, I have a users ...
-7
votes
1answer
582 views

Where will i download denali SSMS from? [closed]

I have read many blogs around praising new features in denali SSMS. I really wanna try but unable to find how to download only SSMS (denali).
29
votes
2answers
18k views

What is the difference between a connection and a session?

What is the difference between a connection and a session and how they are related?
3
votes
1answer
145 views

Table view created with triggers, someone please explain why?

I'm part of a project that inherited a piece of software that has a unique MS SQL database design that I'm trying to understand why they designed it the way they did. Basically for every table, for ...
5
votes
1answer
2k views

How do I resolve this data source connection issue with Cognos?

We have (fairly recently) installed IBM's Cognos 10 as our business intelligence reporting tool. Most of the databases that we report over are DB2 9.7 LUW Enterprise Edition. We installed the DB2 ...
0
votes
2answers
84 views

SQL Server Stored Procs not parameterized, leading to high compilations?

We're experiencing about 300 SQL Compilations per second, and we use very little dynamic SQL. However, I noticed that in SQL Profiler our calls look like: exec cid.dbo.uspCIDLog '9425','19155852234',...
2
votes
1answer
323 views

Execute Queries Against CMS within SSRS Reports?

Is it possible to execute queries against a Central Management Server (CMS) using SSRS? For example, I know of no way to tell a stored procedure that it is inherently supposed to call the CMS, so it ...
0
votes
1answer
8k views

Remove an instance of “SQL Server 2008 R2” after reinstalling “SQL Server 2008”

I have installed "SQL Server 2008 R2" with an instance name "SQLEXPRESS". Then I found out it cannot restore from my older "SQL server 2008" backup files . So I uninstalled SQL Server 2008 R2 and ...
7
votes
2answers
2k views

Database for building a realtime analytics system

I want to build a system similar to Google Analytics (only used for internal use, less traffic and less feature), and mainly focus on Real time counting of unique URI visit/PV by different ...
5
votes
1answer
2k views

Performance difference between SQL Server Linked Server and direct query

A Management Studio query pane connected directly to a remote sql server executes and displays a simple table query of (SELECT * FROM table) in just under 2 seconds. The same Management Studio but ...
6
votes
4answers
3k views

What is the best approach to parsing a large amount of strings?

I have a table with over 400,000,000 records and I am looking for advice on how to parse it quickly. TheNameTable ( NameID int primary key, TheName varchar(500) ) The names are stored like ...
1
vote
1answer
266 views

MySql cluster data node replication

What I'd like to do is to replicate data nodes within a cluster not only for backup/failover purposes but also for scale-out reasons. Is this possible? If not: why? If yes: how do I do it? Actually, ...
15
votes
3answers
3k views

Does a SQL Server bit column really use a whole byte worth of space?

I was poking around SSMS and noticed the "size" of my INT columns were 4 bytes (expected) but I was a bit shocked to see my BIT columns were a whole byte. Did I misunderstand what I was looking at?
1
vote
1answer
421 views

Design SQL Server 2008 new install … which collation?

A customer has a SQL Server 2005 instance, collation SQL_Latin1_General_CP1_CI_AS, with 8 databases ... for a new application, we have been asked to install a SQL Server 2008 with collation ...
2
votes
1answer
4k views

MariaDB XtraDB Performance Tuning

I believe that innodb has a single read thread. However, with MariaDB you can set multiple read threads. I'm unsure what the recommended value would be. Questions Does anyone have any experience ...
5
votes
1answer
2k views

How to index dynamic attributes in MongoDB

I have following kind of data (simplified a bit from my real case) in MongoDB: { "name":"some name", "attrs":[ {"n":"subject","v":"Some subject"}, {"n":"description","v":"Some ...
1
vote
2answers
735 views

Email notifications in SQL Server 2008

I have set up 2 profiles. I can send a test email ok to one profile. I have set up 2 operators. I have a simple job (select coount(*)) which when it completes should send an email notification to the ...
2
votes
1answer
276 views

Query tuning - SQL Server

One of our developers are trying to run the below query on a development server, which involves pulling data from a linked server, production. The query ran for more than 14 hours before it was ...
2
votes
1answer
113 views

don't want to be able creating stored procedures with incorrect

Right now I can execute a CREATE PROCEDURE or an ALTER PROCEDURE script with incorrect table and column references in the MS SQL Server Management Studio and using ADO.NET commands. The scripts run ...
5
votes
1answer
238 views

Does the transaction isolation level affect indices as well?

Here's one for the SQL Server gurus: if I set my SQL Server 2008 transaction isolation level to READ UNCOMMITTED, does that also affect the index pages? E.g. using ISOLATION LEVEL READ UNCOMMITTED, ...
-2
votes
1answer
1k views

Query database by date, month, year

How can I query order by date. Like this: And the same for week, month, year...?
3
votes
3answers
1k views

Does sp_spaceused data contain more than the sum of each table data?

I wanna monitor the size of each table in my database. After doing so, I was wondering why the sum of the data of each table does not correnspond to the data size of the whole database I get after ...
10
votes
3answers
7k views

Where can I find example databases for MySQL, SQL Server and Oracle?

I want to experiment with the 3 large database management systems. For this purpose it would be cool to have the same database (the same tables, etc.) for each of those. Where can I find sql scripts ...

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