5
votes
1answer
551 views

When should startup parameter -E be used?

We are starting to build a data warehouse system using SQL Server 2008 R2. One of the senior DBAs told us to consider using a startup parameter -E for the SQL Server service. I read from Books Online ...
3
votes
2answers
194 views

Is it always bad to use SELECT * FROM?

It is widely recommended NOT to use SELECT *. I understand this, as it is not a good idea to bring the entire row into memory, when only a few cells are needed. Is it still bad to use SELECT * when ...
1
vote
1answer
2k views

Use of Shrink after rebuilding Indexes in sql server 2005

I need to create a weekly database plan for my company's databases (5.8Gb), now I want to rebuild the Indexes, and then want to trigger a Shrink operation. Now I know Shrink creates Index ...
2
votes
1answer
46 views

Insert command not showing schema details

I need to back up a table from a database schema.The table is located under kdb28_test_h and a schema named kref. I tried with the following code pg_dump --host=110.11.12.16 --port=5432 ...
1
vote
1answer
359 views

Simulating having multiple Control Flows in a SSIS package

I have a SSIS package that in its Control Flow I have quite lot of Data flows. To be able to organise them, I have wrapped the related Data flows into Groups. For example I have 5 groups as below ...
0
votes
1answer
140 views

How triggers are called when we have two triggers?

In a table I have two triggers. When it is called for the first time the first trigger does not fires while the second trigger's got fired. On the next call both first and second trigger action take ...
6
votes
2answers
1k views

How can I organize my tables?

My database contains more than 200 tables. When I want to modify or insert a table, I find it difficult to find it among all those tables. Is there any way to collect related tables in a folder ...
3
votes
0answers
107 views

MSMerge_contents Table Populated After One Sync

I am running merge replication with SQL 2012. When I first create my publication the MSMerge_contents table is populated with a large number of records with the colv1 being set to 0xFF. When I run ...
2
votes
0answers
140 views

How To Analyse Index Scans

I am using merge replication with SQL Server 2012. During a sync using a merge agent there are a large number of index scans. I can see this by running a profile capturing SCAN:Started and ...
4
votes
1answer
3k views

Innodb, MySQL 5.5.28 - Segmentation Signal 11 faults, on high load. .. my.cnf file included

We have a high-end server, 128GB RAM, 32 Core , Xeon, SSD RAID 10 - running Ubuntu 12.04 with MySQL 5.5.28 . Doing random imports to large InnoDB tables, over 50+ gigs, randomly after a few hours of ...
0
votes
2answers
76 views

How to modify MySQL 5.5 settings that were set during the installation? [duplicate]

Especially the one that defines how MySQL is gonna use server's CPU. I'd like to boost performance. Also, what are other ways to boost MySQL performance? (Maybe some code optimization hints?) Anyway. ...
6
votes
3answers
4k views

Is it possible to see the (completed) SQL Statements executed by a specific session?

Is it possible to see a list of all past SQL statements executed by a specific session (or number of sessions)? For example, the following query gives me all currently executing statements from all ...
4
votes
1answer
174 views

How can I improve this DB query? it takes too much time

The query is this: $today = $date->getTimestamp(); SELECT t.*, u.screen_name, u.profile_image_url FROM table AS t LEFT JOIN users AS u ON t.user_id=u.id_str WHERE ...
2
votes
1answer
376 views

Is it normal for tempdb TPS to be higher than all other databases combined?

I'm investigating some performance issues on a production DB here, and I've noticed a slightly odd thing that I'm not sure is weird or not. If I run a quick Performance Monitor trace for the ...
4
votes
1answer
3k views

What is PostgreSQL database ownership

When creating a PostgreSQL database one can assign another role to be an owner of that database. What can the new owner do with this database? How is it compared to grants?
5
votes
2answers
1k views

One Complex Stored Procedure Causes Estimated Cost Exception

In SQL Server, I'm getting the following error "The query has been canceled because the estimated cost of this query (5822) exceeds the configured threshold of 300. Contact the system administrator." ...
5
votes
3answers
359 views

SQL Server how to test filegroup IO

We have a customer who is switching from SAN storage to directly attached storage. Our SQL Server database has several filegroups all of which has been deployed on the same LUN. In order to determine ...
2
votes
2answers
164 views

SQL Server memory issue

As soon as I start SQL Server with no application querying, in the task manager it starts to consume memory very fast till it consumes around 15GB. How can I resolve this issue?
6
votes
3answers
2k views

Dynamic database reference in T-SQL scripts

We have a set of databases (development, QA and production, dev-foo & dev-bar, qa-foo & qa-bar and just foo & bar respectively). Inside foo family of databases there's a view that should ...
2
votes
0answers
519 views

Transactional Replication Error adding new subscription (null) article

When attempting to add a new subscription to an existing Transactional publication on 2008. It is all configured on 1 server as it is for Pre-Production testing. I get the following error when ...
4
votes
1answer
681 views

How to Update same table on deletion in MYSQL?

In my Database I have a table: Employee with recursive association, an employee can be boss of other employee. Following is query I used to create table: CREATE TABLE IF NOT EXISTS `Employee` ...
1
vote
0answers
505 views

Finding the bottleneck by analyzing Munin graphs

We’ve been experiencing some issues with our database server during peak hours. In our Nginx error-log we can see that a lot of requests get timed out. The requests are also very slow. We have had ...
2
votes
1answer
7k views

PostgreSQL duplicate key violates unique constraint error

CentOS 6.2 64bit Server PostgreSQL 8.4.9 installed via yum I am seeing errors from time to time in PostgreSQL's logs about a table called events. The events table is used to stores information ...
4
votes
1answer
1k views

Retrieving data if control file is lost in oracle Database

Suppose if the databases control file is lost permanently (no backup). Can we retrieve the data from data file in Oracle database?
4
votes
1answer
391 views

T-SQL and GPS co-ordinates

I'm looking to store GPS co-ordinates in an MS SQL Server DB for location matching of users with GPS-enabled mobile phones. I've read about STDistance on MSDN, but it only appears to exist in SQL ...
0
votes
1answer
144 views

How to determine why connection creation lasts so long?

On one of my servers (Windows 2008 Server), creating connection in Java to PostgreSQL server takes from 1,5 to 4 seconds! I have no clue how to start checking what can be wrong. I tried different ...
1
vote
0answers
3k views

restore compressed dump query in postgresql asks password [closed]

I'm using ubuntu OS and I took backup using sudo -u postgres pg_dump dbname | gzip > filename.gz in the file path as... /home/administrator/Documents/DB_Backup# sudo -u postgres pg_dump dbname ...
2
votes
1answer
641 views

Best patterns for encrypting database columns/tables in SQL Azure

Azure SQL doesn't support many of the encryption features found in SQL Server (Table and Column encryption). What is the best practice for doing application level encryption into a database that ...
3
votes
1answer
204 views

Referential Integrity in schema, cascading the renaming

In phpMyAdmin, while renaming a column/table which is referenced by some foreign key, I get an error. I can not rename a column until I remove all its relations. There should be facilitated integrity ...
6
votes
5answers
5k views

Is it advantageous to scale out using multiple SQL Server instances on the same server?

For a use-case of 9 databases spread across 3 time zones, is it advantagous to spread the databases onto multiple SQL Server instances on the same server? What will I gain and what will I lose? ...
1
vote
1answer
697 views

My SQL server showing different result with same query execution at different time

When I execute below query from MySQL server, it shows me different output for each time even though database is stable and not used by anyone except me. SELECT TABLE_NAME , table_rows FROM ...
1
vote
1answer
88 views

Sharded Mongodb Communication

I would like to know what ports I need have open for a sharded mongodb cluster. For example does the mongos need to be able to accapt connections to and from mongoc. I dont want to have to many open ...
1
vote
1answer
133 views

Database development/admin - What exactly should I be trying to learn? [closed]

(I tried posting to programmers.se but was told this might be a better place) My apologies if this isn't true I've been a bit weary about approaching learning databases. I've dabbled into them ...
2
votes
1answer
1k views

Oracle 10g using collection with sql

I have a stored procedure that takes collection of objects. (TABLE OF MyCustomType). Inside the procedure I'm trying to join this parameter with real tables. For example, something like create or ...
0
votes
1answer
536 views

Does The Stored Procedure sp_removedbreplication Remove Rowguids

In merge replication if I run sp_removedbreplication will that remove rowguids or not? Will it take into account the preserve_rowguidcol values in the sysmergearticles table?
4
votes
1answer
83 views

Selecting Without Repititions

I have table with observations of objects moving along edges in a graph, this table has the following form: PK | TIMESTAMP | object_id | from_id | to_id where object_id is the id of some object and ...
2
votes
1answer
332 views

Imposing column level security on a view for different user [duplicate]

Possible Duplicate: Column level security I have a view which can be viewed by multiple users, and I would like to restrict some columns to specific users. e.g I have a view with fields A, ...
3
votes
2answers
108 views

Searching for pairs of date/time values in a single row

I have a legacy IBM DB2 database table that contains lots of records of phone calls. It has columns for ID, customer number, employee who took the call, etc. The date/time for each call is kept in a ...
2
votes
1answer
867 views

Update ranking on table

I have two tables: mysql> desc rank ; +----------------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | ...
4
votes
1answer
608 views

Restore Database on Active Passive Failover Cluster

Well, I helped my boss's boss install 2 nodes of SQL Server 2008 on a Windows server 2008 failover cluster. I did this remotely and I don't have accesse to it. (I run a active-active cluster on Server ...
4
votes
2answers
357 views

Why might my Postgres table be growing?

I've got a table that grows under Postgres 9.1. It's a high-throughput table with lots of inserts and deletes, but it should generally remain between 1-2k in terms of number or records. Auto-vacuum is ...
4
votes
1answer
585 views

I have multiple ibdata files : What should I do with them?

I have 3 different ibdata files on disk. What is the difference between them? Can I remove some of them? The goal is to migrate the files from C: to E:... I'm on MySQL 5.0.x... Directory of C:\MySQL ...
1
vote
1answer
2k views

Another BCP Export [Fail]ure

All, in SELECT Data Set Using Stored Procedure with BCP Error @Remus Rusanu provided a great solution to the problem. However, this evolved in to another problem: this BCP query now runs DECLARE ...
2
votes
0answers
738 views

Parameters in queries using vba

I am trying to write a process to run several prewritten Queries in a row without any human interaction. I tried to write a macro, but the after saving it it still prompted for the date range in the ...
5
votes
2answers
3k views

Why isn't the objectname and indexname populated in deadlock graph?

I got a request to check out some errors on a 2008 sp3 server (10.0.5500.0 - Enterprise Edition (64-bit)) and see if I could find deadlocks that were happening earlier. Traceflag 1222 wasn't enabled ...
-5
votes
1answer
118 views

Advice for designing a complex/multipart application [closed]

I'm designing a software application for my medical carrier. It is very complicated, with many parts and many small details. Some experts advised me to divide it to parts, then design the database ...
1
vote
1answer
88 views

PostgreSQL custom domain with trigger

Is it possible to create custom domain / data type and associate some trigger with it, for example hash password? I will have for example password domain and if I set some value to this column, it ...
1
vote
3answers
2k views

SELECT Data Set Using Stored Procedure with BCP Error

All, I have a BCP export query. It is failing with the useless error mesage on BCP usage: usage: bcp {dbtable | query} {in | out | queryout | format} datafile [-m maxerrors] [-f ...
1
vote
1answer
253 views

Merge Replication SQL

I am currently having a problem with the following Creating a merge replication is simple if the servers are on the same network, i would like to know how can i do a merge replication if the servers ...
3
votes
1answer
1k views

Distinguish between schema and database

I had the error cross-database references are not implemented: scan.location.alias with this PL/pgSQL code: DECLARE v_tmp_host scan.location.alias%TYPE; v_ip_address character varying; BEGIN ...

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