2
votes
1answer
211 views

Is there a negative effect if I place an index on every column in a wide table?

We have a wide dataset that isn't very tall (say 250K rows, 90 columns). We will be providing users with an interface that allows them to generate arbitrary queries against this dataset. They can ...
0
votes
1answer
547 views

Join 3 tables returns too many results [closed]

I have 3 tables: users, posts, videos. The last 2 tables have user_id that associate with users.id (first table). The problem is that when I try to run inner join query and return all posts and ...
1
vote
1answer
56 views

Why changing the database owner doesn't change the owner in PostgreSQL dump?

I was exporting a database using pg_dump command when I realized that the owner of the database had to be changed. So I change it, and make extra sure that the newuser is correct. Then try the command ...
2
votes
1answer
3k views

Error Creating Foreign Key in Oracle

I have 2 tables: PRODUCTS PREFIX SUFFIX ATTR1 ATTR2 ----------------------------------------------------- 001 AAA 50 100 001 BBB 20 300 010 ...
4
votes
2answers
3k views

could not save history to file “/var/lib/postgresql/.psql_history”: No such file or directory

I'm following this tutorial to set up my postgresql db. http://inventtheweb.blogspot.ca/2012/05/install-postgresql-for-django.html After I finish running the CREATE DATABASE command and run \q I ...
1
vote
2answers
4k views

Improve query performance when selecting almost all rows with many “group by” columns

I have a table with 20 columns and about 600,000 records. The maximum row size is only around 100 bytes. The table is repopulated every few days, but the number of records remain about the same. For ...
3
votes
6answers
1k views

Database Normalization - Can one field point to another?

This may sound like a dumb question, but I am a software developer new to database design... So the concept makes sense to me, but maybe this doesn't carry-- Is it possible for a field in a record ...
1
vote
2answers
53 views

Designing a Course Equivalency Database

I am trying to create a database to store information regarding equivalent courses transferring from one school to another. I am struggling to conceptualize the relationship in a way that can ...
1
vote
2answers
515 views

Converting MSSQL Stored Procedure to MySQL - Syntax Error

I am converting a MSSQL Stored Procedure to MySQL, and am running into a problem. Maybe it's because I have been staring at the code for so long, but I can't seem to figure it out: CREATE PROCEDURE ...
1
vote
1answer
377 views

After log shipping, I activate failover with a RESTORE. What happens when the next log shipping job runs?

I'm using log shipping for the first time. I've got it working between my primary and secondary server, on the secondary server the database is Restoring... which I understand basically means it is ...
1
vote
2answers
117 views

SQL*Plus save current COLUMN settings

In SQL*Plus, is there a way to save current COLUMN settings similar to STORE which saves SET commands in a script? COLUMN can be used to list the settings, but they are not in script format.
2
votes
1answer
146 views

Running a query over the network multiple times seems to choke performance, how can I pinpoint the problem?

Background: Oracle 11g running on Windows 2003 x64 SP2 on a 3.06GHz Xeon X5675 with 16GB RAM Over the past 3 weeks, a query I used to run approximately every 5 minutes has started to respond very ...
7
votes
2answers
2k views

Efficient query for an advanced EAV model

I'm kind of stuck on how to build an effecient query which returns the data of the following EAV structure. Today, a product table already exists, containing 4 fixed fields. We want to upgrade the ...
0
votes
1answer
390 views

Problem creating database using default mdf and ldf path

I'm trying to create a database using the default paths on several SQL Servers at once. To achieve this I'm trying to use a script that should create the database on each server, however I've run into ...
0
votes
1answer
289 views

UPDATE not working properly with linked server

Please see a question I asked here earlier: http://stackoverflow.com/questions/24324823/update-not-working-properly-with-linked-server Dommer suggested using OPENQUERY and this does appear to resolve ...
0
votes
1answer
92 views

Creating and designing Air Trafic Control System [closed]

I'm having a class about Database management system, and the prof. gave us a project regarding Air traffic controller system, exact question is "Design and create a system which can manage ...
-1
votes
1answer
253 views

mysql xtrabackup missing binary logs

It seems xtrabackup is not backing up binary logs, although it creates xtrabackup_binlog* with apparently correct information inside. Should the binary logs be copied manually beforehand or is this a ...
1
vote
1answer
4k views

Understanding pagefile.sys % Usage performance monitor (perfmon) counter correctly

Lately we run into performance inssues and I started tracking some recommended sql, memory, disk and cpu counters. I informed myself about the recommended values and numbers to look at. One of the ...
1
vote
1answer
1k views

What datatypes can cause “String or binary data would be truncated”?

What kind of datatypes can cause the "String or binary data would be truncated" error? Varchars and other strings are obvious, but what about the "binary data"? Can this include integers or datetimes? ...
0
votes
1answer
84 views

Unsure of Rank / Dense_Rank - Mulitple Columns - change rank when unique combination changes

I need to get the unique combinations of 2 fields, with a RankID for each unique combination In this example I need to create new IDs for each Customer/Value combination. Source table: CustID ...
0
votes
1answer
89 views

Mongo DB Backup & restore

0 down vote favorite I have a DB with 150GB of data. I am using the MongoDump and Mongorestore methods to backup and restore. My production server is running Mongo 2.2 and my test server is 2.6.1 ...
-3
votes
2answers
864 views

how to solve slow running sub query TSQL

I have a problem with a slow running query. I have analysed the query with the sql server profiler but I can't seem to find a good solution. I did find why it is running slow. If ask the full ...
0
votes
1answer
143 views

SQL query for all combinations without repetition

I need a function for calculating combinations without repetition from a list. Example: I have a list of names e.g. Tom Bob Paul Tina Now I need a list of 3 names out of the 4 without having a ...
1
vote
0answers
160 views

dbms_audit_mgmt.clean_audit_trail not purging

my current database version is 11.2.0.3.0. I'm trying to purge my audit trail with a procedure. In my procedure I got this part of code: SYS.dbms_audit_mgmt.clean_audit_trail( audit_trail_type ...
0
votes
1answer
178 views

Issue working with Postgres on Windows

I am running PostgreSQL 9.3 on my machine. I have PhpPgAdmin running on a cloud, using which I exported the database I am supposed to be working on, selecting "Structure and Data" and "Download". ...
0
votes
1answer
36 views

Best scenario for replication type

We are using SQL Server 2012 and we have the Main office server. All modification on the product pricing table is done through the Main office. We have 10 remote sales branches. Those remotes ...
0
votes
1answer
548 views

SQLCMD mode: environment variable syntax?

I assume the best way to set my SSMS (SQL Server 2005) output file path during runtime of T-SQL, is to use SQLCMD mode. How do I use environment variables (e.g. %systemroot%) in the code? The ...
3
votes
1answer
84 views

Problems while building plpgsql_check on Windows

I try to build plpgsql_check extension by @PavelStehule (Erwin Brandstetter recommended it to me in this answer) on Windows XP 32bit with Visual Studio 2010 (I used this article as a manual). However, ...
4
votes
2answers
12k views

What is the use of “Backup set will Expire:” option while creating Backup Database task in Maintenance plan

While backing up the database, I would like to use "Backup set will Expire:" option to delete/overwrite old database backups. I am not able to use this option. Any advice on how to use "Backup set ...
0
votes
1answer
76 views

Transforming Huge Database table to Another Table

We are migrating lot of data from our old database to new database. Presently, both of them are actively[writing/reading] used based on flows/activity as migration is in progress. Here's the real ...
2
votes
3answers
2k views

Identity column as clustured index bad idea?

Its just been a few months of programming in SQL Server for me so my knowledge is not good in many regards. In an already existing project at work I came across many tables with large composite ...
0
votes
1answer
99 views

Performance tuning in Sybase

Does Sybase have a tool like AWR in Oracle which can be used to identify high load SQL, tell the important waits that are happening, help in understanding the workload? What are the main tools to be ...
0
votes
1answer
61 views

Can I get some comments on my database design? [closed]

I have designed a database for my institute. Here I have attached my design for better understanding. I am expecting your reviews who are professional for the database design.
0
votes
1answer
232 views

How to get pg_archivecleanup on Amazon Linux 2014.03?

I have an Amazon EC2 instance based on Amazon Linux AMI 2014.03. I installed PostresSQL from their repos: yum install postgresql-libs postgresql postgresql-server postgresql-devel I've read about ...
2
votes
2answers
413 views

MySQL user without SUPER privilege

This may be a simple question and may not be the right place to ask but I couldn't find any useful information from Google. Here is my question. When creating users in mysql using grant all ...
2
votes
1answer
2k views

Get only overall summary WITH ROLLUP and GROUP BY for multiple fields

Performing a WITH ROLLUP when grouping by multiple fields, MySQL returns a rollup row for each group, as well as the overall summary: CREATE TABLE test (name VARCHAR(50), number TINYINT); INSERT INTO ...
0
votes
0answers
20 views

Check if any user uses a database? [duplicate]

I'm going to drop a database. I want to monitor if any user is still using the database for a couple of months. Besides profiler, is there a better way to monitoring activities on a database?
1
vote
1answer
840 views

GROUP BY two different columns

I store hits. My table looks like this: ID | time | Country -------------------------------- 1 | 01:00:00 | France 2 | 01:00:00 | France 3 | 01:00:00 | Brazil ...
0
votes
1answer
67 views

What is the distinction between ALL_PROCEDURES and DBA_PROCEDURES, and other schema tables?

I recently failed to find a known procedure when searching ALL_PROCEDURES, and on a whim tried DBA_PROCEDURES: lo, there it is. The doc pages (ALL_; DBA_) both say "...lists all functions and ...
2
votes
2answers
485 views

Importing different file types to SQL Server

I'm looking for direction here. I need to automate a process that will import several different file types into SQL Server. They are all text based files (no excel) but the internal format of the ...
2
votes
1answer
648 views

Where do I find the tables that a role has access to in Vertica?

I'm trying to use the System Tables to fetch some metadata about the whole Vertica cluster at a table level (including permissions). Where can I find the information about permissions required to ...
0
votes
1answer
827 views

Login / Password for Oracle Enterprise Manager in VM template?

I want to setup Oracle Enterprise Manager to access our development Oracle databases. I downloaded the following VM template from https://edelivery.oracle.com/EPD/Search/handle_go Oracle VM ...
-1
votes
2answers
82 views

Master Database Custom Table - Performance Issue?

So, using this article (http://www.sswug.org/articles/viewarticle.aspx?id=22848) Use master Create table master.dbo.EvalRes (expVal real) -go Use databasename GO Create Function [dbo].[Eval] (@exp ...
0
votes
1answer
93 views

Inhibit SQL Server trigger execution

A table with various prices per item have a trigger that will update price 3 when price 0 is changed. The ERP that uses this database has a utility that when run updates the database with ...
1
vote
1answer
101 views

Postgres resource management

I'm consolidating multiple Linux boxes running Postgres into one box. Given the way Postgres handles resource utilization, would one single server service handling all the databases provide a much ...
1
vote
1answer
96 views

Conditional formatting in SSRS 2008r2

I am new to report writing and am trying to suppress rows that have zero data. I need to know how to write the conditional iif statement when I have multiple columns of data. Example account number ...
0
votes
2answers
1k views

Access the database by different users simultaneously [duplicate]

My two databases(.mdb) are placed at a network shared folder. Now at the same time few users are connected to database from the network place and doing their job. In the middle get the error like : ...
0
votes
1answer
101 views

Normalization of Time Series Data

I have a table containing various a/b test experiment performance on a daily basis. The table structure looks something like this: date | experiment | user_count | user_attr | sales ...
1
vote
0answers
93 views

Manual Fulltext index population time in SQL Server 2012

I would like to know if there is a way to see how much time did it take SQL Server 2012 to index all the data in a table? In my example I create the table, create the index and set the population to ...
4
votes
2answers
168 views

Update SQL n:n table with multiple associations

I have done this before, but before I mindlessly repeat something that I consider as a hack, I'm asking here. I have 3 tables (details left out for clarity) : inv_items id bigserial (PK) sku ...

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