3
votes
1answer
13k views

Get a fixed value on a select

I need to do a SELECT query where I get the value of the field "money". The field doesn't actually exist in the database. I just need the query to return this field with a fixed value; in this case ...
9
votes
3answers
72k views

SELECT DISTINCT on one column, while returning the other columns?

I have a query which uses three lookup tables to get all the information I need. I need to have DISTINCT values for one column, however I also need the rest of the data associated with it. My SQL ...
4
votes
1answer
129 views

unique constraint on a set

With reference to this SO question, what would be a correct way to implement Unique tag Combination Constraint in SQL Server 2005? To illustrate the problem, I make an example: A tag_bundle consists ...
4
votes
1answer
1k views

Where are queries against a linked server actually processed?

How is a query against a linked server processed? Does the linked server use its optimizer when it receives a query from a remote source? There are a few scenarios about which I'm wondering: Scenario ...
1
vote
2answers
56 views

Why this query returns rows that I don't want to be there

I'm trying to running this query: SELECT * FROM (`default_users`) LEFT JOIN `default_profiles` ON `default_profiles`.`user_id` = `default_users`.`id` WHERE `default_users`.`group_id` ...
2
votes
1answer
8k views

Enabling InnoDB on an existing MySQL production server

We have a MySQL 5.1.59 server that has 30-40 existing MyISAM databases. I need to deploy an application that requires InnoDB databases. Can I just enable/configure InnoDB in /etc/my.cnf and restart ...
0
votes
0answers
63 views

When is should/shouldn't the Entity Attribute Value (EAV) pattern be used? [duplicate]

Possible Duplicate: Is there a name for this database structure? The Entity Attribute Value (EAV) pattern usually has three columns: foreign key, attribute, and value. Attributes of data ...
3
votes
2answers
346 views

Sudden Query Performance Degradation On A Linked Server

I have an application that uses a view on a SQL Server 2008 R2 instance. This view actually queries a linked server (SQL Server 2008) that has replicated data from our main ERP database. Yesterday, we ...
1
vote
1answer
2k views

Can we back up mysql databases by copying files?

I tried to reinstall mysql on my machine, but it keeps failing. Everytime it fails, it does this locking and that locking and future effort would fail again. Finally I decided to do truly clean ...
0
votes
6answers
960 views

Equivalent of CHARINDEX OR IN for ints

I want the equivalent of this for ints. --Valid SQL DECLARE @users AS nvarchar(50) SET @users = 'Joe ,Bob,Fred,Tim' --1,2,8,23 select * FROM Person AS p WHERE CHARINDEX(p.sFullName,@users) > 0 ...
0
votes
1answer
199 views

What are the different connections of MySql?

I have a software(toad for mysql) to connect to my MySql database. We have to provide some data('username','password' etc) to this Software to connect database. There is a field known as 'connection ...
7
votes
1answer
196 views

Dynamic Dimension Security

I have a cube in SSAS 2012 with about 30 dimensions, one of which is Company. The Company dimension contains a list of companies, of which there are several hundred in the cube. Our security model ...
1
vote
4answers
773 views

Backup and restore of RDBMS(Oracle, DB2, SQL Server) from Perl

What could be the best approach ? Till now could figure out the following (Oracle) Calling exp.exe and imp.exe utilities in Oracle client using Java and inturn call it from Perl. Calling exp.exe ...
1
vote
1answer
162 views

transactional Replication of millions of updates

I have standard transactional replication setup from 2005 to 4 2008 subscribers. One of the tables that is replicated is updated several times from an agent job resulting in 6 million updates ...
2
votes
2answers
1k views

Oracle - How can I find the session id of a shell script (Linux)?

I have a Linux script run periodically from crontab which executes some sql scripts. How can I get/identify the session of that running job? thanks
2
votes
2answers
5k views

Remove the last character from Variable String

I have a few variable data in the column "email". For example: roy2087@gmail.com123 sg123@yahoo.compori How do I get rid of the characters after .com? I used Replace(email,'.com%',gmail.com), ...
3
votes
5answers
902 views

Single query to return counts over different IDs in a single record

select count(title_id)as algodata from titles where pub_id =1389 select count(title_id)as binnet from titles where pub_id =0877 select count(title_id)as newmoon from titles where pub_id =0736 ...
0
votes
2answers
2k views

Doing a comparison on two csv files with no Primary Key

I'm wondering if in SSIS there is a way to compare two csv files(with the same structure) with no reference key to make a record unique. To give you a better picture from what I mean; In initial load ...
5
votes
1answer
168 views

Retrieve Indices of Associative Array as Collection

In PL/SQL, suppose I have some associative array defined as follows: declare type a_arr_t is table of PLS_INTEGER index by PLS_INTEGER; a_arr a_arr_t; I then, sparsely, populate the ...
4
votes
1answer
385 views

Dodgy causes of ORA-12549?

I am dealing with a rather massive ETL processing which keeps throwing me the ORA-12549 error. Have been looking for problems in the database so far and nothing. The DBA says the database is "fine" - ...
4
votes
3answers
4k views

SQL Server 2008 R2 Express size

I have what I believe is SQL Server 2008 R2 Express installed on a production server. When I connect to it with SQL Server Management Studio it shows up as SQL Server 10.50.1600. If it is in fact SQL ...
1
vote
2answers
744 views

Within a RHEL 6.3 + High Reliability Add-on, how do I add DB2 (v9.7) into a service group to have the service controlled by the cluster?

I have a cluster of machines running RHEL 6.3 with the High Reliability Add-on. I have configured a Clustered Logical Volume Manager (CLVM) file system for DB2, which is working correctly. Our DBA's ...
3
votes
2answers
8k views

Copying View in Management Studio

I want to copy a VIEW from one server to another. I could copy tables but I can't copy views. Is there a way to do so? Thanks
8
votes
1answer
12k views

Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'. (MsDtsSrvr)

I have a clustered environment which has many instances in it. I have modified the xml file to allow several instances to use ssis. Everything works great when the instances are on the same node as ...
7
votes
2answers
1k views

Filtering data ordered by rowversion

I have a SQL table of data with the following structure : CREATE TABLE Data( Id uniqueidentifier NOT NULL, Date datetime NOT NULL, Value decimal(20, 10) NULL, RV timestamp NOT NULL, ...
2
votes
1answer
778 views

Export SQL Server varbinary field to string using Visual Basic script in SSIS?

I'm using SSIS to export data from a set of tables to flat files. The export is running great except for one table with a varbinary field. The export is running a Visual Basic script task to load the ...
1
vote
1answer
783 views

How can I import Create Table Statement from SQL Developer into Visio to create an Entity Relationship Diagram?

I have the following Create table statement from SQL Developer and I am trying to generate an ERD Diagram using 2003 Visio. I was wondering what I need to do to convert the Create Table from SQL ...
2
votes
1answer
1k views

Implementing “ANY” aggregate operator in T-SQL

I have a database that contains department and employee tables, and I need to return the number of employees for each department. I write the following query: SELECT d.ID, d.Name, COUNT(*) ...
3
votes
3answers
9k views

Mapped drive for Microsoft SQL Server 2008

I've noticed strange issue after this weekend. Maybe someone could explain this situation. I've got SQL Server 2008 placed on Windows Server 2008 with read/write permission to catalog ( let say ...
21
votes
1answer
6k views

How do I swap tables in MySQL?

Suppose, I have a table foo, which contains some statistics that are computed every now and then. It is heavily used by other queries. That's why I want to compute more recent statistics in foo_new ...
4
votes
1answer
156 views

Shrinking Reluctant Log Files

I have several SQL Server 2008 databases with transaction logs which have gotten out of hand and filled the drive. One of these logs was 68gb yikes. I know better than to kill off my backup chain ...
5
votes
4answers
1k views

Composing the “ultimate database maintenance script”

I'm trying to compose T-SQL script that will: A) Shrink database size to the minimum possible size; B) Make integrity checks, and completely "reorganize" and optimize the database so that it is in a ...
0
votes
1answer
3k views

Converting Python's date format to a MySQL

First of all I hope this is the right place to ask. I have a Python script which parses data from a few links. In the parsers I parse also the date of the last modified article. This is the output ...
3
votes
1answer
240 views

I have Fragmented Index on a empty table!

I ran the following query on my database to identify the fragmented indexes. However I surprised when saw the Indexes belong to some empty tables among the highly fragmented indexes! How can it be ...
3
votes
2answers
1k views

How does compound index help speed up query?

Say we have a bunch of column in mysql table. Latitude Longitude Say we make an index (Latitude and Longitude) Well, the index will sort by Latitude first and IF the Latitude is the same it'll sort ...
2
votes
1answer
2k views

What is a source table, and a target table?

I've seen alot of talk about source tables, and target tables on the internet, but no definitions of what these things are...from what I can infer it seems to mean something about copying data from an ...
0
votes
2answers
617 views

Is there data visualisation tool for postgresql which is capable of displaying inter schema relations as well?

Operating system used is linux. I have tried Navicat and SQL Power Architect. They did display relations between tables in the same schema. I have some foreign key constraints which reference tables ...
3
votes
3answers
1k views

Unique combination key MySQL

Lets say I have a table with 3 fields: id1 id2 mapTypeId What I want is a primary/unique key that is any combination of id1 and id2. For example if I have this record already in the database: ...
2
votes
1answer
901 views

Determining SQL Server memory requirements

I just a bit of an issue there where a SQL Server database was eating up quite a lot of RAM for its size. A bit of background: The database is for a small content managed website. The CMS is custom ...
2
votes
2answers
720 views

Tool to match mysql password encryption

I've created a user ... but forgotten the password mysql> create user 'blayo'@'%' identified by 'right'; Which Linux command line tool can encrypt the password the same way mysql does ? mysql> ...
1
vote
1answer
549 views

Testing an Oracle DB connection before it is made - ERROR?

I tried to make a new oracle DB connection with user name and password. I entered the connection name, user name and password in the new connection window. When I click the "test" button or the ...
3
votes
1answer
356 views

Can sql server 2000 and 2012 coexist on the same server?

I see that 2005/2008/2012 can all coexist but can't find anything on 2000 with 2012.
5
votes
3answers
6k views

database schema design for school system

I am trying to create a database to store information about a school. I need to store each department in the school. Each department then has a list of teachers. Each teacher has a list of classes ...
3
votes
2answers
3k views

MySQL Cluster: Problem Connecting the SQL node

In a MySQL cluster I have three hosts, one with a manager node, and the other two are each both a data node and sql node. Connecting to the manager is possible, however only as [ndbd] and not ...
6
votes
1answer
2k views

How to create a SQL Server 2008 backup without logs with mirroring

How do I create a backup of a SQL Server 2008 in a mirrored setup without any logs? We need to do this so that when we restore our local development databases, we would have the most up to date ...
6
votes
3answers
2k views

Does having an index on a VARCHAR column with a lot of very similar starting values have bad performance

We seem to be having quite unusual bad performance on queries that use an index. for example the table looks like PK BIGINT ID VARCHAR(50) Col1 Col2 etc So we need to insert a row in the ...
4
votes
2answers
442 views

fast bulk incrementing in MySQL

I have one big table foobar describing a many-to-many-relation and containing millions of foo's, millions of bar's and every bar having several hundereds of foo's -> billions of rows. CREATE TABLE ...
3
votes
3answers
3k views

Setting up SQL Server 2008 R2

I need to set up a SQL Server for a development environment for a client. First I installed SQL Server 2008, I was able to connect to it from SQL Server Management Studio fine but when I tried to ...
3
votes
2answers
12k views

Reset MySQL root password in LAMPP server on Ubuntu

I forgot the password I changed for the root user of MySQL. I'm logged in as root user and when I do # /opt/lampp/lampp security it gives result as XAMPP: Quick security check... XAMPP: Your XAMPP ...
2
votes
3answers
5k views

Revert to old plan in Oracle

A weekly, scheduled, schema wide stats update was run on our Oracle 11R2 RAC cluster on Sunday. One of the queries had no apparent data or code change but now runs at 3 hours instead of 20 minutes. ...

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