0
votes
2answers
68 views

How to use keys in a table so two columns are unique

I want to create a basic database that handles photos. Also, i want to show a photo of the day to the user. I´ve created a table called ´photo´ and another table ´photooftheday´, like so CREATE ...
7
votes
0answers
226 views

Why would function based indices I’ve created lower the cost but not show up in the explain plan breakdown?

Sorry for the terrible column/table names but since this is for a work project I wanted to insure it was OK to ask. I was just hoping to at least learn why I'm not seeing my functional indices being ...
0
votes
4answers
100 views

SQL Where Clause Efficiency

Say I have a SQL statement: SELECT * FROM MyTable WHERE KeyColumn1 = 1 OR KeyColumn1 = 2 OR KeyColumn1 =3 OR ... KeyColumn1 = 10 And another: SELECT * FROM MyTable ...
0
votes
1answer
175 views

Slow queries with many self joins in variable-column database

I'm creating a table structure which needs to handle a variable number of columns. To handle that case the table structure is a listing of cells with a column and row number. To view the table a ...
0
votes
0answers
14 views

In Amazon Redshift, running GRANT as a superuser does not grant privileges on table to a regular user [duplicate]

I'm trying to run a query in Amazon Redshift, but I keep getting the error permission denied for relation mytable As far as I understand, this is a privileges issue. According to this question: ...
2
votes
1answer
33 views

Splitting metadata inside Postgresql

I have metadata in a postgresql table that I need to split. So far I have been attempting to use Select col_name from "tbl_name" split_part('QGC|WGPLNW|IR|BBC|FCPC|WGPLNW|ARME|QPC', ", 1 | 2 | 3 | ...
1
vote
1answer
184 views

MySQL: SLEEP injection

I was wondering if someone could help to understand this query, basically I'm aware about SLEEP() function but I've never seen this implementation before. Why there are no any results returned? ...
1
vote
1answer
490 views

SQL Server - Service User Accounts and Licensing? [closed]

Maybe this is the wrong place to post, since its not necessarily sql server related, but here goes. If I want to setup some service user accounts in the domain to use to run sql services like the sql ...
5
votes
2answers
5k views

Find which session is holding which temporary table

We have a SQL Server 2005 database the temp database has become full. By going into SQL Server Management Studio I can see all the temporary tables in the tempdb. Is it possible to tell which session ...
0
votes
1answer
132 views

Nightly reload of tables from a linked server

I have a number of tables that need to be reloaded nightly from a linked server. My current method of doing this is to create a nightly job to pull the data using something like the following: ...
1
vote
1answer
1k views

Is there anyway to make this stored procedure thread safe?

I have a stored procedure that deletes X rows. This procedure is called by a Job Scheduler (Not SQL Server Agent) from one of three Azure Instances. The deletion task is run every 30 minutes from each ...
2
votes
0answers
192 views

Cross-talk with temp tables with SSRS over a shared data source?

I have a data source that is setup to store credentials on the report server and to use them when running reports. Given the following factors, I'm concerned about reports that use temporary tables in ...
0
votes
1answer
169 views

Is there any danger using binary data over an UTF-8 MySQL connection?

My application uses UTF-8 as the default encoding for all fields, and the connection itself; every connection starts with: SET NAMES utf8; I need to store a few SHA-1 hashes though, and for ...
0
votes
1answer
123 views

Comparing INT and NVARCHAR

T-SQL newbie here. I am sure you guys can help me with a little problem I'm having. Here's my situation: I want to do a select from a certain table. And with that select I want to display the count ...
1
vote
0answers
208 views

Master and slave tables with different character sets - will replication break?

We have some huge tables in our MySQL 5.6 database that have latin-1 as their character set, and want to convert them all to UTF-8 (along with converting the database's global character set). The ...
1
vote
1answer
897 views

sqlsrvr.exe is not using all memory

I have no clue what to set up more. I tried a lot. My Problem is that on my test Server everything is runing perfectly see but on my production Server its not! see I found this on my ...
0
votes
0answers
37 views

Delta data finding

I need to build a database that contain only the delta from yesterday by comparing two databases, finding out the following: What rows were Inserted What rows were Deleted What rwos were Updated ...
6
votes
2answers
181 views

Altering db schema in production environment

I have some questions on db schema changes in production environment without taking the database server and the webapp offline. Q1- I want to be able to make changes to database schema (adding, ...
-3
votes
1answer
69 views

Need help on query optimization in MySQL

Below is the query, I need to optimize it. It is using subquery, I need to re-write it using join how to do this SELECT Client_ID FROM SQL_AuditPro.clients c WHERE (SELECT ...
1
vote
0answers
189 views

how do I debug postgresql 9.1 server terminating

my /var/log/postgresql/postgresql-9.1-main.log shows 2014-03-25 10:39:30 CET HINT: In a moment you should be able to reconnect to the database and repeat your command. 2014-03-25 10:39:30 CET LOG: ...
0
votes
1answer
115 views

How to ensure a trigger is fired after variable number of inserts?

I have a 1:N relationship between two tables - let's call them "foo" (the parent table) and "bar". I have some triggers on both "foo" and "bar" tables. I insert data in a single transaction, first to ...
0
votes
1answer
207 views

MySQL is not logging queries into log file

I am using MySQL 5.5 with Amazon Linux 2013. Following is my configuration for log file. slow_query_log = 1 long_query_time=0 log-error = /var/log/mysqld.log slow_query_log_file = ...
1
vote
0answers
169 views

Distribute records on different MySQL databases - MySQL Proxy alternative

My scenario is the following: Right now I am using one big MySQL database with multiple tables to store user data. Many tables contain auto increment columns. I would like to split this into 2 or ...
0
votes
0answers
370 views

Execution time is different between normal query and query inside a stored procedure

I have following simplified query WITH Report1 AS ( SELECT SUM(t.X), SUM(t.Y) FROM Table1 t WHERE t.Date1 > :dateStart and t.Date1 < :dateFinish ) SELECT * FROM Report1 This query ...
0
votes
0answers
90 views

Enterprise Manager goes pink, legend color for other

To whom it may respond to, While monitoring our databases, we have seen that one of EM screens has gone pink, the color stands for OTHER at the legend. We have checked alert log and trc files, ...
2
votes
1answer
73 views

Clustered index additional storage

Reading some books I found that clustered index not require additional disk space for storing index data, because leaf level of clustered index are data itself. But, as clustered index is organized ...
1
vote
3answers
2k views

How can I change the names of all tables to uppercase?

User created one database, for example TestDb. Within this database the user created 30 tables, with the table name in lower case letters (Eg:Employee). Is it possible to change the tables names to ...
1
vote
1answer
3k views

How To Export-Import Database in Oracle 11g(Application Express Edition)?

I am beginner in Oracle 11g. I have created a database in oracle 11g(Application Express). I want to export this database with all data(whole workspace) and import this to another computer where I ...
2
votes
3answers
391 views

Restore large MySQL dump thorugh EasyPHP

I am trying to upload large files on easyphp but as there is limitation on this software and large databases cannot be uploaded. Is there some other software that allows to import large databases? ...
0
votes
1answer
2k views

“Invalid option” while creating a tablespace

Can someone tell me what is wrong with this syntax: CREATE TABLESPACE ACME_DATA DATAFILE '/oracle/d02/acme/ACME_DATA_01.dbf' SIZE 40M EXTENT MANAGEMENT LOCAL AUTOEXTEND ON NEXT 2M MAXSIZE 100M ...
3
votes
1answer
5k views

Postgres is stuck in recovery mode

I have a stand-alone instance of PostgreSQL which is in recovery mode. It has been saying 2014-03-24 18:45:57 MDT FATAL: the database system is starting up For many hours, and ps shows: postgres ...
0
votes
1answer
1k views

What is best strategy for backup on streaming replication(hot standby) environment

I have questions. What is best strategy for backup on streaming replication(hot standby) environment. I’d like to do backup on slave server and restore(PITR). First, I set up streaming ...
1
vote
1answer
58 views

How to store chains of information?

I am currently trying to design a table structure that can capture report data (from various sources) in an ordered fashion. Let me give you an example: Each day I receive three separate reports ...
3
votes
1answer
2k views

Postgresql subquery speed much slower than individual queries

In Postgres 9.1. I am attempting to do a single query to get the timezone of a given postal code. I have data loaded in my database, and I am using PostGIS to store the coordinates of each postal ...
4
votes
0answers
284 views

RDS MYSQL instance rebooted and won't load INNODB table

So my production db in RDS apparently either crashed or was rebooted during a version update, and upon being restarted mysql couldn't load one of the innodb tables: as evidenced by the following error ...
3
votes
2answers
1k views

Does a MyISAM table locks if I copy it while MySQL is running? (READ DISCLAIMER)

DISCLAIMER: I'm very aware this is not supposed to be done, but time consistency between tables aren't a concert here and Im trying whatever pops in my mind right now to have alternatives for ...
1
vote
1answer
117 views

Sybase ASE 12 question

I support a database that has many tables that hold very similar data. Over time, much of this data isn't needed, and the table names are dynamic as an application is creating these tables, and the ...
10
votes
1answer
1k views

Why would you use a managed service account rather than a virtual account in SQL Server 2012?

In SQL Server 2012, service accounts are created as virtual accounts (VAs), as described here, as opposed to managed service accounts (MSAs). The important differences I can see for these, based on ...
3
votes
3answers
717 views

Can You Drop Consistency from ACID?

In his book "An Introduction to Database Systems" C.J.Date wrote a chapter about the ACID principles called "Dropping ACID". In this chapter he calls Correctness(Consistency) "essentially meaningless" ...
1
vote
1answer
237 views

Move SQL Server XML column to a new table - slow performance

I have a table with a XML Column, each XML document size is 15kb and I have like 2 million rows. I need to move this XML column into a new table. I tried: insert into newtable select xmlcolumn ...
0
votes
2answers
270 views

Can CPU cores be separated for MySQL?

Is it possible to separate CPU cores in Mysql? I understand it is possible for Memory as we can tune it in innodb_buffer_pool_size or innodb_additional_mem_pool_size. How about CPU cores in ...
3
votes
2answers
157 views

Enhance performance of update query

I have a query that is running against a table with 50 million rows. The phone number is stored as a CHAR(10) and an ETL process is changing the phone number if it has certain values. We are seeing ...
2
votes
1answer
95 views

DB2 9.7, create or replace tablespace possible?

I am creating my tablespaces in the sql scripts that create the database schema. This causes a problem in continuous integration processes, where consecutive execution of the script is not possible ...
7
votes
2answers
26k views

Installing SQL Server 2012 Express fails with error “ Could not find the Database Engine startup handle.”

I'm attempting to install SQL Server Express 2012 w/ SP1 x64 on Windows 7 SP1 x64. This machine has previously had SQL Server Express 2012 installed. This instance was upgraded to SQL Server 2012 ...
0
votes
2answers
95 views

SQL Server - creating a historical data backup

I've run out of space on my SQL Server 2008 Express DB. i'm creating a "duplicate" SQL Server 2008 Express DB so i can backup my data before i purge my DB so i can start over. Is there a way in SQL ...
0
votes
1answer
471 views

PL/SQL cursors and records

I am a new to Pl/sql and I need to learn to write simple pl/sql scripts. Is there any difference between cursors and records in PL/sql? So far I find them both similar.
1
vote
1answer
130 views

Create USER and LOGIN permissions

What permission should I give to a user or role so that it can Create Login or Create User in database.
0
votes
0answers
80 views

Recover the postgres data if hard drive fails in CentOs 6

How can I recover PostgreSQL the data if the hard drive fails? I am getting error like error: Invalid Page in block of relation /base/32769/12766 So I have corrupted my entire table - what should ...
1
vote
1answer
213 views

Delete log to increase DB space?

I'm running SQL Server 2008 Express and hitting the 4GB size wall. I'd like to make some space to give me time before i migrate to a larger DB. I don't need my transaction log. So, can i delete ...
0
votes
0answers
152 views

Unable to send WHERE parameters to subquery

I have the following problem (in PostgreSQL in combination with PostGIS): I have the following nice query who clusters multiple records. Although it uses PostGIS function, my problem is not PostGIS ...

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