0
votes
2answers
8k views

Why decrease the wait_timeout configuration parameter in MySQL?

Question I'm working on an application that uses a connection pool in Apache Tomcat to communicate with MySQL. I was wondering why would you want to use a smaller wait_timeout than the default of ...
5
votes
1answer
345 views

force PostgreSQL into recovery mode

I have a somewhat strange question. Is there a way to manually force PostgreSQL into recovery mode? I've not been able to find aything in the documentation. I've been working with a script ...
3
votes
1answer
3k views

SSMS 2012 is not showing the tables of the system databases

I have SQL Server Management Studio 2012 on my laptop connected to a SQL Server 2012. If I go in System Databases and then any of the 4 (master, model, msdb, tempdb) I don't have the Tables folder. ...
2
votes
2answers
3k views

How to tune mysql to be inmemory-like

I've given MySQL 5GB of memory (I use innodb), but when I insert lots of data (dumpfile is 1GB), hard drive I/O is still a bottleneck (CPU is not busy and hard drive is). Is it possible to force ...
2
votes
2answers
5k views

Is it possible to backup a database that is not ONLINE?

We have a job which backs up all ONLINE databases nightly, but for some reason it didn't back up msdb. So the issue is at that time msdb was in some status was other then 0. So my question is : is it ...
4
votes
2answers
209 views

Problem in Fetching Result set in Desired Format

I have 2 tables having the following columns Person ------ person_id, first_name, middle_name, last_name Items ----- person_item_id, person_id, item_type, status, ordered_date The query is ...
0
votes
1answer
111 views

Compare dates problems

I created a table with the following columns: CREATE TABLE INDICADOR_DADOS ( ID VARCHAR2(10 CHAR) NOT NULL, DATE_START DATE NOT NULL, DATA_END DATE NOT ...
5
votes
1answer
175 views

Many:Many with Shared Relation

I'm modelling data with multiplicity like this: Each Composition/Anthology related pair must share a Composer. Also, each Anthology must contain at least one Composition. How would you recommend I ...
0
votes
1answer
1k views

phpMyAdmin Error After Upgrade to 3.5.8.1

Im Nubie in mysql, I use that only for PHP. to the point, I try to upgrade myphpadmin 3.5.8.1, after I that, I cant accses my database and have error like This: #1064 - You have an error in your ...
4
votes
1answer
75 views

Error statement is not logged, only *password-— with many dashes

I use extended events to store database errors, like this: CREATE EVENT SESSION [ErrorCapture] ON SERVER ADD EVENT sqlserver.error_reported ( ACTION ( sqlserver.client_hostname, ...
3
votes
1answer
71 views

CPU column 5x higher on one machine vs another?

We're running into a strange issue in a deployed version of our product where the performance is just not very good. When we restore a backup of their DB on one of our machines, it performs as we ...
3
votes
1answer
1k views

Service accounts for SQL Server 2012 only allow pre-Windows 2000 name?

I've just set up SQL Server 2012 with domain service accounts. I found that the account name would not validate unless I used the shorter user name. Is there any way of using the full names?
1
vote
1answer
2k views

NLS_TIMESTAMP_FORMAT changing automatically and randomlly

I am using Oracle 11gR2. My nls_timestamp_format is changing randomly from dd-mon-rr to yyyy/mm/dd. Does anyone have any clue why this is happening?
2
votes
2answers
10k views

The multi-part identifier “xxx” could not be bound

The following is a HAVING clause from a small part of a very large stored procedure which I have inherited from some other devs (external); HAVING (SELECT COUNT(*) FROM ( SELECT * FROM ...
0
votes
1answer
97 views

Migration of SQL Server to Oracle Database

In Sql server, My Procedure will create temporary tables where column names are dynamically comes from every user, then inserts the data into the temporary tables and i use the data further based on ...
1
vote
3answers
296 views

DB comparer field by field for all tables

I have a liveDB and I have a development DB. Now when I make a change to development DB, I want to find out the changes later when I am deploying my application on server. For eg. I may have added ...
0
votes
1answer
232 views

How do I selectively purge MySQL table rows using a list of column values?

I am new to databases and working with MySQL. I have a large MySQL table with the following columns: Id, Link, Timestamp. And I have a list of links. I want to keep only the rows with link column ...
1
vote
2answers
4k views

Auto-generate scripts to create tables, indexes, etc

In SSMS, we can right click a database/table/index/... and select the "Script As" option to generate a drop and create script. Is there a way to automate this script generation and drop the scripts ...
2
votes
2answers
3k views

Trying to write a function that doesn't require dbo. prefix

I am trying to write a simple system function so that the dbo. prefix is NOT required to access the function. I have found an example of this for SQL Server 2000 but when I run EXEC SP_CONFIGURE ...
3
votes
1answer
139 views

Why do psql queries take longer when inserting many rows. Why is it non linear

So if I insert a single row into a postgres database it takes 18 ms. If I do this in a loop like this: INSERT INTO contacts (numbers) SELECT distinct array[ (random() * 99999999)::integer, ...
1
vote
1answer
920 views

Watch output of MySQL query over time

I'd like to run a query every few seconds and show the output in a console window. From bash, using watch: watch "mysql -A -pXXXXX -h host -D dbname -u username --vertical -e \"SELECT rowID FROM IDs ...
1
vote
2answers
2k views

Can I find out what version of MySQL from the data files?

I have a very odd situation going on here. I had a linux box running ubuntu 8.10 and MySQL server with a Wordpress installation on it hosting an internal blog for our company. The machine that this ...
1
vote
2answers
437 views

How to avoid lagging when enabling log-slave-updates?

Master: 48GB RAM 16-core my.cnf: https://clbin.com/hlkUo Slave: 64GB RAM 24-core my.cnf: https://clbin.com/viLm0 Both are running 5.5.28. For the incremental backup purpose, I need to enable ...
4
votes
3answers
11k views

How to create a mysql stored procedure through linux terminal

In mysql console we will use the delimiter command to change the delimiter and it is useful to define the procedures. I understood the command delimiter for only the mysql client(client side ...
1
vote
1answer
1k views

Foreign Key to Multicolumn Primary Key?

I have three connected table in my design. Basic logic is when a category deleted, also delete records in category_product table which has deleted category's id in its cat_id column. But when I tried ...
1
vote
1answer
456 views

Oracle Express intermittently stops responding, requiring a OS reboot to fix

I've been having an issue with Oracle XE the past 2 days and it's really been making me pull my hair out. There seems to be no rhyme nor reason why this happens, or when it does, but it happened 6 ...
1
vote
2answers
621 views

Challenge. Split database 500 records in two smaller datasets, randomly

I have a database with 500 records. I want to split these records to 75% and 25% *randomly*in order to use the different datasets for training and testing to machine learning algorithms. Does anyone ...
0
votes
1answer
407 views

Postgres - Schema information within Trigger?

Background : (Multi-tenant design;separate schema per customer, all table structures identical;Data-warehouse / non-OLTP system here; Postgres 9.2.x). Reviewing patterns for the following problem: I ...
11
votes
5answers
2k views

Force sql server to run query conditions as written?

Im using Sql server 2008 R2 And I have this pseudo query (SP) : select ... from ... WHERE @LinkMode IS NULL AND (myColumn IN (...very long time exeted query...)) ... ... The ...
8
votes
1answer
628 views

Normalizing a database without access to source data?

I've started a new role which deals with large amount of related data. Our source of all this data is various Excel dumps pulled from databases we do not have access to. The previous person filling ...
1
vote
1answer
532 views

Trigger not firing when deleting a record from stored procedure MySql

Bare with me, as I'm fairly new to stored procedures / triggers. I have the following Stored Procedure: DELIMITER $$ CREATE DEFINER=`username`@`serveraddress` PROCEDURE `TASK_APPROVE`(IN idtask ...
1
vote
2answers
187 views

Why does this 120 GB insert grow the log by over 780 GB?

A table [tbl_old] has about 3 billion rows and about 120 GB for disk space, and then created a [tbl_new] with the same schema (actually, just dumped the script of [tbl_old], then rename the table name ...
2
votes
1answer
166 views

What are the risks for logging across databases via a trigger?

I've searched for this online and had mixed or unclear responses, and after posting on superuser, was directed over here. On SQL Server 2005, we currently log certain table changes via triggers using ...
2
votes
2answers
80 views

Is there a better way than the ones listed within to join data in an excel spreadsheet to a table in a SQL Server database?

Let's say I'm given a list of names and email addresses in an excel spreadsheet. I am asked to find all customers in the database who's name, and email are in that list. I currently know of two ways ...
0
votes
3answers
195 views

Database Design Confusion

I am making a Phonegap based ERP solution for school in which every school can configure their own school individually and can manage the whole school from that single application, in which a main ...
-2
votes
4answers
2k views

How to load the Adventureworks database into Oracle?

I am trying to work through some of the examples at sqlzoo and I would like to load the example adventureworks example database into an Oracle database at home. Google search has not turned up any ...
1
vote
1answer
8k views

How can we get table name from inside trigger?

I need to pass the table name from trigger to procedure. ALTER TRIGGER [dbo].[Trg_ProjectCreation] ON [dbo].[Projects] AFTER INSERT AS BEGIN SET NOCOUNT ON; -- procedure call ...
2
votes
2answers
221 views

Repeated values in group_concat

I have two tables, first the table food and Second is Activity: INSERT INTO food (`id`, `foodName`) VALUES (1, 'food1'), (2, 'food2'), (3, 'food3'), (4, 'food4'), (5, ...
1
vote
1answer
127 views

SSRS Deployment

I have developed and deploy my reports on report server in LAN. but I want to deploy my reports on report server which is not in LAN. means I need a setup or package which can run at client end ...
0
votes
3answers
868 views

Not getting the expected result with 'IN' and subquery

I am trying to access the ring_to_number from tbl_destinations that holds all the numbers. And field destinations has the comma separated ID like 1,3. but according to this query i just get the the ...
4
votes
1answer
411 views

How to handle “many columns” in OLAP RDBMS

I have a fact that has around 1K different numerical attributes (i.e. columns). I would like to store this in to a column-oriented DB and perform cube analysis on it. I tried to design a star ...
1
vote
1answer
534 views

Join two group_concat result

this is the query: $sql = "select pn.id, pn.purchased_number, pn.plan, pn.ring_to_group, count(rtg.id) as totalGroups, concat_ws(',', group_concat(rtg.group_name), ...
1
vote
4answers
6k views

Database Restore Failed Due to Incompatible Version of SQL Server [duplicate]

I am working on different two SQL Server, I need to transfer database from one server to another but problem is the servers have different versions. Below is image of error message. Using SELECT ...
0
votes
2answers
582 views

Sync Indexes between two tables

I need to automate and Sync only indexes between two tables ( Primary and Stage_Table) within the same database. I tried using SSIS SQL Server Objects Task, but looks like it works only when we sync ...
2
votes
1answer
949 views

Restoring SQL Server 2012 database onto 2008

I am trying to restore a SQL Server 2012 database after I set the compatibility level to SQL Server 2008 by following the instructions as listed on: ...
1
vote
1answer
227 views

OK to put temp tablespace on volatile storage or to omit it from backups? (Postgresql)

I would intuit that it's fine, but I just want to make sure there are no gotchas from a recovery point of view: If I were to lose my temp tablespace upon system crash, would this prevent proper crash ...
1
vote
0answers
162 views

PostgreSQL datasource URL?

My first attempt to use PostgreSQL: I have the elephant icon on the top right: running on port 5432. I want to use LibreOffice as an interface: Connect to an existing database: PostgreSQL ...
4
votes
1answer
285 views

Is there a behavior change between SQL Server 2000 and SQL Server 2008 R2 OPTION (FAST 1)?

This is question 2 of 2 related to the FAST query hint. Background Information (as an aside, I'm not trying to garner more rep, I'm trying to be true to only asking one question per question). Our ...
5
votes
1answer
2k views

How does OPTION (FAST 1) actually interact with a client?

This is question 1 of 2 related to OPTION (FAST 1); We've just upgraded our ERP database from SQL 2000 EE to 2008 R2 EE and we've been noticing increased blocking in the database. I've narrowed it ...
6
votes
1answer
546 views

Are shards distributed randomly across machines in MongoDB or are they in order?

Are shards distributed randomly across machines in MongoDB or are they in order? For example, if I had a MongoDB cluster that was sharded across two machines and my shard key was a person's name, ...

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