1
vote
3answers
295 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
919 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
620 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
626 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
410 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, ...
6
votes
1answer
9k views

UPDATE table based on the same table

I have a table with product descriptions, and each product description has a product_id and a language_id. What I want to do is update all of the fields with a language_id of 2 to be equal to the same ...
2
votes
1answer
947 views

Publishing stored proc execution in transactional replication

In SQL 2008 R2, I am going to update a table which will affect 25 million rows, table is currently replicated (transactional replication). To minimize the impact on replication can I create a stored ...
4
votes
1answer
675 views

Indexes file damaged, was on ramdisk

I have put some of my indexes into a filegroup that contains one file, that file is on the ramdisk, the performance is great, but the problem is that the file was deleted incorrectly (the file ...
1
vote
1answer
61 views

Identical subquery optimisation in an update

update activitybooking set `submitted`='1' where id='958' and (select SUM(pool1_count) from (select pool1_count from `activitybooking` where `abt`='12' and (id='958' or ...
1
vote
1answer
2k views

PostgreSQL stored function that returns arbitrary resultset

I would like to write a PostgreSQL stored function that essentially behaves like the stored procedures I know and love from MSSQL and MySQL where I can just wrap a query that takes no parameters and ...
0
votes
0answers
30 views

Restore SQL Server 2008 R2 Express from Description

When backing up SQL Server we have the opportunity to input a description of the backup. Yet non of the Microsoft tools will show that description for restoring. Is there a way for me to review the ...
2
votes
2answers
3k views

Using dynamic sql inside Oracle stored procedure

Assuming I have the following procedure CREATE PROCEDURE foo (table1_id IN TABLE1.table1_id%type, table1_val IN TABLE1.table1_value%type) AS SQL_UPDATE VARCHAR2(500) := ...
1
vote
0answers
886 views

Asynchronous processing of SQL CLR results that can dynamically add more work [closed]

I have an application that consists of Web-services that make calls to a sharded SQL Server database. Each database node has a SQL CLR stored procedures, which given some number of records to process, ...
1
vote
2answers
609 views

What is the size of currently-existing tmp tables in innodb?

This is yet another "how to add a column to a gigantic table" question. The table on disk takes 2.5GB, and I have around 10GB of ram I can use. I have a feeling I can crank up the tmptablesize option ...
2
votes
1answer
16k views

How to find which tables and views a user has access to?

We have a SQL Server 2008 database and have restricted all tables and views away from a specific user ID. Over the years we have granted back tables and views one at a time based on user need. We ...
2
votes
2answers
2k views

Read Committed Isolation Level

Quote from docs: Read Committed is the default isolation level in PostgreSQL. When a transaction uses this isolation level, a SELECT query (without a FOR UPDATE/SHARE clause) sees only data ...
6
votes
1answer
19k views

Performance difference between MySQL and PostgreSQL for the same schema/queries [closed]

I'm a newbie DBA, and I have experience in Microsoft SQL Server but I want to jump to FLOSS. I'm starting a company, and we develop an app (PHP) with a Postgres backend, and we did some tests ...
-3
votes
1answer
3k views

Difference between accessing SQL Server by instance name and cluster name [closed]

I have installed failover clustering feature on two servers with Windows Server 2012 and then I installed SQL Server 2012 on both of them. I also enabled SQL Server 2012 AlwaysOn feature. Now I can ...
0
votes
2answers
272 views

Teradata performance statistics

I need some statistics regarding the performance of Teradata, something like with a given hardware, given nodes and given AMPs - a table which has thousands of rows can be read in 't' secs. I need ...
8
votes
3answers
908 views

Worse performance on a new server

We've been on a dedicated server (single quad-core, 6 GB RAM) and are moving to a new dedicated server (2x hex-core, 32 GB RAM). Both are Windows Server 2008, SQL Server 2008. The performance on the ...

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