1
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1answer
25 views

Indexed varchar column efficiency

On a table with several million rows, with an index on the only column in the where clause (varchar 100, full length indexed), would there be performance gains in making sure that the differences ...
1
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0answers
120 views

Storing table history - is this a good use case for Postgres's table partitioning / inheritance?

I currently have a products table which stores product information (title, description, tags, manufacturer, etc.) for a website. I would like to store historical information of changes to this table ...
1
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1answer
28 views

Updating databases that user's can manipulate

I have a product that includes a MySQL database with some defined countries (very few, not all of them). The user has some control over this table - they can add / edit / delete countries. When we ...
1
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0answers
132 views

PostgreSQL 9.0 live migration/replication with native/bucardo between multiple architectures

I'm writing here because I'm in desperate need of a stable and good solution for resolving a issue we are facing. We have an old PostgreSQL server running on RHEL 4 i386 with PostgreSQL 9.0 ...
1
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2answers
259 views

How to add a column from another table?

I'm starting to using SQL statements in my Oracle database XE (tables and relations made by me) and I'm having a hard time to understand how can I put a column from another table. The example in ...
1
vote
2answers
69 views

professional services (consultants) resource allocation system

I am developing a resource allocation system using PHP and mysql. I have consultants and projects and I need to allocate the consultants on to various projects for various periods of time on various ...
1
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0answers
204 views

How to create index on a postgres table as fast as possible?

I have a large database import (100GB) on a postgres table without indexes. After the import I want to create the index for the queries as fast as possible. No data is accessed on the table as long as ...
1
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0answers
57 views

Restricting SQL Server access for Azure

I have SQL Server 2008 R2 running on a dedicated server together with a web site hosted on that same server. We now wish to access the SQL Server databases from an Azure Web API, however for security ...
1
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0answers
303 views

Using SESSION sql_mode = 'NO_BACKSLASH_ESCAPES' before running query to remove backslashes in database

See this post: How do I remove backslashes from records in MySQL I have similar issues in that code that was developed before me did not use strip slashes with magic_quotes_gpc on before inserting ...
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0answers
41 views

A design pattern for category features [closed]

I work for a system which has these tables: products , categories , features User wants to add some feature like color dynamically. Which of this following ways are true? First one: Product ...
1
vote
1answer
598 views

Error when trying to access linked server from another machine

I have created a linked server from a Excel source and when I query or test the connection from the locally from the server everything is good but if I try the same from another machine with DBMS I ...
1
vote
1answer
48 views

MySQL GTID replication: is it possible to make DDL changes to a slave and then catch it up to a master?

Here's what I would like to do: 1. hang a slave off my production master. 2. stop replication 3. adjust some data types and create some indexes on the slave (no data mods) 4. restart replication 5. ...
1
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0answers
161 views

How to improve performance when joining against coalesce

In an effort to remove a caching layer from our application, I'm building a number of views to encapsulate the different ways a user can have access to a piece of content - one per "rule" of access. ...
1
vote
0answers
218 views

Most effective way to manage a growing list of time series data in an MS Access database

I am building a database to store time series data along with some other summary statistics. Since this is a local application I do not have access to more robust database solutions and am confined to ...
1
vote
1answer
112 views

ER Diagram - View Intergration/Centralised approach

Could anyone enlighten me on the difference between a view integration and centralised approach when designing a database, and how the ER diagram can be used to illustrate upon this; can't seem to ...
1
vote
1answer
144 views

Write-lock a whole table during transaction

I need to perform a delicate operation to my table in which I will solely insert, delete and select upon all of my rows and no God may interfere with the table during this operation: the table will be ...
1
vote
1answer
34 views

Search functionality using joins

I have three tables as mentioned below. I need to implement basic search functionality where the user will search for a keyword which could either match 'title' (from Proposal table) or 'msNumber' or ...
1
vote
0answers
57 views

Unsafe statement written to the binary log using statement format

In MySQL error log I am getting this warning message: [Warning] Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT. Statement is unsafe because it ...
1
vote
0answers
362 views

Most efficient way to bulk insert or upsert data into multiple related tables

Given a PostgreSQL 9.4 schema with 3 related tables: CREATE TABLE a ( id BIGSERIAL PRIMARY KEY, a_name VARCHAR(80), a_field INTEGER ); CREATE TABLE b ( id BIGSERIAL PRIMARY KEY, b_name ...
1
vote
0answers
57 views

Performance impact in orders of magnitude with Dynamic SQL [closed]

This started as a problem debugging a SSRS performance problem where I found reports were timing out when they previously weren't. Finally I traced down the SQL the report server was submitting, and ...
1
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0answers
62 views

Log large queries with PGbouncer

Is there a way to ask pgbouncer to log any query that generates a result set larger than, say, 5MB?
1
vote
0answers
343 views

SQL Server 2005 Cluster Service pack 4 upgrade failure at remote user account

I built SQL Server 2005 ENT Cluster on Windows Server 2008 R2. I need to upgrade it to SQL Server 2005 SP4. However, I get this error at the Remote User Account screen Enter the remote user ...
1
vote
2answers
35 views

removing sql logins from one server, after migrating to another server, but all the databases were not migra

Here are the details of the production environment: I have 2 serevrs, A1 and A2. I have completely transfered 100 logins from server A1 to A2. Server A1 contains 5 DATABASES. But I moved only 2 ...
1
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1answer
53 views

I really can't get rid of these conditional statements in mysqldump?

My mysqldump DDL file is filled with tons of this: /*!50003 CREATE*/ /*!50017 DEFINER=`root`@`localhost`*/ /*!50003 TRIGGER `my_trigger`... I've searched to no avail for an option to silence this. ...
1
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0answers
516 views

Creating Pandas DataFrame on Python From a MongoDB Document containing Embedded documents

I am working on a machine learning algorithm on python's scikit.learn, but this time the data are in Mongodb documents format. I would like to pull my data into a dataframe. Here is an exemple of the ...
1
vote
1answer
61 views

What should we do when same column fields occurring multiple time in many tables?

I have more than 20 tables in my database. There are some columns which occur in almost all of the tables. In that case what should I do? Do I put all those columns in every table or is there a better ...
1
vote
0answers
236 views

how to disable and enable SSIS package using commandline?

I have a scenario where SSIS packages are deployed at the customer's site and they have some data issues. Because of this we are developing new packages to fix the corrupted data. When my new ...
1
vote
0answers
27 views

How to move a specific Postgres database to different harddrive?

I have my postgres db running on harddrive d:\, and also all the tables are placed there by default. Now I want a specific table to be save to a different drive (say f:\). The table is not yet ...
1
vote
0answers
56 views

MySQL performance of trigger when many rows are affected

I have a question on MySQL triggers which I hope someone might be able to help with. As part of our platform, we have a table (accounting), which grows rapidly. We also have an archived version of ...
1
vote
0answers
74 views

Getting count of visits for multiple different outlets

I'm trying to get the distinct count of id that visited different outlets. I have more than 50 outlets so I don't think I can use the IN operator. CREATE TABLE transact ( year int NOT NULL, card_id ...
1
vote
0answers
53 views

Create Nested XML in a Sql Server Indexed (Materialized) View

This page https://msdn.microsoft.com/en-us/library/ms188276.aspx indicates that if you wanted nested XML (ie an XML Tree) then you need to setup your query like this: SELECT Col1, Col2, ...
1
vote
1answer
112 views

MySQL Brute Force Defense

I was wondering what defense MySQL server uses to protect against brute force attacks on the user credentials? I hope this isn't too simple of a question! I have tried to Google it, but can't seem to ...
1
vote
0answers
20 views

Does the consistency part of the CAP theorem apply to updates and not first-time writes?

Using this definition of the CAP theorem: Consistency All database clients see the same data, even with concurrent updates. Availability All database clients are able to access some version ...
1
vote
0answers
1k views

How do I cast a varchar to Bigint in DB2

I have a field which is varchar(25) and I need to create a join between that field and a field that is a bigint So I guess I need to convert the field into bigint aswell but it's giving me some ...
1
vote
1answer
34 views

Speed up procedure

I was wondering if this procedure can be executed faster. There are indexes on the joins and where's. Depeding on the size of product_id_CSV it takes approx. 2.5 sec. CREATE ...
1
vote
0answers
23 views

How to make an indexed search over a list (set)?

A follow-up question for How to most efficiently store possible combinations of categories? An answer pointed to SET datatype. As far as I know, the default search option for it, FIND_IN_SET, doesn't ...
1
vote
1answer
46 views

Manage max table storage space in case of excess data (size in GB)

My scenario is that I am using sql server 2008 r2 on my end. I have created a database named testDB. I have a lot of tables with some log tables in this. some tables have contain lakhs of records in ...
1
vote
0answers
34 views

Which method would be more secure and feasible in the long term?

The concern here is a confusion between two alternative methods for storing data. Our product migrates records from any service A to any service B. These services define their own records and the ...
1
vote
0answers
68 views

PostgreSQL DB freezes with large inserts

I am developing a web application with an SQLAlchemy ORM linked with PostgreSQL database backend. I have this usecase where a client uploads a file of about 20 MB containing large data. What I am ...
1
vote
0answers
69 views

PostgreSQL security threats in external modules or PL languages

In reading the answer to question I came across a paragraph that indicated that some PostgreSQL PL languages and/or contrib modules can be used to compromise the security of the system. Is this only ...
1
vote
0answers
62 views

MySQL Cluster 7.4.6 - Analyze table failure on 15m reference table

I'm running MySQL Cluster 7.4.6 on Azure VM's with the following infrastructure: 2 x Mgmt Nodes: Ubuntu 14.10LTS, 2 cores, 3.5GB ram 2 x MySQL API Nodes: Ubuntu 14.10LTS, 2 cores, 3.5GB ram 2 x Data ...
1
vote
0answers
79 views

Does psql print command results to standard error?

I am running COPY command through psql 9.1.15 as a cronjob to append data in csv file to table1: psql -q -h $DB_HOST -d $DB_NAME -p $DB_PORT -U $DB_USER <<EOF copy table1 from ...
1
vote
1answer
109 views

How do I optimise XPath Querying over a large dataset?

I have a table that has 220 M rows. Also the table has a xml column that has XML data. I have configured single file for data and another ndf for index. Table's primary key is guid column. When am ...
1
vote
2answers
306 views

Need to make MySQL's LOAD DATA LOCAL INFILE load large data faster

I need to load 4 million rows of data into a MySQL InnoDB table using LOAD DATA INFILE and would like to know if there are server configuration options I can tweak to get faster load. It took me 15 ...
1
vote
0answers
175 views

Optimizing a geo search in Postgres

I'm searching for UK postcodes within a radius of a given postcode. The query that I'm using looks like this: SELECT *, earth_distance(ll_to_earth( {$lat}, {$lon} ), ll_to_earth(lat, lng)) as ...
1
vote
0answers
56 views

Explain unexpected result in MATCH () AGAINST ()

I have a database with a fulltext column name. I made a query SELECT name, MATCH (name) AGAINST ('breaking bad') AS score FROM files WHERE MATCH (name) AGAINST ('breaking bad'); So that I can see ...
1
vote
1answer
211 views

percona cluster 5.6 - handshake with remote endpoint failed, but endpoint is not part of config

I set up a cluster of 3 database nodes using a percona 5.6 cluster. Everything works, all nodes are replicated. I configured SSL for state transfer. The cluster recently changed its topography, ...
1
vote
1answer
266 views

Can't connect to EC2 Postgresql instance unless I change the default port 5432 [closed]

I just created a brand new EC2 instance with a default security group allowing All Traffic from Anywhere. My listen_address is set to * I can SSH to it but I can't connect to the pgsql instance ...
1
vote
0answers
299 views

Distributed Replay DCOM issue

I have 2 SQL Servers in a Domain. Windows Firewall is disabled on both servers and there is no hardware firewall. Both servers are in the same subnet. One server, called Controller is configured as a ...
1
vote
0answers
144 views

debugging PostgreSQL serialization failures

I am trying to migrate our PostgreSQL 9.4 database from transaction level READ COMMITTED to either REPEATABLE READ or SERIALIZABLE. In either case, I'm exposed to a new set of errors with the format: ...

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