1
vote
1answer
1k views

mysqlbinlog failing with “ ERROR 1032 (HY000) at line 48: Can't find record in `` ” Error

I am facing some issue with PITR restore using mysqlbinlog . It is failing with the following error . # mysqlbinlog mysql-bin.000035 | mysql -u root -p db Enter password: ERROR 1032 (HY000) at ...
1
vote
0answers
299 views

SQL command in stored procedure continue on error

To perform Checkdb on all database of server i am using a stored procedure which loops over a view which contains list of databases in server and the stored procedure performs checkdb on all databases ...
2
votes
1answer
1k views

creating PKs for existing tables - altering column constraints

I am quite new to DB2, so I googled around how to ask questions correctly and so I hope I can provide all necessary information. I have an existing table A1230922.CALSONW with several (195) columns ...
0
votes
1answer
1k views

Connect to Mongo Shell on OpenShift

I have a gear running a instance of mongoDB. I wish to connect to the mongo shell. How can I do it? I have rhc and mongoDB installed on my computer. I have RockMongo on the gear, but I cannot create ...
0
votes
1answer
4k views

How index work in oracle? [duplicate]

I want to understand : How index work in oracle. How they are stored in the disk. How they increase the efficiency of a query? By third point I means how Index contribute to the efficiency of ...
0
votes
0answers
32 views

Changed password on Postgres but I still can log in with the old one [closed]

I changed my password via alter user, but can still log in with the old one. In the 9.1.6 version of postgresql I resolved this problem by killing all the processes through pg_terminate_backend, but ...
1
vote
0answers
98 views

WMI event alerts

I am trying to understand WMI event alerts and have implemented a mirror with alerts on DATABASE_MIRRORING_STATE_CHANGE such that all database failover if the state is either 7 or 8 (manual failover ...
1
vote
1answer
72 views

Designing a fragmentation database? [closed]

I did some research about distributed databases, but I still have some questions. I understand there is something called "fragmentation database" but I can't find any help full document for ...
-1
votes
2answers
519 views

MySQL: how to copy a database from one server to another without export / import

I have access on two different Windows systems. There is one MySQL database on one system which I want to copy to another system. Please note that I haven't username and password for DB access on the ...
0
votes
1answer
48 views

MongoDB Balancer:move data inside replication set or across replication set?

After reading the document of mongodb on the balancer topic , I have two questions: 1.If I set Balancer on , will the db operation efficiency will be influenced ? 2.Still ,I cannot understand ...
3
votes
1answer
401 views

2 B-tree indices OR 1 GiST index on tsrange — which will perform better?

I have a table which is storing reservation data using the columns starts_at & ends_at Whenever I'm querying the table to find overlapping reservations, I have an option of using one of the ...
0
votes
2answers
207 views

Separating a date column in Access into Month, Day and Year while keeping the new columns ordered by a seperate column(primary key)

I have a column titled DateOpen which lists the date files were opened in d/m/yyyy format. I want to split the entries in that column into new columns titled MonthOpen, DayOpen and YearOpen while ...
1
vote
2answers
310 views

MySQL replication: slave not updated

This has been asked many times over but we really cannot get a simple Master-Slave Mysql (5.5.25) replication to work for our two dbs (FatTree and Torus). And no trace of error in the logs. The ...
0
votes
1answer
436 views

DB2 - Archive mode - large number of logs in logarchmeth1 folder

maybe for someone this is begginner's questions. I read lot of documentation and set: `LOGPRIMARY 6 LOGSECOND 4 LOGFILSIZ 4096 logarchmeth1 Disk - C:\archive logpath C:\active` Number of logs ...
2
votes
2answers
11k views

How can I dynamically alias columns?

I have a table (not designed by me) which has 20 variably named columns. That is, depending on what type of record you are looking at, the applicable name of the column can change. The possible ...
1
vote
1answer
35 views

Do shorter names exist for “one-to-many”, “one-to-one”, “many-to-many” relationships?

In terms of generic variable naming or even everyday geek discussion, do shorter and "cleaner" terms exist for one-to-one, one-to-many, and many-to-many relationships. For example, in discussion of ...
3
votes
1answer
384 views

Most efficient queries on flags in TSQL: bit field or table join?

Looking for the most efficient database structure for selecting rows from a large table based on one or more true/false values. For example, whether or not a user has opted in to marketing ...
0
votes
1answer
105 views

SQL Server database recovery

By mistake one of my colleague in the office has restored .mdf and .ldf files of another database to production with existing database name. So existing database was overwritten with new backup. Is ...
0
votes
2answers
91 views

How to store a database table in multiple disks with assigned ratio?

I am going to deploy database tables to multiple disks. My database layout would be like following example: There are 3 tables (Customer, Order, Product) and 4 disks (disk_A, B, C, D). Customer: 5% ...
3
votes
1answer
354 views

With SQL transactional replication, does changing user permissions to a table trigger a new snapshot?

I was hoping to get some help with a SQL Server 2012 transactional replication scenario - or maybe just my understanding of where permissions are stored in SQL server. If I change a users permissions ...
1
vote
1answer
196 views

Elasticsearch: Versioning a document on revisions

I currently have a document which gets revised regularly, I want to keep track of the document by keeping each old version of the document. So if document A has a summary and update date I want to, ...
3
votes
4answers
9k views

Changing IP address of SQL Server 2008 R2

I would like to know if there are any dangers or relevant precautions before changing the IP address of a SQL Server 2008 R2 box. We have a built a virtual PC with Windows Server 2008 R2 and SQL ...
1
vote
1answer
356 views

Error while importing sql - Specified key was too long; max key length is 1000 bytes

I am trying to import an sql file which shows me the following error: Error SQL query: -- -------------------------------------------------------- -- -- Table structure for table `users` -- CREATE ...
1
vote
0answers
87 views

SQL Server replication - recommendations for stability

We have two SQL Server 2008R2 Standard servers, and we've set up replication of a single database between them. The replication is about as simple as it can get - it's a transactional replication from ...
0
votes
1answer
376 views

Installing Oracle 11g on Windows SBS 2011 64 bit

In the Oracle web site, I found the following requirements: http://docs.oracle.com/cd/B28359_01/install.111/b32006/reqs.htm#CHDHGGFE Oracle Database for x64 Windows is supported on the following ...
2
votes
1answer
308 views

mysql query doesn't work inside a stored procedure

this is my stored procedure: CREATE DEFINER=`root`@`localhost` PROCEDURE `isUserValid`(IN `facebookId` VARCHAR(20), IN `userAccessToken` TEXT) NO SQL COMMENT 'check if user is valid. return ...
1
vote
1answer
6k views

query to search a particular word/string in toad/oracle

I trying to find out a word/string named 'audapro_ind' in oracle database in toad. This word can be present anywhere in column of table, function, procedure etc. in oracle database I tried few ...
2
votes
2answers
3k views

Best practice to avoid a composite key?

Suppose my students fill every year a survey, containing some questions (called fields) which answer is real-valued (called value). Every student may answer the survey, at most once a year. A simple ...
0
votes
1answer
26 views

Continuous jobs on Redis [closed]

I want to setup a script that sums up a bunch of values in a list and then puts down the result in total-count and then removes the entire list, And this all should be repeated once a minute or as ...
1
vote
1answer
1k views

How to know spid which is filling tempdb from temp table name in sybase

I received alert that tempdb is going to be full and temp table name aslo provided. Now I want to know how to check which spid is filling tempdb from temp tablename.
0
votes
2answers
62 views

Full Transaction Log on closed source system [duplicate]

I have a closed source application which has the transaction log filling up on a daily basis to 60+gigs. I have ran a trace on the database and no inserts and updates are occurring. The following ...
3
votes
2answers
2k views

What is a valid use case for using TIMESTAMP WITHOUT TIMEZONE

There is a long and quite elucidating answer on the differences between TIMESTAMP WITH TIMEZONE -vs- TIMESTAMP WITHOUT TIMEZONE available in this SO post. What I would like to know is: are there ...
1
vote
1answer
186 views

Using “Generate Scripts” with EMERGENCY/SINGLE USER mode

I am trying to create an INSERT script to salvage data from a single table in a corrupt database. I've succesfully put the database online and put it in EMERGENCY / SINGLE USER mode (following this ...
1
vote
1answer
85 views

How to relate 2 user profile tables to a single login table?

I have an Employee table , and another table named Student. Now I have a third table named the Login. Employee has emp_id as PK , and other specific attributes for an employee. Student has std_id as ...
0
votes
3answers
264 views

MySQL “lost” all data(InnoBD)

Today I was making some work with site and I get error what MySQL can't rename file (to make changes in BD). Next I tried to restart MySQL, and it failed to stop MySQL. Then I did go to /var/lib/mysql ...
-1
votes
1answer
34 views

Grouped Data tracking [closed]

I have a MS Access Database that tracks clients, client regions and transaction types. Users are keying in transactions and once done, the system needs to create letters to the client regions ...
1
vote
1answer
716 views

DB2 - Archive Mode - on what values to set LOGPRIMARY,LOGSECOND,LOGFILSIZ?

we must set our database from CIRCULAR to ARCHIVE mode in order to enable ONLINE backups. Backups will be done every 1 day. Database is now almost 30GB. Database grows approximately 1GB per month. ...
2
votes
2answers
159 views

Most performant way to fetch last record

I have a Postgres table Prices with the columns price (Decimal) product_id (Int) Prices get updated regularly and I keep old prices in the table. For a given product, the last price in the table ...
5
votes
1answer
52 views

Is it possible to decouple row size estimation from maximum column width?

In other words, is it possible to declare a column VARCHAR(n) and have the estimated size be something other than n/2? An example use-case might be storing URLs - you expect most to be relative and ...
2
votes
1answer
413 views

MyISAM with Innodb in the same Wordpress database reduce performace?

My new Wordpress database all the Wordpress created tables use InnoDB engine and plugin created table use MyISAM. But older site database all the tables use MyISAM table engine. I use MySQL ...
0
votes
1answer
617 views

INSERT take too much time

I have in my MySQL DB a few tables Most of the time, I'm only doing INSERT in my db. I have up to 4 connections to the DB, each one inserting into a different table. There cannot be two connections ...
3
votes
1answer
80 views

What inefficiency does sharding & partitioning attempt to address? [closed]

I have never implemented sharding or partitioning, but from what I understand, multiple servers are used to distribute large amounts of data. Is this because of a limited hardware budget or to ...
1
vote
0answers
825 views

PostgreSQL problems on Ubuntu 12.04

I'm having terrible problems with PostgreSQL initialization on my VPS. I followed several tutorials on this topic and nothing made my database server work. I followed these steps: sudo apt-get ...
0
votes
1answer
227 views

Where can I get best resources to learn sql? [duplicate]

I am very new to the databases just have basic knowledge about it. I want to learn sql language and dont know where to start. Please help me to start with it. And what is the difference between ...
1
vote
2answers
101 views

Backup architecture for frequent backups of business critical DB

We've got a database (mysql) driven application which contains business critical information, were looking at building a system that will allow us to backup the db frequently (every 15 minutes, ...
1
vote
1answer
122 views

Mongo db and sharding / replica sets concept questions

I have few questions about sharding and replica sets: I am planning to write important logs to a sharded environment. about 100 million rows in a day, If I will connect to a single MONGOS process , ...
1
vote
2answers
43 views

Multiple “model” DBs — or db creation 'profiles'

I know you can't actually have multiple 'model' DBs on the same server instance. BUT, I'd like to have something almost like it. Basically, we have a business model where each customer is its own DB, ...
4
votes
1answer
131 views

redundant foreign keys in PostgreSQL - are there any indexing benefits?

Note: this is not the same as this SO question which is about adding redundant information in the tables themselves. Does the final statement in the below series of statements buy me anything in ...
3
votes
1answer
161 views

Enforcing constraints “two tables away”

I ran into some trouble modeling an electrical schematic in SQL. The structure I'd like to capture is part ←────────── pin ↑ ↑ part_inst ←───── pin_inst where "inst" is short ...
1
vote
1answer
58 views

What problem prevents well defined behavior of a foreign key on a non-unique column?

In my noob opinion, it strikes me that in a serialized environment, this shouldn't be a problem. Is that correct? If not, please explain to me why a foreign key's behavior on a non-unique column is ...

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