2
votes
3answers
1k views

Why are there different levels of MySQL collation/charsets?

Looking at the MySQL server variables the server and database collation are set to latin1_swedish_ci but the collaction_connection is utf8_general_ci. Additionally, the collation/charset is set at ...
0
votes
2answers
7k views

How to use GROUP BY after the Having clause Mysql

Here is the query which gets the accounts for a specific user the products are related to accounts in one-to-many relation so for each product there are four permissions All the accounts which is not ...
1
vote
2answers
1k views

Which is better: more rows or more columns in a student attendance table?

I want to create an attendance table for student attendance. Which structure should I go for? I have two options. attendance(student_id,date,is_absent,reason) ...
3
votes
1answer
300 views

Deploying database changes in high availability environment

We are currently looking at our deploy process, which consists of an application tier and data tier for a web solution. We'd like to develop a deployment strategy that does not require downtime for ...
1
vote
2answers
257 views

Postgres ODBC driver versions

On the Postgres ODBC driver page the name for each file is of the form: psqlodbc_09_01_0100-x64.zip psqlodbc_09_01_0100.zip psqlodbc_09_01_0100-1.zip psqlodbc_09_01_0200-x64.zip ...
2
votes
1answer
2k views

Do I need to use -f to fix insufficient max server memory settings?

SQL Server Version: SELECT @@VERSION; /* Microsoft SQL Server 2012 - 11.0.2100.60 (X64) Developer Edition (64-bit) on Windows NT 6.1 (Build 7601: Service Pack 1) */ Issue: So, I was playing ...
0
votes
2answers
1k views

Commands like CREATE, GRANT, DROP always return “0 rows affected”

I was considering why some special commands in mysql like create user, grant privileges, drop user when correct passed return "0 rows affected", which is not true! (rows in mysql db are affected ...
6
votes
1answer
25k views

How can I get my linked server working using Windows authentication?

I'm trying to get a linked server to ServerA created on another server, ServerB using "Be made using the login's current security context" in a domain environment. I read that I'd need to have SPNs ...
2
votes
1answer
3k views

MySQL multiple rows with same id meeting two different conditions at same time

I am using OTRS helpdesk ticket management system. When i execute following Query: SELECT `ticket`.`id`, `ticket_history`.`ticket_id`, `ticket_history`.`id`, `ticket_history`.`name`, ...
8
votes
2answers
1k views

What can I add to a server to make SQL restores faster?

I have a 2.8TB SQL database (mostly data files, some 400GB of log files) that currently takes around 9 hours to restore. This database is used for testing purposes and must be deleted and restored ...
5
votes
4answers
54k views

How to write a query to find all tables in a db that have a specific column name

I've got a database with about 100 tables and I need to build a join query to get specific data from two of them. I know one but not the other. Basically I need something like: select ...
17
votes
6answers
5k views

Trying to find the last time that a value has changed

I have a table that has an ID, a value, and a date. There are many IDs, Values, and dates in this table. Records are inserted into this table periodically. The ID will always stay the same but ...
0
votes
1answer
138 views

Create primary keys based upon higher-level entity in access?

Is it possible to have access create primary keys for items by appending a string to the primary key one level above it? I am trying to create an inventory management database for my company's server ...
0
votes
0answers
2k views

Cannot run pgAdmin from the terminal: No such file libwx_gtk2u

(Probably irrelevant) I'm using Puppet to setup/manage a class of computers that are equipped with PostgreSQL and PostGIS, and this implies that each computer goes through an unattended install: ...
3
votes
1answer
1k views

pgAdmin to display multiple result sets

With MS SQL Query Browser I can run multiple queries at the same time and each result set will display in it's own window. Does PostgreSQL/pgAdmin have this functionality? Plugin perhaps?
2
votes
2answers
384 views

How do I maintain more audit history?

I created a SQL Server audit and when I view the audit logs I only see today’s audit. I am saving it to a file and I want to store audit for one year. Is there a way to store database and server audit ...
0
votes
1answer
616 views

Query mail logs for xp_sendmail

Using SQL Server 2008, I can query sysmail_log and other tables to see the results of sql emails. Is anything remotely similar available for querying email logs in SQL Server 2000?
1
vote
0answers
854 views

CSV File Into MYSQL Merging - LOAD DATA on Duplicate Key?

Hey Dba Stack Exchange, My question to you is with regards to mysql. Right now I have a medium to small sized csv with 25k lines I need imported into mysql for a client. Problem is, their is only ...
3
votes
3answers
5k views

Nonclustered index is faster than clustered index?

Both tables have same structure and 19972 rows in each table. for practicing indexing, i created both tables having same structure and created clustered index on persontb(BusinessEntityID) and ...
13
votes
2answers
6k views

Central stored procedure to execute in calling database context

I am working on a customized maintenance solution using the sys.dm_db_index_physical_stats view. I currently have it being referenced from a stored procedure. Now when that stored procedure runs on ...
4
votes
1answer
2k views

How to take partitions or filegroups out of service

I'm an experienced SQL Server DBA but new to partitioning, and I have a couple of questions. Using SQL Server 2008 R2 Enterprise Edition. I've inherited a large customer metrics database that grows ...
1
vote
1answer
2k views

How to change a column type from SET to an ENUM

I have a table with a SET column type that need to be changed to ENUM type. Can I do it with a simple ALTER or will this mess up my data? NB: there are no multiple values (a,b,c) in the table.
0
votes
0answers
36 views

How to add column/alter structure to big table in MySQL [duplicate]

'm php developer so dont be strict. I have a big table ~5.5gb dump. Our PM decided to make new column in it to perform new feature. Table is InnoDB So what i tried: Alter table in screen with table ...
3
votes
4answers
10k views

How to add column to big table in MySQL

I'm php developer so dont be strict. I have a big table ~5.5gb dump. Our PM decided to make new column in it to perform new feature. Table is InnoDB So what i tried: Alter table in screen with table ...
2
votes
4answers
32k views

Create a trigger to update table data on another Server's database

I am creating a trigger in MySQL and I need a little help. I have 2 websites, 2 databases (same name) on 2 different web servers, S1 & S2. These databases have the same tables names. I want ...
8
votes
1answer
788 views

How to make trigger code execute only for a specific application?

I was wondering if it is possible to enable a trigger just for my current application and not for any sql executed against the table. The situation: There are two applications working on the same ...
0
votes
1answer
2k views

MongoDB fast upsert

For non-incremental, but overlapping, imports, I worry about upserts to be very slow and locking the resources for hours. From different sources, I receive 1 json dump per day per source for up to 3 ...
2
votes
1answer
383 views

How big can innodb_doublewrite_file grow?

When I use the enable innodb_doublewrite_file ... How big can this file grow ? How can I calculate the optimal disk size, if it would be used only for this file?
3
votes
2answers
3k views

How to change “tmpdir” on a running MySQL instance

Is there a way to change the tmpdir on a MySQL server without restarting it? The issue is that I use a tmpfs mounted at /var/lib/mysqltmp but sometimes it's overflowing and causes issues. I don't want ...
1
vote
0answers
19 views

How to take partitions or filegroups out of service [migration] [duplicate]

I'm an experienced SQL Server DBA but new to partitioning, and a had a couple of questions. Using SQL Server 2008 R2 Enterprise Edition. I've inherited a large customer metrics database that grows by ...
-1
votes
1answer
123 views

trigger is not working properly [closed]

I have create trigger for some condition but its through error. Here is trigger code. DELIMITER // CREATE TRIGGER `getcrm`.`update_round_date` AFTER UPDATE ON `getcrm`.`vtiger_stockcheckcf` FOR ...
1
vote
2answers
203 views

Which MySQL engine should i use where most operations are read operations

I want to develop an application for which i will need a database to store data. I am using MySQL as backend. My question is Which MySQL engine should i use? Well, i have mentioned some important ...
2
votes
2answers
5k views

To select from all tables inside the schema in PostgreSQL

Is it possible to select from all tables inside the schema? I got all the table names from select table_name from information_schema.tables but I am unable to use it to do my query.
0
votes
1answer
294 views

Error while opening Oracle 11g Database

I have a problem with oracle 11g database, I have shutdown my computer this morning normally, but in the evening when I tried to connect to my database I fond a problem. I cannot connect as normal ...
0
votes
1answer
96 views

Hazards of Upgrading SQL Server Express 2008 to R2

A client of mine reached the 4GB database limit on a SQL Server 2008 Express. As a test I installed the R2 version on another machine and restored a backup of the database. I'd like to upgrade the ...
6
votes
4answers
16k views

Error while restoring a Database from an SQL dump

I am extremely new to MySQL and am running it on Windows. I am trying to restore a Database from a dumpfile in MySQL, but I get the following error: $ >mysql -u root -p -h localhost -D database ...
0
votes
1answer
618 views

Is it possible for heroku postgres follower database to follow non-heroku postgres master?

I am considering to move our site's database from our dedicated db server to heroku postgres. as we have a few gigs of data in the db and don't want to take it down for a long migration downtime it ...
2
votes
3answers
411 views

SSIS Rollback Package

I have several data flow tasks in my package that depend on other data flow tasks. For testing reasons I want to run the entire package and then roll it back after it completes. How do I do it?
7
votes
1answer
1k views

Does Detach/Attach or Offline/Online Clear the Buffer Cache for a Particular Database?

A buddy of mine told me today that instead of bouncing SQL Server, I could simply detach and then re-attach a database and this action would clear the given database's pages and plans from cache. I ...
3
votes
1answer
3k views

MySQL, optimize and replication

I have two MySQL (MariaDB actually) servers, a master and a slave with standard replication. Two times already in less than a month I've had my slave become unusable. This is what I experienced: ...
1
vote
1answer
648 views

MyISAM key buffer

Good evening, I want to know how can I use informations about MyISAM to calculate : size of buffer, size of buffer used, Write ratio, Read ratio, and MyISAM key cache hit rate and thank you.
2
votes
1answer
1k views

Optimizing disk space for MyISAM tables: what is the benefit of ALTER and ANALYZE if you already do OPTIMIZE?

Per this post, in order to optimize the storage of a MyISAM table, you need to: OPTIMIZE TABLE ; ALTER TABLE ENGINE=MyISAM ; ANALYZE TABLE ; It's obvious what OPTIMIZE does for disk space but what ...
0
votes
1answer
185 views

Configure SQL Server Database for High Availability & Warehousing

I have 3 DB servers (DB1, DB2 & DB3 - all on Win 2008 R2 with SQL Standard 2008 R2 in the same datacenter). Let's assume AdventureWorks as an example database. My goal: - Setup DB mirroring with ...
-2
votes
1answer
72 views

Select query using a map [closed]

CREATE TABLE grid_rows( [row_id] [int] NOT NULL, [column_id] [smallint] NOT NULL, [column_val] [decimal](18, 6) NULL ) // (row_id, column_id) is a composite primary query For a given ...
1
vote
1answer
1k views

Can I remove #sql_ .MYD files?

I found some old files in the mysql datadir: -rw-rw---- 1 mysql mysql 0 2012-10-09 09:39 #sql_263c_0.MYD -rw-rw---- 1 mysql mysql 1.0K 2012-10-09 09:39 #sql_263c_0.MYI -rw-rw---- 1 mysql ...
0
votes
1answer
910 views

Is there a system wide way to change MariaDB to create tables using ROW_FORMAT = DYNAMIC

I've got a 700MB dump file from a mysql database that I was trying to undump into a new install of MariaDB and I got this error ERROR 1118 (42000) at line 7481: Row size too large (> 8126). ...
7
votes
1answer
1k views

Index usage stats DMV indicates no index activity

I'm trying to obtain information on indexes. According to several websites, the below TSQL query should join information on indexes to the indexes table, returning indexes and related information. ...
0
votes
1answer
49 views

Mview replication

We are setting up a large scale replicated environment and would like to know if there is a way to skip certain dml for eg. deletes during data trasfer with simple mview replication. Also, is it ...
2
votes
2answers
3k views

How to set password for PostgreSQL database with a script?

In a bash script I'm writing, I need to create a database and set a password that is generated automatically by my script. The problem is I can't find a way to set up the password without user ...
0
votes
0answers
54 views

Federate engine to help overcome distributed transaction?

Currently we have been using pure innodb. The issue is that we have architecture where we have multiple outlet each have its own local db and a copy of it in the hq outlet. The issue is that we ...

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