5
votes
4answers
56k 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 <tables>...
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
139 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
3k 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
395 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
630 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?
2
votes
0answers
875 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 ...
14
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 ...
5
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
33k 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
793 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
390 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
20 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
126 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
208 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
300 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
17k 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
632 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
415 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
665 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
2k 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
919 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 ...
3
votes
1answer
8k views

How to create a table in MySQL with automatic numeration of columns?

Example. My data is from Table name:BIKE Bike_No Repair_Date Repair_Cost -------- ----------- ------------ ABC1234 2013-01-05 50.00 BMX5678 2013-02-04 75.00 ABC1234 2013-01-...
2
votes
3answers
465 views

Database design for conditional detail table

I have an expense management system for monthly expenses. Expenses are of two types: one-time monthly expenses, and daily expenses for each day of month. I have created the following tables: ...
1
vote
3answers
174 views

About changing data path by database

Is there any way to change physical path by database? For example : I have 2 databases in server. database1 will be located in /data/database1/ database2 will be located in /data/database2/ Is ...
1
vote
1answer
980 views

Using a mysqldump export to create data with a different database name

I am using the following to import database using a mysqldump export: mysql -u root -p example_db < path/to/export.sql I would like to import the database to a database with a different name to ...
0
votes
1answer
645 views

Simplify subqueries with join

I'm trying to create a report in SQL Server Reporting Services that shows the availability of multiple sites. The sites are monitored by a tool that uses a SQL Server 2012 database to store the data. ...
0
votes
1answer
268 views

how important are mysql's innodb logs?

I'm basically concerned about the following two settings, these are my default settings : innodb_log_buffer_size 1048576 innodb_log_file_size 5242880 I haven't changed them for 2 reasons : one, ...
1
vote
1answer
3k views

PowerShell based SQL script execution [closed]

I am new to powershell. Even I dont think I know the basics..But now I am assigned a work to do the execution of sql scripts residing in a remote server. 1) we have to connect to that particular ...
1
vote
0answers
480 views

How to delete orphaned records from sysmergesubscriptions table?

I have some old orphaned records for old subscriptions that I want to delete from the sysmergesubscriptions table. Each time I delete unnecessary records, it show up again after it syncs with any ...
0
votes
1answer
354 views

Mysql slow.log user specific

I use a slow.log logging on my MySQL server, to catch bottlenecks in my script, but at the same time, i use phpmyadmin on this server. My script and pma has different MySQL user accounts and now, when ...
3
votes
1answer
5k views

How much time will a vacuum/autovacuum operation take?

I manage a big (some hundreds of gigs) database containing tables with various roles, some of them holding millions of records. Some tables only receive large number of inserts and deletes, some other ...

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