0
votes
0answers
4 views

MySQL read/write ratio from information_schema.GLOBAL_STATUS

Could you please help me to construct a query to sum specific rows from a table, basically desired output is: +-----------------+----------------+ | Total reads | Total writes | ...
0
votes
1answer
10 views

How to find n consecutive numbers in MySql

I have numbers starting from 1 to 50 and then 90 to 200 in my database and I want to fetch 100 consecutive numbers then the result should be 90 to 189. Records in my table are more than 10 million.
0
votes
1answer
17 views

SQL 2008 Server - performance loss possibly connected with a very large table

Migrated from http://serverfault.com/questions/615129/sql-2008-server-performance-loss-possibly-connected-with-a-very-large-table We have SQL Server 2008 with 3 active databases running on it. DB1 ...
0
votes
1answer
12 views

Extracting the maximum of several subsets and join all maximums in a new table

I have a big table: What I need is to obtain the maximum value for each testname, with different entry and get a new table such as: And then I want to compute the maximum, the minimum and the ...
1
vote
0answers
12 views

Should one always VACUUM ANALYZE before REINDEXing in PostgreSQL 8.4?

Early in the morning every day a pgAgent job refreshes the contents of table A from table B on my PostgreSQL 8.4 database. Table A contains around 140k records across 91 columns and has two indexes - ...
1
vote
2answers
21 views

Optimize rows to columns conversion

I have a big Oracle table (around 40 million rows) that looks like this: ID Name Question Answer Reason 3 Name1 1 Yes blah blah 3 Name1 2 No NA 3 Name1 3 ...
0
votes
1answer
10 views

It is mandatory to create a route when creating an event notification?

I'm starting with service broker. Already managed to setup an event notification for blocked processes based on this answer and it's working flawlessly. Then I wanted to setup another one to notify ...
0
votes
0answers
14 views

It shows error in “WHERE pk.remarks = 'free'” can you give me any suggestion?

CREATE VIEW viewinstallinfo AS SELECT i.installid, i.customerid, i.username, iu.internetpassword, i.installdate, i.installmiti, i.billdate, i.billmiti, i.entrydate, i.entrymiti, i.billno, ...
0
votes
1answer
18 views

Why is my Mysql Query verry slow when selecting a text field

i have a problem with a left join. Tables are myisam. Tables CREATE TABLE `article` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `force_startpage` tinyint(1) DEFAULT '0', `title` varchar(255) ...
0
votes
0answers
12 views

amazon small instance mysql query too slow

I have mysql database with 1.5 millions records with 2 million categories records. when i do query on categories and city where clause it takes 304989 milliseconds. on localhost it too fast. i tried ...
2
votes
1answer
22 views

difference between index REBUILD and REORGANIZE in relation to recompile in SQL Server 2008 R2

Does the INDEX REORGANIZE index cause recompilation of the stored procs the same way as INDEX REBUILD
0
votes
1answer
11 views

pt-table-sync for 3 master servers

We had a mysql multi master with 3 nodes and unfortunately the replication broke. We have some set of tables which has to be in sync with other database servers, so i was looking into Percona-Toolkit ...
0
votes
0answers
9 views

Custom personal monitor sql by writing the .psqlrc file

I want to custom my personaly monitor sql by writing the .psqlrc file , but I encounter some problems . --tablespace skypcsuit=> \db List of tablespaces Name ...
0
votes
0answers
5 views

The OLE DB provider “Microsoft.Jet.OLEDB.4.0” has not been registered

I am getting the error as follows : The OLE DB provider "Microsoft.Jet.OLEDB.4.0" has not been registered. I try it on google .I have install AccessDatabaseEngine.exe but no use it is used for 64 ...
1
vote
0answers
16 views

Implementing application locks within SQL Server (Distributed Locking Pattern)

In my application I have to perform a distributed locking pattern. Because we already have an instance of SQL Server to use, we decided that it would be easiest to implement the locking at SQL layer ...
0
votes
3answers
39 views

How to display posted on date and time like1 hr ago or 30 min ago

i want to show the posted date like 1 hr ago.. or 30 min ago.. declare @date datetime ='2014-07-24 11:50:22.033'; SELECT CASE WHEN DATEPART(DD,@date)=DATEPART(DD,GETDATE()) THEN CASE WHEN ...
1
vote
0answers
12 views

Merge/combine two queries with different dates

I have one query that runs a SUM statement based on daterange 1, and worked fine, and another query that run same SUM statement, but on a different date range. I would like to merge/combine the two ...
1
vote
1answer
15 views

MySQL crashes frequently on a Windows server

I have been facing an issue with MySQL crashes since last week. I don't know what exactly is happening. When I look at the Windows logs, I see the following error message: Faulting application name: ...
0
votes
1answer
23 views

Query to join three tables

I have three tables which I have to join. I'm not a good SQL writer. Can please sombody help me to prepare this using joins: branches ----------------------------------------- branch_id | branch_name ...
0
votes
1answer
13 views

SQL Server NULL values UNDO

I mistakenly updated the null values in my table to a string similar to an already present string. For e.g. I changed the NULL values to 'WL:5' and there were records for 'WL:5' already present. I ...
0
votes
0answers
15 views

MySQL Dump failure in the middle

I have a several GB's of MySQL datas,I want to dump those files,As when I tried to dump,it fails in between. It is impossible to start over the process again,Is there any way to start the dump from ...
0
votes
0answers
9 views

Mongo sharding issue with chunk split and Data transfer

I am getting this error in my primary shard warning: moveChunk failed to engage TO-shard in the data transfer: still waiting for a previous migrates data to get cleaned, can't accept new chunks, num ...
0
votes
0answers
14 views

Randomizing the Auto Increment in Mysql

We have a database, where we insert data into table whenever we receive an order from our services. We use auto_increment to generate the ID and assign the order with the same. This is usually same ...
0
votes
3answers
43 views

Matching two rows in a single table if two specific keys have different values

I have a table called settings in that there are two columns and data like following. settings value ------- ------ depots 12 projectid 156 client ...
0
votes
1answer
16 views

Duplicate Entry Error with PHP When Trying UPDATE

I am checking if a record exists, creating a new record if it does not already exist, and updating otherwise. The SQL works fine in PHPMyAdmin but not through the PHP page. $check_for_id = ...
0
votes
0answers
2 views

Why mongo write only one partition

The /dev/mapper/vg_db1-lv_root partition used 100%,but the other partition is free,why mongodb store data only use this partition. This is why? How can I solve this problem? [root@db1 shard11]# df ...
0
votes
1answer
17 views

Copying a table in SQL Server database to Oracle database

I am new to database management. I need to copy a particular table "Attendance" in SQL Server database to Oracle database. There is no connection between the two databases. Also, "Attendance" is ...
0
votes
0answers
6 views

Continue a command on the remote MySQL server when I exit local MySQL workbench?

I'm issuing a DROP TABLE command that is taking a very long time. If I close down my local MySQL Workbench, will the command still be running and finish on the remote server? If it doesn't, is there ...
0
votes
1answer
6 views

Workload Groups in SQL Server 2012

I have been looking for an answer about "Workload Groups" in SQL Server? What exactly it is Workload Groups? Could you explicit a real world situation when this term is used? Thanks in advance ...
0
votes
0answers
18 views

SQL Server 2014 Install Not Creating Default Instance [duplicate]

I am trying to install SQL Server 2014. The problem that I am having is that during the installation it is not letting my choose whether I want to use a default or a named instance. I have been ...
0
votes
0answers
22 views

error in identifying a control file

SQL> startup mount ORACLE instance started. Total System Global Area 1068937216 bytes Fixed Size 2233344 bytes Variable Size 616565760 bytes Database Buffers 444596224 bytes ...
0
votes
1answer
47 views

Why is my select statement so slow?

SELECT name FROM sys.databases WHERE name not in ('master','model','msdb','tempdb','ReportServer','ReportServerTempDB','1303VISBOC') AND CASE WHEN state_desc = 'ONLINE' THEN ...
2
votes
1answer
18 views

Prevent postgres function of running more than 1 instance at the same time

DBMS: Postgres 9.3.4 OS: Debian 7 I have a plpgsql function that will be put in crontab to run every 15 minutes. The function should finish in about 8 minutes, but just in case it takes more than 15 ...
1
vote
2answers
21 views

Dimension or Degenerate Dimension?

I am taking a course on data warehousing. Currently, I am reading through Ralph Kimball's Data Warehouse Toolkit. I understand that a degenerate dimension is a dimension key that is stored in a fact ...
0
votes
0answers
15 views

MySQL fulltext selection performance

I have 1.5M rows in a table. Following is the table create code: CREATE TABLE `jobs` ( `id` INT(8) NOT NULL AUTO_INCREMENT, `job_id` VARCHAR(50) NOT NULL DEFAULT '', `title` VARCHAR(255) ...
0
votes
0answers
4 views

Searching ObservableCollection's items in a string

i am trying to search an observablecollection's items in a string. I try as in the below code. for (int j = 0; j < DBControl.Instance.SelectLanguagesFromDatabase().Count; j++) { if ( ...
0
votes
0answers
16 views

DBD::mysql complains “Character set 'latin1' is not a compiled character set”

I think this boils down to "Am I doomed to upgrading mysql hoping the problem goes away?". I've seen a few of the same issues around the internet but with no guidance on a fix other than "Did you turn ...
0
votes
1answer
16 views

MySQL: update field with “x hours xx minutes”using int from another field

We have two fields that hold time data totalTime (int): number of minutes (eg 243) totalTimeDesc (string): normal english representation (eg '4 Hours 3 Minutes') We have a lot of different formats ...
1
vote
0answers
14 views

Will redeploying a project to the SSISDB invalidate current jobs

I’ve been given 2 dtsx packages to replace 2 in production. This is for a SQL 2012 server with the packages deployed in the project model. The only way I see to do the update is to export the project, ...
0
votes
1answer
26 views

Last row from a query without Order by

I have something like SELECT var1,var2 FROM table where var3=X AND var4=Y order by var5 desc limit 1; Running this query takes roughly 5 seconds on my database which is far to slow. I was ...
0
votes
0answers
40 views

SQL Server slows down on one expensive query

I have a Sql Server 2012 with lot of CPU and memory. When I run a query with a bad plan the server slow down and all other query, even of other databases, become very slow. When I run the query: - ...
0
votes
2answers
23 views

Update the other columns which are for to have minimum of other 2 columns , difference between 2 columns , and others

I am working on data in oracle 11g as below : subscriber_id | count_s | count_t | min_count | diff | negative_diff | positive_diff 137606401 3 3 3 0 ...
-1
votes
0answers
16 views

upgrading oracle 10 -> 11 ubuntu ORACLE not available

I'm trying to upgrade oracle 10 to oracle 11 on ubuntu (yes I know it's not supported), because this is occurring on a system that had a version of oracle in some cases it thinks it's been configured ...
1
vote
1answer
14 views

Can triggers be used to implement automated polymorphic association?

(Apologies for any bad formatting or ignorance of common practices within this community; this is my first question here.) I'm attempting to (re)design a MySQL database for a personal social ...
6
votes
2answers
114 views

foreign key constraint violation issue

I have identified 3 situations. A student with no enrollments. A student with enrollments but no grades. A student with enrollments and grades. There is a trigger on the enrollments table to ...
0
votes
0answers
13 views

Incorporating Partition Views into a Data Warehouse

I've read some material on how to accomplish this but I want to validate it before proceeding. My understanding is that you: 1) Define the table that we want to add into the partition with the ...
0
votes
2answers
22 views

SQL Server 2014 Install Not Creating Default Instance

I am trying to install SQL Server 2014. The problem that I am having is that during the installation it is not letting my choose whether I want to use a default or a named instance. I have been ...
3
votes
2answers
94 views

How to figure out Disk I/O by table

Is it possible to figure out which tables contribute the most to read / writes operations if all of them in same file? I been looking at the following DMV SELECT * FROM sys.dm_io_virtual_file_stats ...
2
votes
0answers
23 views

SQL Server AlwaysOn log_send_rate

On all our AlwaysOn setups, running Windows 2012 and SQL Server 2012 in virtual machines and on bare metal, I find that the log_send_rate in sys.dm_hadr_availability_replica_states is consistently ...
0
votes
1answer
16 views

Where mysql writes its log seqeunce numbers and last checkpoint at?

I'm working on developing mysql log collecting system. To do that, I have to collect log sequence numbers from mysql LSN and last checkpoint location. But I have no idea where should Which log file ...

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