1
vote
1answer
7k views

JDBC pooling Oracle driver Socket read timed out

I run Java EE application on Glassfish server v3 together with Oracle 12 DB on the same machine under Windows Server 2012 64bit. I use latest ojdbc7 driver. Connection pool config: ...
1
vote
1answer
143 views

DB Design storing products sold in bulk, priced by vastly different units

I am trying to design a database that stores products that are sold in varying different units. Some are priced by product, some by volume, some by length, some by surface area. Possibly some by ...
4
votes
3answers
1k views

Help with SQL Query to XML output

I have the following query: SELECT [ID] AS [NewID] , ( CASE WHEN LEN([MiddleName]) > 0 THEN [LastName] + ', ' + [FirstName] + ' ' + LEFT([MiddleName],1) + '.' ...
0
votes
1answer
288 views

DELETE from OPENQUERY alias not working

I'm trying to use the following code to execute a DELETE statement on a linked server. I'm trying to delete all records from the remote server where there is a match on a certain ID field in both the ...
1
vote
0answers
214 views

Are A or D series VMs better for deploying PostgreSQL on Azure?

In Azure there are VMs that have local storage either as spinning disk (A-series) or SSD (D-series). Considering this space is wiped on reboot... Is there a benefit to choosing the SSD option for ...
0
votes
0answers
44 views

SSMA mysql double to sqlserver decimal, decimals getting cut off

I have a field that is a (signed) double in mysql, and I want it to be a decimal(18,4) in sqlserver. I have changed the Type Mapping for Source Types double and double precision to decimal[18][4] in ...
0
votes
1answer
31 views

Merging 2 queries together

I have 2 query results that need merged together where periods are alike, adding a the column 'seats', using a '0' the period doesn't exist. Before: tdate period staff ...
0
votes
2answers
775 views

Suspended query causing high CPU usage

Environment detail: SQL Server 2008 R2. I have applications running on JBoss that access the DB using JDBC driver. Issue: My online DB server was experiencing high CPU usage. Using the ...
1
vote
3answers
3k views

SQL Query in suspended state causing high CPU usage

Environment detail: SQL Server 2008 R2. I have applications running on JBoss that access the DB using JDBC driver. Issue: My online DB server was experiencing high CPU usage. Using the following ...
17
votes
2answers
268 views

In SQL Server, can I guarantee an order without an explicit ORDER BY clause when an index seek is forced on a table with only a clustered index?

Update 2014-12-18 With the overwhelming response to the main question being "No", the more interesting responses have focused on part 2, how to solve the performance puzzle with an explicit ORDER ...
0
votes
1answer
928 views

xenforo vulnerability, limit max open connections by ip address

Trying to get some emergency help because my website is being attacked. It isn't as much as an actual attack, as it is a small bot to exploit xenforo vulnerability. ...
1
vote
1answer
39 views

transaction log restore

we have an external production database (maintained by another company) and we are trying to build an internal database that replicates the production database for reporting purposes (both ...
0
votes
0answers
65 views

SQL Transaction Logs Overwrite

Server Detail: SQL Server 2008 R2 Production Set Up: In a production environment, I have a DBMR job scheduled to take transaction log backups for all the databases present in a DB server. This job ...
1
vote
2answers
1k views

Filling in date holes in grouped-by-date SQL data

The actual problem involves far more data and joins, but I've created a small sample to demonstrate the issue: -- create example table DROP TABLE dbo.EventRecords GO CREATE TABLE dbo.EventRecords ...
1
vote
0answers
45 views

Best ratio for files and file groups for a highly partitioned table

I have a number of tables with exactly 1000 partitions. Each table can be up to 200G with 100M rows and cannot be compressed. Data in partitions distributed quite equally. The SQL Server has 8 ...
4
votes
2answers
410 views

Backup Database Task - What's the number at the end of the filename?

When using a SQL Server 2012 EMaintenance Plan for backup purposes, the Backup Database Task creates a unique filename. I understand the format all the way to the final set of numbers. For example, a ...
0
votes
1answer
138 views

SQL Server Chain Permission

We have the 2 databases. Reporting HR There are some users who want to extract data from HR database. But we don't want to give direct access to that HR database. So, we created the special ...
5
votes
1answer
168 views

How do I determine the spid of the session that is making a query on a linked server?

I have a session running on a SQL Server instance that is blocking other sessions (holding on to a lock without releasing it). Querying sys.sysprocesses yielded the hostname of a different SQL Server ...
46
votes
6answers
6k views

Retrieving n rows per group

I often need to select a number of rows from each group in a result set. For example, I might want to list the 'n' highest or lowest recent order values per customer. In more complex cases, the ...
0
votes
1answer
55 views

can I use many-to-many relation with weak entity

I have an entity, for example employee(key employee ID), and every employee can have multiple responsibilities. Every responsibility can be tasked to multiple employees. I have 3 options: 1) Create ...
1
vote
1answer
138 views

Optimizing intersect query in MySQL

I'm facing a performances problem in our MariaDB server. We have a table linking users to pages, a user belongs to 1+ pages. I have a page that have users and I want to get the 10 best pages based ...
1
vote
1answer
93 views

Best approach to get last value inserted

I have several devices that report via Edge network their position (and more data) to a UDP server which directly inserts this data in a SQL 2008 r2. I want to know which is the best approach to ...
0
votes
0answers
165 views

Is my SQL Job causing the High Disk usage?

I have a concern regarding High Average disk queue length for one of my server with below configuration: Version: SQL 2005 with SP3, standard edition. windows: version 2003 r2 SP2 No Processors= 4 ...
0
votes
1answer
68 views

SSIS Condition that include two connections/data bases

In a SSIS package , I need some sort of condition that include two connections. The simplified problem is: A simple CSV import to SQL Server, DB1, table 1( col1, col2 ). I need to populate table 1 > ...
0
votes
1answer
457 views

SQL Server CE 4.0 network share access

In our application we are planning to use SQL Server CE 4.0 using OLE DB. The connection string is shown below. Dim strConn As String = "Provider=Microsoft.SQLSERVER.CE.OLEDB.4.0;Data ...
0
votes
1answer
65 views

The purpose of transaction log in Restore First

Based on this article , the golden role for restore first After restoring full database backup, restore latest differential database backup and all the transaction log backup after that to get ...
1
vote
0answers
221 views

Why is Update Query Slow with correct Indexes?

I have a query that updates a temp table. There are 2 Filtered indexes (by date) used in this query. However, the update take 8-10 mins to run. I am struggling to find out why it is so slow. There is ...
10
votes
1answer
535 views

Visualizing SQL Server Extended Events data

Lately I've been exploring using Extended Events in SQL Server to help me benchmark and optimize various queries. So far, to view the event data I have been using the "Watch Live Data" feature in ...
5
votes
1answer
2k views

How do I use pg_dump and pg_restore to move a large database to another machine?

I'm a bit unclear on how to use the pg_dump/pg_restore duo to move a large-ish database. Here is the command I use to dump the database (the host and username are taken from environmental variables): ...
24
votes
3answers
3k views

Excessive sort memory grant

Why is this simple query granted so much memory? -- Demo table CREATE TABLE dbo.Test ( TID integer IDENTITY NOT NULL, FilterMe integer NOT NULL, SortMe integer NOT NULL, Unused ...
1
vote
0answers
53 views

Recovery model of current database

I want to know how can I change the recovery model of my current database. I am having sysadm rights.Operating system is windows, Db2 10.5. can some one let me know the command please
0
votes
1answer
625 views

Migrating everything to do with a schema from one Oracle DB server to another

We have an old DB server, running Oracle 11g on Solaris. We also have a new DB server, also running Oracle 11g, but on RHEL. We want to move a schema to the new db - but we need everything it refers ...
4
votes
1answer
55 views

the <set clause>'s <multiple column assignment>

I just know a little sql basics and need to write a plain sql syntax highlighter/checker So I'm fighting through the standard... I stumbled over somthing I'm not sure I understand it right, as I never ...
0
votes
0answers
1k views

How to compare between two values in one field depending on another field in SQL* / Oracle Reports?

I have three fields in a table named table_family. One is "relation" it has 3 kinds of values 1 for person, 2 for parents, 3 for son. Other field is "age" and it contains the ages of all the ...
3
votes
1answer
297 views

Recursive CTE to find unique slug

I have an article table where I want the slug to be unique. CREATE TABLE article ( title char(50) NOT NULL, slug char(50) NOT NULL ); When the user enters a title e.g. News on Apple, I want ...
3
votes
1answer
90 views

Suspect (Torn) Pages recorded in TEMPDB? (SQL Server 2005 SP3)

I have a virtualised SQL Server 2005 (SP3) server that reported the following msg: Database_Name, Database_Id, File_Id, Event_Type, Event_Type_Desc, Error_Count, Last_Update_Date tempdb, 2, 1, 3, ...
0
votes
1answer
202 views

ubuntu - Pm2 mysql high cpu usage [closed]

Not sure what is going on here but would love some help if any can. I am running on digital ocean 1GB ram ubuntu server a node.js application that is is launched with pm2 and that uses a mysql ...
0
votes
1answer
266 views

MySQL audit storing application user ID

I am trying to set up auditing for changes to data in MySQL tables, for my Perl web application on Linux. I've had a look at this: ...
5
votes
1answer
31k views

Installing SQL Server 2012 - Wait on the Database Engine recovery handle failed

I am installing SQL Server 2012 SP1 on a new Windows 8.1 machine. During installation I get this error: (Screenshots similar to this question) TITLE: Microsoft SQL Server 2012 Service Pack 1 ...
-1
votes
1answer
29 views

Sorting a table based on nullable Position field that has to match the position on the result set

I'm using SQL Server 2012 I have a simple table that has a Nullable (int) Position and a (datetime) Created field. I would like to do a select * from this table order by created desc but ...if a ...
3
votes
1answer
148 views

Possible reasons for irregularly high query execution time?

The above is a graph showing the average response times per second (including error bars) for an experiment where I simulate 30 clients which are all invoking the same query multiple times. I ran ...
1
vote
2answers
120 views

MySQL returns floats rounded

> CREATE TABLE test(foo FLOAT); > INSERT INTO test VALUES(1.2899999); > SELECT * FROM test; +------+ | foo | +------+ | 1.29 | +------+ While it's obvious that FLOAT is not a precise data ...
0
votes
1answer
512 views

PostgreSQL: PANIC: heap2_redo: unknown op code 32

I was doing migrations while the server was still accessing the slave DB. I have a master / slave setup. After I restarted the server, I realized I couldn't connect to the SLAVE anymore. I went into ...
1
vote
1answer
331 views

Postgresql csv to db translate foreign keys

I'm trying to import data from a csv to a postgresql database. the db table looks like this: CREATE TABLE texts( text_id serial PRIMARY KEY, topic_id integer REFERENCES topics, format_id integer ...
1
vote
2answers
45 views

Optimal indexing for SELECT (mysql)

What indexes would you recommend for the following select (and why)? Keep in mind there can be tens of millions of rows. SELECT * FROM mytable WHERE md5 = ? AND created_at >= ? AND created_at ...
1
vote
1answer
48 views

trying to understand table size

Can somebody help explain the "data_length" of the table? Why is it so big in my example below of a table with just one column and one row? mysql> create table `network_type` ( `id` int(11) NOT ...
0
votes
1answer
3k views

Trigger syntax on phpmyadmin

I can't make this work. I want to create a trigger that deletes the child foreign keys before I delete the parent primary key. This is the code that I am using on phpmyadmin: delimiter // CREATE ...
1
vote
1answer
233 views

MySQL 5.6 Datetime Range

According to MySQL 5.6 doc, the supported range for datetime data type is '1000-01-01 00:00:00' to '9999-12-31 23:59:59'. But when I tried inserting values that are earlier than '1000-01-01 00:00:00', ...
1
vote
1answer
144 views

Delete back ups more than 2 weeks in sql server

I am not a DBA, I need to delete the USER_DATABASE backups older than 2 weeks. Is this below stmt work for this scenario? EXECUTE dbo.DatabaseBackup @Databases = 'USER_DATABASE', @Directory = ...
1
vote
1answer
4k views

Standard data types for email address, telephone number , first name, rixh text editor, etc

I want to build a database for our system using Sql Server 2008 R2. but i need to know what are the best data types for storing these info:- Email address Telephone number with extension, such as ...

15 30 50 per page