4
votes
2answers
1k views

Is it possible for SQL Server to miss rows on a select * where PK = “value” query

We have just migrated an application to an SQL Server 2008 R2 from SQL Server 2005 and moved from a physical to virtual hosting environment. I have a very strange error in our application and I was ...
0
votes
2answers
118 views

Query Cache Implementation Details

I am new to DBA stack exchange & this is my first question. Kindly help me in finding a low level documentation for Query Cache module in MySQL since I am planning to work with the source code of ...
3
votes
1answer
86 views

Specifying Oracle Service Name in UNIX Profile

Is there any way we can specify Oracle Service Name in UNIX Profile? I know that there is an environment variable ORACLE_SID for specifying SID in the Profile, But how about service name? If there ...
1
vote
3answers
225 views

Preventing SQL Injection

I know that this is very dangerous: EXEC sp_executesql 'SELECT * FROM ' + @Table But, is this safe from SQL injection? IF EXISTS(SELECT * FROM information_schema.tables WHERE TABLE_NAME = @Table) ...
0
votes
2answers
920 views

Dynamic permissions

I have a application that creates tables in one user's schema and another user needs to be able to use the dynamically created tables. Example: Application creates User1.RandomTable User2 needs ...
27
votes
8answers
2k views

Security implications of restoring a backup from an unknown source?

Scenario: You're handed a database backup and told to restore it to a server (that's already hosting other databases), but are given no useful information about what the backup contains or whether the ...
0
votes
1answer
2k views

configure client ibm_db2 for php

I am installing a RHEL server with nginx and php that can connect to a db2 database, download and install the "IBM Data Server Client" package, also install the pecl library through: pecl install ...
0
votes
1answer
162 views

installing mysql 5.1 alongside mysql 5.5

mysql 5.5 is installed. I need 5.1 to install an old website so it can be updated. The installer refuses to let me install onto the disk with 5.5. I don't have any other disks. I downloaded the ...
0
votes
0answers
105 views

A working view now starts timing out

I have 2 identical databases (one larger, one smaller) with identical views. Recently a view on the smaller DB started timing out. Google searches seems to point to deadlocking of some sorts. If I ...
2
votes
1answer
5k views

Postgresql: set default psql client encoding

When I connect to a Postgresql DB using psql, I often get these messages: => SELECT * FROM question_view ; ERROR: character with byte sequence 0xd7 0x9e in encoding "UTF8" has no equivalent in ...
4
votes
2answers
10k views

Restoring MySQL Tables from .ibd, .frm and mysqllogbin files

For some reason, when I try to open up my tables that are stored in .frm and .ibd files (whether on MySQL or phpmyadmin) it gives me a syntax error or it says it does not exist. I've read the other ...
0
votes
1answer
493 views

Mixed search in multiple columns

I have a table which has a particular column of type JSON, where some user's contact information are stored. I can alter the table and add new columns with cached values to increase search performance ...
0
votes
1answer
51 views

Could not access database

I have been trying to setup a local instance for a new application. I am new to MYSQL and I cannot understand how to actually connect this database to the actual web application sitting in the ...
0
votes
1answer
1k views

syspolicy_purge_history job failed at step 3

In one of my SQL Server 2008 sp1 standalone instances, syspolicy_purge_history job is fails at step 3 Erase Phantom System Health Records. Below is the command - (Get-Item ...
1
vote
1answer
292 views

Troubleshooting vanishing fulltext index in SQL Server 2012

I am trying to get to the bottom of some weirdness. Yesterday I enabled a fulltext index on a table in SQL Server 2012 running on one of our LAN servers. I used the Wizard and set the index to update ...
2
votes
2answers
88 views

I need help optimizing a not that complicated query that returns unexpedcted performance problems

I have a table that stores details about incoming and outgoing phone calls such as when a call was made, or when a call was received, the phone number of the caller, and the phone number of the ...
0
votes
0answers
43 views

Is there any way to avoid SSMS 2012 allocating extra 1.5 GB RAM for non-standard color scheme?

SSMS 2012 allocates 1.7+ GB of RAM if the colors for Text Editor are different from default. Every few keystrokes GUI freezes for 5-10 seconds, which does not occur with standard color scheme. When ...
0
votes
1answer
865 views

execute [SSISDB].[catalog].[create_execution] with 'execute as"

We are testing a 3rd party tool to schedule/execute jobs in our environment so trying to test launching SSIS packages within the integration service catalog. I have found examples of the code to run ...
0
votes
1answer
107 views

Oracle service names with a minus sign (?)

Are there any reasons not to use minus signs/dashes/hyphens in Oracle service names? DBMS_SERVICE, tnsping and sqlplus seem to be fine, but the documentation says no. We are switching from Oracle ...
2
votes
1answer
114 views

MySQL Stored Procedure Requiring SUPER

I'm trying to figure out a "safe" way of allowing a non-SUPER user to execute a specific command requiring SUPER privileges, i.e. SET SESSION binlog_format = 'MIXED'. I don't want to grant the user ...
0
votes
0answers
21 views

MySQL Is there a performance difference between col = val and col IN (val)?

Is there a significant performance difference, or any other reason why I shouldn't write, for example: SELECT * FROM table WHERE col IN (val); Instead of: SELECT * FROM table WHERE col = val; I ...
1
vote
1answer
2k views

MySQL Syntax - Searching points within polygons using GeomFromText

I am trying to select points within polygons using the GIS/spatial extensions for MySQL. I'm fairly new to this, so bear with me if this is an elementary question. I have points defined as text ...
1
vote
1answer
106 views

my phpMyAdmin data is hashed or hexed?

I have a mySQL db setup in MAMP in which I connected mySQL Workbench to administer the design of the database. When I inserted some data today from within myPhpAdmin (localhost:8888), I noticed the ...
1
vote
0answers
56 views

Strategy for multiple distinct databases in PostgreSQL

I have a 30 gb db in PostgreSQL 9.2. Running On Amazon Linux on an ec2 (web virtual machine), with the data directory mounted from its own drive (EBS). I'll call the database db30. On production ...
5
votes
2answers
706 views

Symmetric difference operation in Transact-SQL?

I have always known about the UNION operator in SQL, but only recently discovered that there were other set operators, INTERSECT and EXCEPT. I haven't been able to find an operator that does the ...
1
vote
1answer
238 views

mongodb - “replication oplog window” possibly reduced due to profiling - when profiling disabled no change?

PROBLEM I have a 3 member replica set (no sharding) running mongodb version 2.4.8. Using MMS (Mongo Monitoring) I can see that on 7th July 2014 at 12:00 my "replication oplog window" dropped from ...
-3
votes
1answer
1k views

Getting number of errors in stored procedure [closed]

I am getting an error in stored procedure as follows: Msg 156, Level 15, State 1, Procedure K2_CHECKENTRYINFILELOG, Line 27 Incorrect syntax near the keyword 'if'. Msg 102, Level 15, State ...
1
vote
1answer
542 views

Split two rows into two columns

I have the following table: id | name | action | count ------------------------------ 1 | Value1 | 0 | 27 1 | Value1 | 1 | 49 2 | Value2 | 0 | 7 2 | Value2 | 1 | ...
0
votes
2answers
2k views

Copy DB from SQL Server 2008 to SQL Server 2012

I have several databases on SQL Server 2008 that I wish to transfer to SQL Server 2012. The two servers are on the same network but separate domains. I am attempting a DB Copy from the one server to ...
1
vote
1answer
328 views

Sql Server sys.Traces log

Working with traces on production server I found some mysterious entries to me in sys.Traces, When I run below query it shows me status of all traces as ‘Paused’ along with entries in ...
3
votes
1answer
1k views

Index for finding combinations of attributes in JSON array

Based on this related question on SO. This works fine if you only want simple matches. Suppose tracks have both Artist and Title field in the JSON data. So we have something like: INSERT INTO tracks ...
1
vote
3answers
8k views

Remove ORA-01100:DATABASE ALREADY MOUNTED

I am using Oracle 11g and there is a database create during installation name "xyz" and user "xyz".Now i created a user 'abc' and gave following permission to abc. "CREATE SESSION, ALTER SESSION, ...
1
vote
1answer
25 views

The query result changes in remote and local database

The below table is created in local database and remote databases. CREATE TABLE EMPLOYEE1 ( EMP_ID INTEGER, EMP_NAME VARCHAR(10), EMP_DEPT VARCHAR(10) ); Insert the below rows in tables created in ...
0
votes
2answers
2k views

Where are my .NDF files located?

I have created a sample database called TestDB. After that, I ran this select: select * from sys.master_files I found my .MDF, .LDF files from this select. Then I want to find out the .NDF file ...
2
votes
1answer
711 views

Explicitly granting permissions to update the sequence for a serial column necessary?

Recently I did create a table as a superuser including a serial id column, e.g., create table my_table ( id serial primary key, data integer ); As I wanted my non-superuser user to have ...
0
votes
1answer
239 views

mongodb master slave replication

I Have Setup master slave replication in mongo its working fine for few month then after that suddenly replication fails.I have started again with initial sync but during sync after a specific point ...
1
vote
1answer
389 views

mysql fulltext query is very slow

I have one table for User detail in MySql with about 500000 records in it. I have also created fulltext index on firstname, lastname field on this table. but when I am trying to search any single ...
5
votes
1answer
521 views

Percona MySQL 5.5 Unique key is duplicated

I'm totally out from ideas, so maybe somebody else could answer my question. We have a MySQL 5.5 server from Percona with high traffic. The application is in PHP and writes always to master. We have ...
0
votes
1answer
44 views

How to confirm that chunk transfer is completed on a DB

I have one case where i create db for Daily data. I have some collections in this db which are sharded. My requirement is as follows: Create every day DB If There is a DB which is more than 7 days old ...
2
votes
2answers
82 views

Defragmentation of Indexes - Higher value after defragmentaion

I am trying to defragment indexes on SQL Server 2008 using ALTER INDEX--REBUILD. After defragmentation some indexes have fragmentation percentage value greater than its before defragmentation value. ...
0
votes
3answers
3k views

What is the EXPORT privilege on ORACLE

I have created a user say A. I want to export some of my schemas using A user. For example, I have B and C users. I want to export B schemas using A user. Which grant do I have to use? I am using ...
1
vote
1answer
6k views

Streaming replication Postgresql 9.3 using two different servers

Settings in master server: max_wal_senders = 1 wal_level = 'archive' archive_mode = on archive_command = 'cd .' wal_keep_segments = 10000 Settings in slave server: in recovery.conf file: ...
0
votes
0answers
624 views

Can a stored procedure OUTPUT parameter return a table as output?

I would like to know whether we can use a stored procedure's OUTPUT parameter to a return table as result set? I would appreciate any practical example using it OUTPUT parameters in stored ...
3
votes
1answer
591 views

Efficiently searching geolocations - LAT/LNG and DECIMALs

I have a database with > 7.5 million rows (and growing), each with an image record that has a specific LAT/LNG geolocation representing where the photo was taken, stored as DECIMAL values - ...
0
votes
2answers
41 views

Can I set up a SQL Server database based on an excel file which refreshes automatically with any changes in the source excel file?

Can I set up a Server database based on an excel file which refreshes automatically with an changes in the source excel file? I am currently using SQL Server 2008?
1
vote
2answers
44 views

Aggregating on a repeated group

In a current report, I'm trying to track the migration of a person from department n, to n+1, or to n+k. My data is split into a row per term (university data). An example: dept | term ...
0
votes
0answers
66 views

Select and sum from related columns

I have table with the following columns: date (month), hours/days (31) and daily tasks (31) Columns: date day1 day2 day3....task1 task2 task3.... Records: june 4 6 2 .... run walk ...
5
votes
1answer
4k views

Can I replicate a database from SQL Server 2012 to SQL Server 2014 (with 2014 distributor)?

I am planning to have database replication running from SQL Server 2012 (publisher) to SQL Server 2014 (both distributor and subscriber) -- pull replication. Has anyone done this type of ...
0
votes
1answer
106 views

Upgrade SQL Server 2000 engine

I have SQL Server in which I need to upgrade and restore a .bak file Server 1: Microsoft SQL Server 2000 - 8.00.194 (Intel X86) And by requirements I need it to match Server 2: Microsoft ...
1
vote
1answer
409 views

Why Are My Mirrored Databases Changing States on Their Own?

Setup: SQL Server 2005 w/SP4 64-bit Standard for all three servers Windows Server 2008 R2 Enterprise w/SP1 64-bit for all three servers 01 is designated as the Principal 02 is designated as the ...

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