6
votes
2answers
330 views

What is the most efficient way of inserting 199 millon rows of data?

I have a 2.2 GB text file in the format of: 1234567890 1234567890 etc....... I need to insert each line into a table (field 1) such as: CREATE TABLE [dbo].[table]( [field1] [varchar](10) NOT ...
2
votes
2answers
2k views

SQL Server 2008 R2 SQL Server has encountered x occurrence(s) of I/O requests taking longer than 15 seconds to complete on file '

When I alter or create a stored procedure directly on production or QA database, after a few seconds I start experience timeouts and application becomes unavailable. Log files shows this error: ...
1
vote
2answers
2k views

Is there a way to find out how many times a stored procedure was invoked since last DB start

I am currently in a fairly mismanaged environment, where stored procs were introduced to the database over a few years and some versions became obsolete. Is there an easy way to figure out (preferably ...
4
votes
3answers
2k views

Log MySQL DB changing queries and users

For security reasons I need a server-side (running Debian 6.0 Squeeze) logging of all queries that may have changed the content of a MySQL DB (v. 5.1) and the user who issued it. I had to rule out ...
13
votes
3answers
8k views

Does “WHERE 1=1” usually have an impact on query performance?

I recently saw the question "where 1=1 statement"; a SQL construct I have used often in constructing dynamic SQL in an effort to write cleaner code (from the perspective of the host language). ...
1
vote
1answer
2k views

Creating an index in a temporary tablespace

I am trying to create an index for a relatively large table (80M rows). First I got an ORA-01652 error, then I searched in SO and found a related question. However, trying to implement the steps ...
3
votes
1answer
1k views

Programmatically copy index from one table to another, via a stored procedure?

I use a stored procedure to copy the tables from one database to the other database. Right now it does insert into copy select * from original I would like to copy the index from the original ...
1
vote
1answer
303 views

Design Tagging module in the database

I've a database system which we want to define tags for many tables into it. For example I've videos, photos, ... different entities that we wish to make them taggable. The tags could be anything. By ...
2
votes
2answers
3k views

“ORA-00942: table or view does not exist” when deleting from a very real table in the user's schema

I have a table that definitely exists in the logged-in user's schema (therefore I own the table) and is not a view/synonym/anything wacky. I can select from it, but when I try and either insert, ...
3
votes
2answers
48k views

How to include a datetime parameter within a stored procedure along with string query?

My stored procedure is as follows, -- Add the parameters for the stored procedure here @FromDate datetime, @ToDate datetime --Select query DECLARE @query nvarchar(max) ...
2
votes
1answer
15k views

Oracle 11g Listener not working

The listener on my Oracle 11g instance is no longer working. I tried to start it but that doesn't work. There are no Linux processes for the listener: > lsnrctl start LSNRCTL for Linux: Version ...
8
votes
4answers
704 views

How can I know which store procedure or trigger is using a table on SQL Server 2008 R2?

This is the case that in the DB I'm checking, there is an archive table which keeps the user history, and there is a trigger or store procedure that after some time delete rows from this table, in ...
4
votes
1answer
405 views

Speed inserts in database with a table with +47 million data per each year, containing more than 10 years?

I'm moving my database to mysql but there is one table that is pretty big (more than 47 million rows for each year) and it takes years to insert all the data. I already tried everything I found in ...
1
vote
2answers
916 views

Oracle Linked Server query error

We have a problem with a query from a SQL Server 2008R2 - 64bit to an Oracle Linked Server. We use the Oracle 64-bit driver for Windows. When we query a certain table we get the following error: ...
5
votes
1answer
1k views

What is Sql Server Clustered Index in Oracle terminology

A clustered index in sql server like a dictionary or telephone directory. A,B,C,D it goes on. If you look up with a name Ozgur you start O then z etc. I would like a simple explaination for this ...
1
vote
4answers
7k views

Can't create user in SQL Server

Hi guys when I try to create user for my database I always encounter this kind of error. This is the sequence of task I done. I manage to create new login using windows authentication of SQL then ...
5
votes
1answer
230 views

How can I efficiently represent inheritance down a tree?

I have a database with three "levels" of objects: A, B, and C. Table A has around 100000 rows, B has 500000, and C has 2 million. In a fit of stupidity, I designed the database to use joining tables ...
2
votes
3answers
695 views

RAM Impact on Oracle database operations

We are seeing drastic change in the amount of time taken for db operations depending on ram size. The same content when inserted into a db running on a 4gb ram machine takes about 600% more than into ...
1
vote
1answer
79 views

RAM Impact on database operations [duplicate]

Possible Duplicate: RAM Impact on Oracle database operations We are seeing drastic change in the amount of time taken for db operations depending on ram size. The same content when ...
3
votes
1answer
742 views

What is object Server?

As I was reading article I came across IBM's site about object Server. What actually is Object Server and what are it's uses? Can this be explained for a beginner?
2
votes
1answer
486 views

Return Output from SQL Function using command line SQLCMD

I have a SQL Function that returns an Integer as the Output. I need to execute it via sqlcmd and I only want to get it's integer output. However right now I'm getting back this type of output: ...
1
vote
2answers
815 views

MySQL UPDATE Performance Issue

I'm running out of ideas on a performance bottleneck I'm seeing on one of my projects. The table in question is pretty small, with only 5396 records. However, I'm seeing queries like this show up in ...
2
votes
2answers
104 views

Extra tables are added when I create a new Database

This is a really weird problem. When I create a new DB from a script I'm getting extra tables added. These aren't system type tables but regular tables that look like they may have come from a past ...
10
votes
3answers
10k views

One Big Database vs. Several Smaller Ones

We have a situation were we can (A) deploy instances of an applications in one MySQL database using table prefixing or (B) use different MySQL databases for each instance of the application, for e.g., ...
12
votes
5answers
6k views

SQL Server 2008 Full Text Index Never Seems to Complete

Our website has a SQL Server 2008 R2 Express Edition database with full-text indexing for our website search. Each time a new record is added or updated in one of the indexed tables, the indexing ...
9
votes
3answers
2k views

How recording of every change of a row in a database is generaly stored?

In a project I'm working on, every change to the rows in some tables of the database must be tracked for further audit or rollback. It must be easy to find who modified the row, from which IP address ...
1
vote
0answers
4k views

Transactional replication subscription not showing in SQL Server Management Studio [closed]

I tried to set up 3 SQL instances, one publisher 2 subscribers, to replicate data between them. I did it using the GUI wizard and all went fine in the Publisher: my publication appears under "Local ...
5
votes
1answer
61k views

How to determine used/free space within SQL database files? [duplicate]

I normally use the following method to determine the free/used space within each file of a database: Select *, fileproperty(name, 'SpaceUsed') as Used From dbo.sysfiles This returns total and used ...
0
votes
1answer
595 views

Oracle: Extract Graphical Database Representation [duplicate]

Possible Duplicate: Oracle Creating ER Diagrams and Data Dictionaries How can I extract a graphical (schema) representation of an Oracle database (tables and their relationships; with ...
1
vote
1answer
3k views

High PageIOLatch_SH Waits with High Drive Idle times

We are experiencing high volume of PageIOLatch_SH waits on our database (row counts in the Billions). However it seems that our drive Idle time Percentage hovers around 50-60 percent. CPU usage is ...
5
votes
2answers
8k views

Why Isn't the SQL Server Agent Service Set to Automatic Startup by Default?

After a default install of SQL Server 2008 R2, the SQL Server Agent process seems to be set to manual startup. What is the reason for this? Is setting to automatic a bad idea or pointless for some ...
11
votes
4answers
474 views

Determining that Indexes on a table are unused

I’ve been running this script to try to find extraneous indexes select o.name as TableName, i.name as IndexName, p.reserved_page_count * 8.0 / 1024 as SpaceInMB, s.* from ...
3
votes
5answers
819 views

Pros and cons of having one table per entity vs. having a shared table with an extra column indicating the entity type

I am working on a database design and am wondering about the pros and cons of two setups. I am going to collect data about two types of entities, lets say cars and boats. The structure of the data ...
1
vote
4answers
2k views

How to avoid select combinations created with multiple parameters (with value or without value) passed in to stored procedures for a select in sql?

I've a situation where 4 parameters are passed to a stored procedure, on the basis of the existence of these parameters i need to modify the where condition of my select query. Simply i can use ...
3
votes
1answer
786 views

How can I get MySQL to use the value returned by a function as a default?

I have a pre-existing table that has a column to that can hold a UUID. I'd like to be able to define a default such that new rows coming in (from legacy systems) will still get a UUID defined, via ...
6
votes
5answers
596 views

Are these good indexing guidelines?

I use indexes regularly but it's still hard for me in certain conditions to know if they are helping or hurting. There are a few guidelines I follow, but I am not sure if they are good nor am I sure ...
2
votes
1answer
654 views

Can High Water Mark be cleared?

Lately I experience below errors when restoring db2 database SQL2043N Unable to start a child process or thread SQL1084C Shared memory segments cannot be allocated db2stop and then db2start ...
6
votes
2answers
7k views

How to know if I am running SQL Server 2008 R2?

I ran @@version. This is what it gave me: Microsoft SQL Server 2008 (SP2) - 10.0.4000.0 (X64) Sep 16 2010 19:43:16 Copyright (c) 1988-2008 Microsoft Corporation Enterprise Edition (64-bit) on ...
6
votes
2answers
2k views

Error on import of mysqldump file - Illegal double value found during parsing

I am currently getting the following error while trying to import / restore a mysqldump file: ERROR 1367 (22007) at line 445: Illegal double '1.79769313486232e+308' value found during parsing I ...
2
votes
3answers
1k views

SQL Reporting Services - T2Embed.dll missing

When generating a report in SSRS, I receive the following error: There was an error generating your report. Please refer to item 673778174106859 for additional diagnostic information. There was an ...
12
votes
3answers
8k views

Best way to design tournament database

I'm creating a webpage for placing bets on all matches of the upcoming Euro 2012 football tournament. Need some help deciding what approach to take for the knockout phase. I have created a mockup ...
3
votes
2answers
905 views

How to identify connections using implicit transactions?

I'm investigating a blocking issue that I believe is related to implicit transactions not being committed or rolled back. How can I identify connections that have turned the implicit transactions ...
1
vote
1answer
189 views

Oracle bitand inconsistent behaviour

I'm working on a legacy database using bitmaps for searching. I'm using the bitand function to find bitmaps that match a given bitmask but I'm getting the wrong results: the bitand between two numbers ...
3
votes
1answer
525 views

Oracle Materialized View

I need your help with a issue on Oracle Materialized View. I created the Materialized View using the following command: CREATE MATERIALIZED VIEW SNAP_TEST TABLESPACE tbs NOCACHE LOGGING NOPARALLEL ...
2
votes
1answer
10k views

Column size with datatype decimal

According to BOL for SQL Server 2008 R2 the data type decimal requires the following storage bytes: Precision Storage bytes 1 - 9 => 5 10-19 => 9 20-28 => 13 29-38 ...
0
votes
2answers
1k views

In SQL Server 2008, is possible to one database subscribe 2 publications for the same database? (merge replication)

I'm trying to set up an high availability architecture using merge replication. I have 3 databases, and I'm trying to keep them all up to date with merge replication. So far I've manage to create one ...
2
votes
1answer
3k views

Meaning of SSMS database icon preceded by scroll with red x

SSMS 2008 R2, connecting to a 2008 instance shows the above glyph in SSMS Object Explorer. None of our other instances show that icon. I've moused over it in the vain hopes that I'd get a useful ...
2
votes
2answers
356 views

UDF And Query Plan Caching

I have a multi statement table value UDF. That builds a temp table then returns it as the result. The first time its executed it takes 5 seconds, subsequent executions with the same parameters take 1 ...
16
votes
2answers
84k views

Oracle: Quick way to list all database links

The title says it all, is there a way to quickly list all the current database links in oracle? Something along the same lines as this, which lists the current user's tables: select * from ...
2
votes
2answers
4k views

Solving high page load time using SQL Profiler

I'm looking into a performance of a login page taking 10-13 seconds to load. I'm using a DEMO database to test the performance and tweak to see any improvement. I'm using SQL Profiler to capture what ...

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