2
votes
1answer
165 views

SQL Server data files and RAID

I have a server with a RAID1 volume (OS + apps) and a RAID10 volume (database). The RAID10 volume has 6 physical disks. Should I split the SQL Server database into 6 datafiles (one for each physical ...
1
vote
0answers
173 views

ORA-01115 error with data pump export [closed]

I exported DMP file but the end of the logfile displays this message: 0 rows ORA-31694: master table "CREG_OP"."EXPDP_TAMIN" failed to load/unload ORA-02354: error in exporting/importing data ...
1
vote
1answer
310 views

SQL Server 2012 Developer edition questions

I'd like to use SQL Server 2012 Developer Edition on our development/test server, which is a dedicated server rented from an online company. When the product is ready, I would like to have it ...
2
votes
2answers
164 views

MySQL login after secure installation

I have installed mysql5.5 via secure installation procedure by using: sudo mysql_secure_installation Now when I am trying to login in MySQL from the terminal by using: sudo -u root -p The ...
2
votes
1answer
565 views

How to UPDATE a column by COUNT of FK from another table?

How to extend this query for the entire table, to update all ids? UPDATE table1 SET number=( SELECT COUNT(*) FROM table2 where id=1 ) WHERE id=1 id is the PRIMARY KEY in table1 and FK in table2. ...
7
votes
1answer
514 views

Temporal Validity and Primary/Foreign Key Relationships

I've read through several of the oracle tutorials that show temporal validity and time features. However, in the examples I'v read, there is no primary key used in the demo tables. ...
8
votes
1answer
549 views

In case of multiple updates of the same record in a single transaction, how many versions are being stored?

According to MSDN article by Kimberly L. Tripp, Neal Graves's "SQL Server 2005 Row Versioning-Based Transaction Isolation "... All the earlier versions of a particular record are chained in a linked ...
3
votes
2answers
4k views

How to move from 32bit SQL Server install to 64bit?

A production server has accidentally been installed with SQL Server 2012 32bit version, while it needed a 64bit version. How best to fix this issue? Is it possible to simply UPGRADE from 32 to 64 ...
0
votes
2answers
203 views

64bit SQL Server with total virtual address space of 4GB. How could this be?

My SQL Server 2012 Standard edition, 64bit has a total virtual address space of 4GB. Why is that? it is a 64bit installation: print @@VERSION : Microsoft SQL Server 2012 (SP1) - 11.0.3128.0 (Intel ...
-1
votes
1answer
322 views

What is Oracle Database Vault and how does it work?

I am new in oracle database.I am following oracle official site for learning oracle database vault.But i am not satisfied yet.Please help me for getting a preliminary knowledge about oracle database ...
22
votes
3answers
10k views

Can a single PostgreSQL query use multiple cores?

In recent versions of PostgreSQL, can we share a query between two or more cores to get a performance boost? Or should we get faster cores?
0
votes
0answers
346 views

Error ORA-06550

CREATE OR REPLACE PROCEDURE pro_department_report AS v_did department.deptid%TYPE; v_dname department.dname%TYPE; v_sname student.sname%TYPE; v_count NUMBER(2); v_sdid student.deptid%TYPE; CURSOR ...
0
votes
1answer
2k views

Move data from one table to another

How do I retrieve data from one MySQL table and store the data into another database table on the same server. I have tried this code but keep getting errors: CREATE PROCEDURE `ProfusionTest` () ...
2
votes
3answers
256 views

Database design for excel-like data

The task I need to store the some values in sequence in the database. The data looks just like a sequence of numbers. Here is an example of the data: Val_1 Val_2 Val_3 ... ...
7
votes
1answer
1k views

PostgreSQL PREPARE query with IN () parameters

I'm trying to prepare a query from PHP like: pg_prepare($con, "prep", "select * from test where tid in ($1)"); and then execute it with: $strpar = "3,4,6,8,10"; pg_execute($con, "prep", ...
1
vote
0answers
255 views

How to ignore optional prerequisites when installing Oracle database in silent mode? [closed]

I was referring to this PAGE to install Oracle 11g database in silent mode. When installing, there were some optional prerequisites which are ignorable: CAUSE: Some of the optional prerequisites ...
6
votes
1answer
379 views

SQL Server: How to get the responsiveness of a trigger, without blocking the transaction that fires the trigger?

On a thread today I posed a desire to get code to execute immediately when a record is inserted rather than resorting to polling. Triggers are powerful tools, yet dangerous places to put real code, ...
3
votes
2answers
332 views

Is this amount of disk IO expected with MySQL?

I am running MySQL 5.5.34 on an Amazon EC2 micro instance with EBS (elastic block storage). The instance has been running for around 10 days and according to Amazon I've accumulated around 8.5 ...
-8
votes
1answer
2k views

In SQL Server, how to launch a python script from an insert trigger? [closed]

We have a nice piece of python that sends some emails and interacts with a cloud system. Works fine. But we have to fire it every few minutes to poll the db. We really need, for business purposes, to ...
0
votes
0answers
8k views

can anyone help “Starting MySQL.The server quit without updating PID file (/[FAILED]mysql/<<hostname>>.pid)” [closed]

Upset because there is no help from the related answer I found here. The version of mysql on my host is 5.6.14-1. The error occured when I start the server as below. Sorry for I can't show the ...
1
vote
1answer
155 views

Does Oracle 10g Express Edition have enough storage? [closed]

I am going to develop a simple library database with less than 10 tables. Each table would only keep text records. The library has about 10,000 volumes of books and about 2,000 members. Would the ...
0
votes
1answer
75 views

Tracking changes on a replication slave

I suspect the answer to this is "you're boned", but I'd like to see if there are any good options that I haven't explored. We're building a system that will integrate with a 3rd-party POS system and ...
3
votes
2answers
2k views

Merging two backups form a postgresql database

I have a kind of big postgresql database and two backup files (each uncompressed dump file ~56 mb) representing 2 states of the data in time. 1st state - backup from a couple days ago 2nd state - ...
1
vote
0answers
155 views

Relation between lossy decomposition and Natural join?

I am confused with the lossy decomposition and natural join. Natural join(with common attribute): only respective common attribute for the resultant table is formed. Lossy: Natural join on tables ...
3
votes
1answer
116 views

How many blocks is my database

How can I write a query using Oracle SQL Developer to find how many blocks my database is using? (tables & indexes)
1
vote
1answer
66 views

can I quickly create tables for each partition?

I have a table with two partitions and I would like to create two tables, one from each partition. Is there a quick way to do this (a la partition exchanges) instead of a create table as select ...
1
vote
1answer
154 views

numbering rows consecutively for a number of tables

I have a number of tables, all containing attributes aid,bid,cid, and xid of type integer, other attributes may differ. For every (given) table T, I would like to order the rows according to ...
4
votes
2answers
833 views

Why can't I view the SQL Server database created by a web application?

I have an ASP.NET MVC web application deployed to IIS on a Windows Server 2012 machine. When the application first starts, it will create the database and tables it needs if necessary through Entity ...
3
votes
0answers
51 views

How do i Optimize/Improve ram while running a massive import into sql server [duplicate]

I currently am importing a massive database of around 180 million records with roughly 300+ columns. I am sure you are all aware this takes a very long time. I am using sql server on a windows server ...
2
votes
1answer
747 views

SSIS execute task running wscript.exe hangs when started from SQL Server Agent

I have a problem with sql server 2012 SSIS package which has execute step running wscript.exe utility. When I run this package from BIDS everything works fine, when I start package from SSIS it also ...
13
votes
4answers
23k views

Why use WHERE 1 or WHERE 1=1?

Usually, if conditions are not required in our query statements, we don't use a WHERE clause. But I see a WHERE 1 clause being used in many places, even where other conditions are not present. Why ...
0
votes
1answer
313 views

MySQL: fetch multiple global status and system variable in a single query

When we execute SHOW global status; or SHOW variables; we get list of 291 and 278 records in the resultset. For performance perspective, only few of them are much important. I have to fetch these ...
1
vote
2answers
79 views

Recommended best practice for server naming [closed]

We're currently in the process of upgrading to SQL Server 2012, in the past all servers have been installed with a naming convention which contains a "-" in the middle i.e. TS-DBL01 I'm trying to ...
0
votes
0answers
143 views

How to represent group by in relational algebra

I have to plan a plan tree based on relational algebra.My question is that at some point I have a SORT ORDER BY the output of a join, so how do you represent group by in relational algebra.
1
vote
0answers
90 views

Query optimization, SQL Server cache query, SQL Server execution query

I have 2 queries, the results of their execution is the same, but I don't know which of these is the best in terms of performance and why. Query #1: SELECT CASE WHEN ( EXISTS (SELECT 1 AS [C1] ...
8
votes
3answers
601 views

“When a connection is closed and returned to the pool, the isolation level from the last SET TRANSACTION ISOLATION LEVEL statement is retained”?

The MSDN online article "Snapshot Isolation in SQL Server" states: "An isolation level has connection-wide scope, and once set for a connection with the SET TRANSACTION ISOLATION LEVEL statement, ...
4
votes
1answer
133 views

Why do row-versioning isolations use a linked list of versions of record? [closed]

Trying to better understand row-versioning based transaction isolations in SQL Server... According to Kimberly L. Tripp, Neal Graves's "SQL Server 2005 Row Versioning-Based Transaction Isolation": ...
6
votes
1answer
133 views

Does RCSI use less or same space than SNAPSHOT? Why?

Trying to better understand row-versioning based transaction isolations - RCSI (Read Committed Snapshot Isolation and SNAPSHOT) - in SQL Server... MSDN online article "Choosing Row Versioning-based ...
2
votes
1answer
294 views

sql script to export table's column data to another table's column

Let's say , I have two table with same schema but different data . Table_A and Table_B . Table_A -------- ID(p_key) Number(p_key) Column3 Column4 ...
1
vote
2answers
900 views

Mysql cluster fast inserts but slow selects

I have a mysql cluster with 3 Data Nodes and one SQL node. Curently I have 1million 1kb records. The inserts are very fast, takes only a few ms. But the selects are very slow >20s. All machines are ...
3
votes
1answer
1k views

verify that mongos server is connected to config servers

I've been writing a backup script for sharded replica-sets and it's almost done, except that I can't seem to get it to successfully start the balancer back up after everything's all said and done. ...
7
votes
1answer
699 views

Specific TempDB insert of UserDB select results in SOS_SCHEDULER_YIELD to ENCRYPTION_SCAN

One of our production systems has exhibited a problem with a single insertion statement into a temp table from our user database. When I comment out the insert/select, the stored proc in question runs ...
3
votes
1answer
3k views

Rights to execute stored procedure, but not read underlying tables directly

I have a stored procedure that contains lots of different columns from many different tables; I want to give 20 users access to the results of the stored procedure via Excel. Is it possible to make ...
8
votes
2answers
8k views

How do I identify the column(s) responsible for “String or binary data would be truncated.”

I am generating some queries automagically with code I wrote to SELECT from a remote Pg database, and insert into a local SQL Server database. However, one of them is generating this error: ...
2
votes
1answer
34 views

Automating MySQL DB Creation with Specific date

Here i come again with another challenge . Basically i'm looking forward for the best way to have a windows based script to create a MySQLDB, or multiple MySQLDB, once a week having the following ...
1
vote
1answer
2k views

MySQL Service is not starting on linux

I am having a problem with my database it does not want to start :( the server is running on linux centos 6.2 it was working until I emptied the logs I don't know if this have anything to do with ...
5
votes
1answer
1k views

Optimising a query against sys.fn_dblog

Looking for assistance improving a query. This query is used to review the last N transactions in the LDF file and then add some useful information like the user, start time, query text, etc.. Here ...
0
votes
1answer
133 views

Normalise an expenditure table in a budget database [closed]

We have a budget database that stores expenditure items per budget. There are over 100 expenditure items each having common attributes: Amount, Frequency, Comment. The table will have over 300 ...
1
vote
0answers
312 views

InnoDB: error: space object of table

131212 10:35:18 InnoDB: error: space object of table 'main/wp_m_membership_levels', InnoDB: space id 119 did not exist in memory. Retrying an open. 131212 10:35:18 InnoDB: error: space object of ...
1
vote
1answer
863 views

OEM 11g alerts and notifications arrive together

I setup the OEM with the Idea to receive Critical messages (emails when the DB, listener, agents and host are down/up) but it doesn't seem to be working. If I "shutdown abort" the database I wont ...

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