1
vote
0answers
726 views

SQL Server: Principal DB becomes unavailable after problem with mirror DB, even with Set Partner Safety Off?

We've got a very simple mirroring setup here: just a principal DB and mirror DB, no witness, running in high-performance mode with SET PARTNER SAFETY OFF. This problem has happened to us twice now: ...
4
votes
2answers
226 views

removal of GUIDS used for all PK's, FKs & Clustered indexes

Inherited control over a database that has this nasty config. It also has large sections of code generated by NHibernate, including the gneeration of GUIDs before they get to the db so no chance of ...
1
vote
5answers
138 views

More efficient way to write multiple “AND”?

Anyone know a way to write this in a different manner ? SELECT tableA.NO FROM tableA WHERE tableA.NO IN (SELECT GRI_NO FROM tableBB WHERE GRO_NO =62) AND tableA.NO IN (SELECT GRI_NO FROM tableBB ...
0
votes
1answer
75 views

MongoDB replication to local hard drive

MonogDB's dynamic schema has made me thinking about replacing MySQL. I eventually want to use MongoDB as the default for all new app developments. But this project runs on only 1 dedicated server (...
4
votes
1answer
573 views

Two different databases on the same RAC cluster

We have an Oracle 11gR2 RAC cluster with 4 nodes. 2 nodes are dedicated to one database that's devoted one application and 2 nodes are dedicated to a completely separate database that serves a ...
1
vote
2answers
185 views

Is column order reliable in UPDATE?

Can we reply on the order of columns in an UPDATE? SET @x = 0 UPDATE table1 SET col1=IF(col1 IS NULL, NULL, @x:=@x+col1), col2=IF(col2 IS NULL, NULL, @x:=@x+col2), col3=IF(col3 IS NULL, NULL, @x:=0) ...
1
vote
2answers
7k views

Select all data group by 1 column and functioned by another

I have the following table in SQL Server 2012 : ID int priority int type int other data columns I want to query the table for the following result : grouped by 'type' get the id of top 1 max ...
2
votes
2answers
618 views

Reducing deadlocks with update query hint or other method

I'm getting 20-30 deadlocks per day on the same table. (2 mil rows) Profiler DeadlockGraphs show KEY LOCK and PAGE LOCK (See attched jpg) Total datatype size per row = 114 bytes We have multiple ...
0
votes
1answer
3k views

Get memory usage of mysql query during runtime

Is possible to obtain used memory in a running query? Something like: mysql> SELECT MEMORY_PEAK as memory; #return memory usage by mysql before run query mysql> SELECT id FROM table WHERE id&...
2
votes
1answer
49k views

Float datatype with 2 digits after decimal point

In SQL server float datatype does not display trailing zeros after decimal point declare @num as float set @num=5.20 select @num will dispaly only 5.2 But i want it to display as 5.20 After a ...
2
votes
1answer
4k views

Delete data from huge InnoDB table from MySQL Master and Slaves

We have some huge tables in MySQL database, We have already archived/deleted data older than 2012 in 2013, Now we need to archive/delete data older than 2013 means we need to archive data for year ...
2
votes
1answer
107 views

MySQL : Till when MySQL retains binary logs?

I have multiple queries : Till when does MySQL retain the binary logs ? What is the default setting ? When does it start logging ? What does the number of the binary log file name suggest for ...
5
votes
1answer
7k views

Using a linked server with OPENQUERY in a database project

I have a SQL Server 2008 running a database I want to throw in TFS. Therefore I used a Visual Studio 2013 database project where I imported the DB. After fixing a bunch of errors I'm stuck with only ...
0
votes
0answers
30 views

MySQL: why provide size of a datatype in table definition? [duplicate]

Below is an example table definition: CREATE TABLE IF NOT EXISTS `mytable` ( `id` MEDIUMINT(5) NOT NULL AUTO_INCREMENT, `title` varchar(255) DEFAULT NULL DEFAULT '', `content` text ...
10
votes
5answers
33k views

“Can't find file mysql/plugin.frm” when starting up MySQL

When I start my MySQL server, I get this error: /usr/libexec/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13) [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create ...
2
votes
1answer
1k views

Running parallel delete statements

Problem: I have a massive table - occupies a whopping 9.5 TBs. I need to delete around 5 mil rows from it. The best method I have come up with deletes 1 million records in 2 hours! Since I can not run ...
1
vote
0answers
34 views

SQL Replication - Data not showing

Good Morning, I have recently setup SQL replication and changed some data in one of the tables on the primary table. This data however has not been replicated to the subscription server. On the ...
3
votes
3answers
903 views

ALTER TABLE SWITCH fails with indexed view

I'm having issues with ALTER TABLE SWITCH between a staging table and a target table which is schema-bound to an indexed view. When I issue the SWITCH statement, e.g ALTER TABLE dbo....
1
vote
1answer
607 views

How can I find out if any cluster member is offline in mongodb cluster?

I have a mongodb cluster with 1 master machine(running mongos and config service) and 3 slave machines(used as data store).But now,I find that one of 3 machines (192.168.10.11) is down because I can ...
1
vote
1answer
5k views

column auto updated after 24 hours in mysql

i have a table T1 with column : Name State time mon 1 2014-01-09 11:23:00 tue 0 2014-01-07 14:40:00 wed 2 2014-01-08 09:23:00 thu ...
3
votes
0answers
889 views

General access denied error while using import data in SSMS [closed]

I am using SQL Server Management Studio with the following version information below: Microsoft SQL Server Management Studio 10.50.4000.0 Microsoft Data Access Components (MDAC) ...
0
votes
1answer
53 views

Retrieve column info from next column

I have a query that is working but I figure I could enlist some help to make it more efficient. However before I show the query I would like to get a few answer on how others would do this. What the ...
1
vote
1answer
483 views

Slow running query with inner SELECT in where clause

I have a query that looks like the following: USE DATABASE3; GO SELECT t1.COL1 AS COLUMN1, t2.COL2 AS COLUMN2, t1.COL3, t1.COL4 AS COLUMN4, t1.COL5 AS COLUMN5, t1....
1
vote
1answer
418 views

Why is the System tablespace in manual segment space management mode?

Why has Oracle kept the SYSTEM tablespace in manual segment space management mode? I searched on forums but didn't find the answer.
1
vote
1answer
68 views

Can I edit single timestamp so it recalculate all the following timestamps in a table?

If I have a table with a list of tasks with time stamps (start_time and end_time) and minutes of duration, can I change the minutes in one records so it effect and recalculate all the other timestamps ...
2
votes
1answer
519 views

Firebird database recovery and protection

I'm sure many companies are running critical Firebird database servers in production 24/7. Other than regular backups, what backup/recovery/protection techniques are available? I am also interested in ...
2
votes
2answers
138 views

Similar Products with bitwise

I have the following tables. So one product can have one category, one category can have n genres.(Products-> Genre Column data 6 ( 2 + 4), 132 (128 + 4) like that). So my question is; i want to ...
1
vote
1answer
231 views

How to do two actions in conditional UPDATE?

In a query as SET @x = 1 UPDATE table1 SET col2 = IF(col1 = 'y', @x:=0, @x:=@x+1) Every time reaching the value of y in col1, I want to SET the @x:=@x+1 and after that reset the x to 0. In other ...
4
votes
1answer
327 views

Why am I getting blocked when I call OBJECT_NAME(object_id, database_id) from sys.dm_tran_locks?

I'm working on a query to tell what objects have locks from a given session and I'm running into some blocking issues. Here is my basic query: SELECT request_session_id AS session_id, ...
1
vote
3answers
945 views

Trouble with SQL Server authentication in SQL Server 2012

I am working with a SQL Server 2012 database. I am able to log into the server using Windows authentication. Although I have the SQL Server authentication username and password which is provided to me ...
3
votes
4answers
5k views

Update column with the sum of column in previous rows in MySQL

We have a table, essentially: id, amount, end balance, account_id I now want to re-calculate the end balance values (because of possible corruption) End balance is basically "end balance of ...
10
votes
3answers
6k views

VACUUM FREEZE vs. VACUUM FULL

Can someone explain the difference between these types of VACUUM in PostgreSQL? I read the doc but it just says that FULL locks the tables and FREEZE "freezes" the tuples. I think that's the same. Am ...
1
vote
2answers
4k views

How can I change the connection descriptor used by Oracle Enterprise Manager?

I've recently changed the SERVICE_NAME of my 11g database and Enterprise Manager can no longer connect to it: 2014-01-08 10:36:06,047 [HTTPThreadGroup-3] ERROR eml.OMSHandshake processFailure....
2
votes
1answer
3k views

How to use LOW_PRIORITY for heavy queries?

I have scheduled heavy UPDATE queries at administrator level, and since they are heavy UPDATEs with multiple JOINs, consume a huge amount of resources. I do not want them to stop end users from ...
2
votes
1answer
80 views

Log File over 400gigs…need to bring this database back to life

I'm not a dba so I don't understand the admin side of SQL Server too much. One of our sharepoint instances blew up and our IT staff asked if I could assist bring it back to life. I found backups for ...
2
votes
2answers
70 views

What is the purpose of BACKUP WITH NAME?

I looked at the Microsoft documentation (http://technet.microsoft.com/en-us/library/ms186865.aspx) and see that there is a WITH NAME option for backups. But it's not the name of the file (I specify ...
1
vote
1answer
61 views

Do the showplan (any or all) events add more overhead than a tuning trace should have

How long (order of magnitude) do the various showplan events take to record? Also is the time these events require counted as part of the "duration" column of the corresponding SQL query?
3
votes
1answer
135 views

Log Shipping in lieu of replication

I have two SQL Server 2008 R2 systems that, due to network restrictions, cannot use SQL Server replication. However, data needs to be shared between these systems. It may be possible to send a file ...
2
votes
3answers
6k views

MySQL:How to correct a corrupted MySQL binary log on Master server?

We are using MySQL DB with one master and one slave. We are using this setup for months now. The slave sync stopped today and the error we got was: Last_IO_Errno: 1236 Last_IO_Error: Got ...
2
votes
1answer
678 views

SQL Server TDE stuck encryption state 4

I'm trying to create a robust script that runs backups, backs up current certificate, creates a new certificate, backs up new certificate and regenerates database encryption keys with the new ...
1
vote
0answers
156 views

MySQL SSL Master-Slave replication not syncing

I have originally posted this thread on stackoverflow and after a comment I moved it here. The original post can be found here. I have setup a typical Master-Slave replication scheme for my MySQL ...
3
votes
3answers
2k views

MySQL query extremely slow after server restart

I am managing a very large database for a custom application I wrote to keep track of visitors. The DB server was rebooted for the first time in over a year - not even to install any updates, but ...
0
votes
1answer
4k views

ORA-01410: invalid ROWID

I get ORA-01410: Invalid ROWID error when executing the following piece of code: DECLARE CURSOR c1 IS SELECT e.empno, e.ename, e.sal, d.dname ...
0
votes
1answer
57 views

Does disk errors on a mongo primary instance trigger election process?

On the MongoDB site here states that a elections occurs when primary becomes unavailable. What happens if there is a disk read/write error on the primary node? Does heartbeat check covers disk health, ...
1
vote
1answer
2k views

How to separate MongoDB journal

I'm trying to use NFS as db path for my MongoDB (which I read is not recommended, but a client demands it that way) and I'm having trouble separating the journal files. How would I do that? I've ...
0
votes
1answer
69 views

Database Designing Issue

I have a database having Millions of records in three tables. Now i want to split these three tables in multiple tables to reduce redundancy and data duplication. A lot of records(Persons) have ...
3
votes
2answers
3k views

How to grant permission to new user created in mysql?

I want to create new user and want to give them specific permission like inset, update and delete. But how to create new user and give them permission i don't know. Any help please.
0
votes
1answer
74 views

Updating Document in MongoDB without Alphabetically order

I am making one project on MongoDB and inserted some documents and now i am updating the documents by this code.. bson_init( query ); bson_append_string(query, "First", "A"); bson_append_string(...
3
votes
2answers
22k views

RMAN list archivelogs that are needed for to recover specified backup

I've taken backup of datafiles in 31.12.2013. It completed datafile backups successfully, but archivelog backups failed. Now, I want to determine what archivelogs should I backup to be sure that my ...
2
votes
1answer
6k views

UPDATE a column by COUNT of another table

It might be a naive question, but what is the difference of these two queries and which is preferred? UPDATE table1, (SELECT id,COUNT(*) idcount FROM table2 GROUP BY id) AS B SET table1.Freq = B....

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