0
votes
0answers
189 views

Decimal Data Type as Primary Key

One of my tables is set up like this: create table dbo.Source ( testID decimal (10,3) PRIMARY KEY , column 2 somedatatype , column 3 somedatatype ) Whenever I perform SSIS into this table ...
2
votes
0answers
70 views

Alwayson Database Recovery Failure during TDE encryption

Last week I enabled TDE encryption on my AlwaysOn Availability Group databases of SQL Server 2012. During the encryption of one of the larger databases, bigDB (~200gb) a failover event occurred. Of ...
13
votes
2answers
3k views

Changing a column from NOT NULL to NULL - What's going on under the hood?

We have a table with 2.3B rows in it. We'd like to change a column from NOT NULL to NULL. The column is contained in one index (not the clustered or PK index). The data type isn't changing (it's an ...
12
votes
2answers
614 views

Crashing CLR on SQL Server 2014 (windows 2012R2)

I have this small CLR that does a RegEX function on a string in columns. When running on SQL Server 2014 (12.0.2000) on Windows Server 2012R2 the process crashes with Msg 0, Level 11, State 0, ...
1
vote
3answers
1k views

How to restore mdf file in sql server 2005?

I have a .MDF file and no .LDF files for a database created in SQL Server 2005. When I try to attach the .MDF file to a different SQL Server, I get the following error message. I would like to ...
0
votes
1answer
232 views

Why does Informatica hang and say “Not Responding” when connecting to ODBC Data Source

Informatica just hangs when trying to open this dialog. The ODBC connection exists in Control Panel > Administrative Tools > ODBC Data Sources. Source Analyzer > Sources (menu) > Import from ...
0
votes
0answers
266 views

Performance hits with MySQL Left Joins and Order By

There are a lot of questions out there regarding this issue, but most answers seem to be very case-specific. I've tried to make this general so it'll help others too. The Issue We have a smallish ...
0
votes
0answers
447 views

WHENEVER OSERROR suppresses error messages

$ sqlplus <connstring> 2>&1 <<! WHENEVER SQLERROR EXIT FAILURE ROLLBACK; WHENEVER OSERROR EXIT FAILURE ROLLBACK; SET ECHO ON; @nonex.sql; ! Produces SQL*Plus: Release 11.2.0.1.0 ...
0
votes
2answers
164 views

how to GRANT EXECUTE on MySQL

I updated the timezone on an AWS MySql instance, and tech support told me I also had to runt his command for each MySql user: GRANT EXECUTE ON PyupROCEDURE `mysql`.`store_time_zone` TO ...
0
votes
0answers
203 views

Hide Inconsequential Result Sets From Stored Proc

How does one mask resultsets in multi-layered stored proc calls? Due to stored proc reuse, I have an issue where a top level stored procedure calls multiple stored procedures (directly) and in-tern ...
0
votes
1answer
27 views

Mysql Adding date/time stamp to file produced, or other method of automated file naming to keep resulting files unique

SELECT '"Part #"', '"Manu"', '"Qty"', '"partdesc"', '"Rohs status"' UNION all ( SELECT partno, manuf, qtyleft, partdesc, stfifo.ROHScompliance FROM stmaster, stfifo WHERE ...
1
vote
1answer
64 views

Name for intermediate aggregated data [closed]

We have raw data and aggregated data as well as sometimes multiple levels of aggregation between. Is there a name for the data in that intermediate "state" of aggregation? Just like how we have Real ...
1
vote
1answer
88 views

Can't enable binary logging (“index not found”)

I have a MySQL 5.5.41 server running on Ubuntu 14.04 that already contains several databases of data, and I would like to enable binary logging. I want the binary logs to be placed in their own ...
0
votes
2answers
171 views

Sudden Slow Reports [closed]

we have reports on our report server that are running slow all of a sudden. They were working fine and then all of a sudden over the weekend they started to process incredibly slow. It appears that ...
1
vote
1answer
337 views

Log Shipping -Monitor Server Down - Copying happening but not restoring on secondary

I have set up a few log shipping instances, but I am not a DBA. This weekend something happened for the first time - the log shipping Monitor Server went down temporarily due to electrical issues ...
1
vote
1answer
24 views

Table for actual values

I have a database where logging happens and is processed in a data-warehouse styled environment. This means there are staging cycles where the data comes in and then is processed. For a reporting ...
1
vote
1answer
171 views

Percona MySQL 5.6 databases ignoring key length at constrait creation

We have a 3 servers running Percona MySQL 5.6 in a Master/Master configuration that are all reporting errors on key length, either too long or not specified. The structure of the databases is all ...
1
vote
2answers
404 views

MySQL error 1593 on replication between 5.0.92 and 5.5.42

I'm migrating a server to new hardware and trying to set up replication to keep the site current until we switch DNS. The intention is to enable two way replication to make sure that the servers stay ...
0
votes
0answers
164 views

How to reduce connection usage,Traffic and No of mysql queries in a mysql server?

The problem i am facing is that sometimes the connection usage goes up to 100% and all services are stopped.what are the changes that can be done on Mysql server side to solve this problem? No of ...
2
votes
0answers
61 views

Update a Record in Cassandra

I'm having the following query while updating a particular record. I've a user Column Family CF as follow:- class User(Model): user_id = UUID(default=uuid.uuid4,primary_key= True) date = ...
1
vote
0answers
59 views

Can a slow SELECT statement in READ COMMITTED isolation level read content from concurrent committed UPDATE?

Let's say we have a big table with hundreds of million of rows (or more). On one connection, we perform a query requiring full table scan under READ COMMITTED isolation level: SELECT * FROM ...
0
votes
2answers
41 views

insert multiple depend on prev queries

I need to insert multiple records into a table. The number of records depend on the result of another query. For example:I want to insert booking detail depend on number of room customer choose. If ...
0
votes
1answer
3k views

SQL Server : execute stored procedure from another stored procedure

I have two stored procedures. Proc1 executes a SQL statement and results a data table as a result set. I need to use the datatable in a select SQL that resides in proc2 as a datasource. like, ...
0
votes
1answer
70 views

MySQL: Updating or closing existing rows in a table and/or inserting new rows?

I want to update a specific table but in the following manner. When a record is completely the same (so not only the primary key, but all fields) then I don't want any changes (or a new record ...
0
votes
1answer
75 views

Operating system disaster recovery strategies

I have read a lot about disaster recovery planning of databases (mainly SQL Server). There are multiple articles/book chapters about backing up databases and recovering them from backup. But what if ...
0
votes
1answer
587 views

How to split a MySQL table file?

I have a table in a MySQL database for which innodb_file_per_table is enabled. One of my tables is about 20GB and growing. How can I partition the table into separate files? Suppose that I have a ...
0
votes
1answer
55 views

Migrate MySQL 3.23 Data

I have .FRM, .MYD and .MYI files from a MySQL (version 3.23 I think) database from back in the early 2000's. I managed to get the files into a Windows installation of 3.23 and then dump it, however I ...
1
vote
1answer
5k views

How to get the return value from a stored procedure executed with sp_executesql

I need to call a stored procedure in another database and check the return value. The name of the other database can vary so I'm trying to use sp_executesql, but I haven't been able to find how to get ...
1
vote
1answer
202 views

Proper way to store a password within a SQL Server agent job

I know this is a stupid idea, but I'm having a hard time finding a better solution right now. I need to execute several sql stored procedures on a daily basis, then execute a powershell script to ...
7
votes
1answer
1k views

SQL Server 2014 - Reset everything

Short of reinstalling the software, is there a simple way to 'start from scratch' with a SQL instance? By that I mean: Remove all created logons, Remove all added databases, Reset system databases, ...
0
votes
1answer
126 views

Clustered Index Update

I am trying to understand why is my query (update statement) causing clustered index update in the plan? Based on my clustered index (in the where clause), I am just updating columns in my table. What ...
1
vote
0answers
48 views

tempdb contention issue and excessive pagewrites/s

Still removing the rust from my SQL Server skills, so please bear with some stupid questions here and there... Customer has a SQL Server 2008 R2 running in an Azure VM with 8 cores and 14GB RAM. ...
0
votes
2answers
208 views

mysql select count on same table slow subquery

I've a small table which contains a call log history. Now I want to make a report from this, so I have to find the number of outgoing and incoming calls. Company has a few extenstions ranging from ...
16
votes
1answer
1k views

What exactly can SQL Server 2014 execute in batch mode?

When a columnstore index is being used in a query SQL Server is able to use batch mode. Documentation is thin on what can run in batch mode and what can't. Please look at the following (motivating) ...
1
vote
0answers
138 views

what are best practices to setup mariadb galera 10.0 on shared nfs storage (emc vnx) [closed]

As the subject states, I'm interested in setting up a MariaDB Galera cluster, using a shared nfs storage to host the db data. I've searched but couldn't find any resources with "best practices" for ...
0
votes
0answers
141 views

How to downgrade Oracle Database from 11gr2 to 10g?

In certain situation i have to downgrade from 11gr2 to 10g but coudn't find right way to downgrade. Can you please give a right direction and possible causes to Database.!
0
votes
1answer
35 views

Are file locations stored in PostreSQL catalog?

I am trying to learn a bit of PostgreSQL, and I am currently trying to understand the catalog. I think that if it stores all the metadata of the DB, should it also store things like the file ...
0
votes
0answers
39 views

How can I record previous data when they are updated in a table?

I would like to record all previous addresses and postcodes in my "Audit" table when they are updated in the "Customer" table. I'd like to record a primary key column, user, date of update, customer ...
1
vote
0answers
55 views

DBCC SHRINKFILE (N'XYZ' , EMPTYFILE) using single core

Is there any way to force DBCC SHRINKFILE to use more than one core? We're running SQL Server 2014 on a hex core machine - and SHRINKFILE is using one hyper threaded core. I/O is at a small fraction ...
1
vote
1answer
17 views

Groups relationships - Detailed or Direct?

I have a Person model: PersonId Name ----------- ---------------- 1 Jessica 2 Jennifer Then I have a ShareModel which have the Personand an ...
1
vote
1answer
62 views

Elegant Database Design

I'm trying to make "online Judge Environment"(like SPOJ). In which users have facility to see their past submissions for each question, their best code performance(like running time, if they succeed ...
0
votes
1answer
57 views

Oracle: How to AUTOTRACE in my program

You can display the results of EXPLAIN PLAN with explain plan for select * from foo; select * from table(dbms_xplan.display); How can I similarly display the results for an AUTOTRACE in my program? ...
0
votes
1answer
48 views

MySQL 2 Million Rows, longtext and varchar indexes

I'm trying to find a solution for this, with no success. I have a table with ~2M rows, and I need to do a WHERE with 3 expressions using OR. name LIKE '%PARAM%' OR text1 LIKE '%PARAM%' OR text2 LIKE ...
0
votes
1answer
100 views

Oracle: Am I on a RAC?

What query can I perform to determine if I am running on a RAC system? If I'm on a RAC, I need to query from GV$* rather than V$*.
0
votes
0answers
100 views

New Table vs Java Beans to allow user to dynamically change data representation?

I am building a database to store the assessment records of students, along with other relevant information and functionality like reporting on average scores etc. Currently my company uses Excel for ...
1
vote
1answer
65 views

Oracle: guaranteeing unmodified database state with queries?

If the first word of a SQL statement is either WITH or SELECT, is the statement guaranteed not to change the state of the database? i.e. is this loop "safe"? read SQL string if string begins with ...
1
vote
0answers
322 views

Amazon Redshift: “*SELECT* 1” vs. volt_dt_0 vs. volt_tt_51343b6aa3bd4

I've noticed subqueries in Amazon Redshift can be represented in the explain plan in 3 separate ways: -> XN Subquery Scan "*SELECT* 1" -> XN Subquery Scan volt_dt_0 -> XN Seq Scan on ...
1
vote
1answer
87 views

Cursor Performance in New Server

I bought a new server with spec : HP ProLiant ML310e Gen8 v2 8 GB Single Memory, Intel Xeon E3-1220v3 3,1 GHz, 500 GB SATA 7.5K RPM, Windows Server 2012 R2 x64, SQL Server Standard 2014 x64, RAID 0 ...
0
votes
1answer
66 views

Query across schemas in PostgreSQL [closed]

In PostgreSQL, I have a table which, due to sharding, exists across many schemas. In sub-optimal cases, I need to execute a query on all of these schemas (due to an exception which violates the ...
1
vote
1answer
228 views

Installing PostgreSQL and PostGis on Mac OS X

I downloaded and installed PostgreSQL and PostGis from http://www.kyngchaos.com/software/postgres, I work on OS X 10.10. When I go into the terminal now and type psql it says -bash: psql: command ...

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