1
vote
0answers
10 views

Column Data Type for Bitwise Comparison?

I have a table where I have an int32 column storing values for bitwise comparison. I've ran out int space with a int32. I can convert to int64 but that will just prolong the inevitable. Is there an ...
1
vote
0answers
8 views

What could cause waiting for table metadata lock?

I am using a MySQL 5.6 DB with MyISAM tables under FreeBSD 8.3. The main part of code is in PHP, but the problem arises, when I launch the self-written on C++ chat-server. I use the mysql.h for DB ...
2
votes
1answer
14 views

Is support for Parallel Scalar UDF a reasonable feature request?

It is fairly well documented that scalar UDF's force an overall serial plan. Running functions in parallel Given a large number of rows coming into a point in the pipeline where a UDF must be ...
0
votes
0answers
3 views
2
votes
1answer
8 views

Performance impact of Extended Events filter [like_i_sql_unicode_string]

I have created an extended events session in which I wanted to see all queries using nolock hint. I have decided to use it instead of sql trace in order to minimaze possible performance impact. ...
0
votes
0answers
2 views

PostgreSQL - If I run multiple queries concurrently, under what circumstances would I see a speedup? Under what circumstances would I see a slowdown?

I approach you all humbly as one who is NOT a DBA, and I'm sure that my question is fraught with conceptual shortcomings and "it depends on" land mines. I'm also pretty sure that all of you who ...
2
votes
5answers
33 views

Estimate projected database growth

I recently started working with SQL Server 2008 as a DBA trainee. I need calculate the size of the database but also estimate its growth over recent months and the predicted growth for the next 12 ...
0
votes
2answers
11 views

On reboot listeners don't start but restarting the service after will start them

when I reboot ubuntu the listener service comes up but it doesn't seem to have any listeners lsnrctl status LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 24-JUL-2014 15:34:43 Copyright (c) ...
0
votes
0answers
9 views

Derive daily delta from total daily counts? Tsql

I have a table: ID, tableName, totalRowCount, Date Each day I'm appending the number of rows in the relevant table. What I want to do is create a table which has the number of new rows created on ...
2
votes
3answers
28 views

Should I shrink my database?

I have a 1.2Tb SQL Server 2008 R2 database which is more than 50% empty, because I migrated a lot of functionality to PostgreSql. The database is still in use, and still somewhat growing, but I do not ...
0
votes
0answers
7 views

Nested cursors, multiple result sets

I'm using a SQL Server stored procedure to generate an Excel report. Basically each "entry" in the report has three parts: Object, Observation, and Points. The observations have a reference to the ...
0
votes
1answer
13 views

How to change schema so that account_id reference is unique among 3 tables

I am designing a (PostgreSQL) schema for a lottery website that uses double-entry accounting. 'jackpots', 'users', and 'house' are each tables which reference an account_id, which in turn is used ...
2
votes
2answers
37 views

Are we a good fit for SQL Server Enterprise and table partitioning?

We currently have a production database that contains millions of records (14 million in the largest table). One function of the database is to provide time sheet information so a single table could ...
0
votes
0answers
8 views

Postgresql. security definer wrapper function is slow

I have a strange behavior of wrapper function with SECURITY DEFINER option. Function 1 - Queries data what is not directly accessible by user. Function 2 - Is a wrapper that calls function 1 with no ...
0
votes
0answers
13 views

How can I decrease FULLTEXT initialization time?

I'm trying to decrease execution time of the a query. Using SHOW PROFILE, FULLTEXT initialization takes about 0.3, which is too high. Other values are at normal level. How can I decrease FULLTEXT ...
0
votes
0answers
7 views

Database design for tracking referral dollars and referred dollars

Dropbox has a great referral incentive program that gives a storage bonus based on whether a person is referred to Dropbox or refers others to Dropbox. What data base design is good for managing ...
1
vote
1answer
16 views

How to handle multiple hierarchies in a data model?

In Sql Server, there is a datatype called HIERARCHYID which helps with hierarchies. In our environment, we have patient data that needs to be classified under multiple hierarchies. Example 1: ...
1
vote
2answers
18 views

How to verify that a certain commit has been transmitted to standby

Scenario: Oracle Data guard 12c with 1 primary and 1 standby, Max. Av. protection mode Primary open, standby mounted (all green in OEM) Perform a dummy CTAS in primary Question: Without opening ...
3
votes
1answer
40 views

Splitting a csv column from select query into multiple columns

I have a stored procedure SELECT [ShipWorks].[dbo].[OrderItem].[Code] AS Code, CASE WHEN (LEN(ISNULL(MAX([ShipWorks].[dbo].[OrderItem].[Location]),'')) = 1) THEN ...
1
vote
0answers
5 views

Can I automate data pulling from VistA databases using MUMPS?

I apologize if this is on the wrong StackExchange website. This seemed to make the most sense because it's a database question and there's no longer a Healthcare IT site. I'm an intern at the VA ...
2
votes
0answers
9 views

Sql Server data files in Windows Azure

excuse me for my bad english I just created a database using the new functionality "SQL Server 2014 data files on Windows Azure" and works quite well, however, I have a table with a Billion records, ...
0
votes
0answers
8 views

Export sql server table connections schema

i am using RazorSQL to connect to a Microsoft SQL Server database. I am looking for a way to visualize the tables connections schema. Do you have any idea how I can export such a view?
1
vote
2answers
14 views

best way to deal with imperfect xls source file that needs to be imported into SQL via SSIS

The data is formatted like this: Date Type Account 1/1/14 AAA 111 112 113 BBB 114 115 ...
3
votes
3answers
409 views

How do I place leading zeros for numbers less than 10 without affecting those 10+?

Probably a newb question, but... I have a table with a VARCHAR field containing numbers 1 through 300. I need to place a leading zero in front of any numbers less than 10 while retaining the original ...
0
votes
1answer
22 views

Getting null block_st.text when querying for blocks

We are using the blocking query from this article which queries sys.dm_tran_locks. http://simplesqlserver.com/2013/05/21/blocking-capturing-and-monitoring/ The issue we've ran into is that often ...
1
vote
1answer
45 views

Restore Verify Only w/ Transaction Log Backups

Question When RESTORE VERIFY ONLY on a transaction log backup fails, what do you do? Background After FULL and DIFFERENTIAL backups, I run RESTORE VERIFY ONLY on the backup file(s). This rarely ever ...
1
vote
0answers
27 views

How can I normalize and optimize this database before I build it?

I was just given the project of creating a database to store and access information that the various engineers involved in design and manufacturing can use to create updated instructions and load ...
0
votes
3answers
25 views

Excel - How can I use a SQL query to retrieve data on a database sever?

I have connected to a SQL server in Excel . I want to be able to import data from a table located on the server. However this table is too big to import into Excel, I'm talking millions of rows. I ...
0
votes
1answer
21 views

How to construct a set-based query for subset problem?

I have a DB of the following structure (picture shows simplified version) How should I construct a query to get only those recipees, that can be cooked, i.e. for each ingredient in a receipe ...
1
vote
0answers
11 views

postgres - generating documents for full text search taking forever and eating up disk space

We use PostgreSQL and Django-Haystack with Elasticsearch for search on our service, and were thinking of switching to Postgres's built in full text search because of various annoyances using a NoSQL ...
0
votes
1answer
20 views

MySQL read/write ratio from information_schema.GLOBAL_STATUS

Could you please help me to construct a query to sum specific rows from a table, basically desired output is: +-----------------+----------------+ | Total reads | Total writes | ...
0
votes
1answer
24 views

How to find n consecutive numbers in MySql

I have numbers starting from 1 to 50 and then 90 to 200 in my database and I want to fetch 100 consecutive numbers then the result should be 90 to 189. Records in my table are more than 10 million.
1
vote
2answers
64 views

SQL 2008 Server - performance loss possibly connected with a very large table

Migrated from http://serverfault.com/questions/615129/sql-2008-server-performance-loss-possibly-connected-with-a-very-large-table We have SQL Server 2008 with 3 active databases running on it. DB1 ...
0
votes
1answer
17 views

Extracting the maximum of several subsets and join all maximums in a new table

I have a big table: What I need is to obtain the maximum value for each testname, with different entry and get a new table such as: And then I want to compute the maximum, the minimum and the ...
1
vote
0answers
20 views

Should one always VACUUM ANALYZE before REINDEXing in PostgreSQL 8.4?

Early in the morning every day a pgAgent job refreshes the contents of table A from table B on my PostgreSQL 8.4 database. Table A contains around 140k records across 91 columns and has two indexes - ...
1
vote
2answers
32 views

Optimize rows to columns conversion

I have a big Oracle table (around 40 million rows) that looks like this: ID Name Question Answer Reason 3 Name1 1 Yes blah blah 3 Name1 2 No NA 3 Name1 3 ...
0
votes
1answer
18 views

It is mandatory to create a route when creating an event notification?

I'm starting with service broker. Already managed to setup an event notification for blocked processes based on this answer and it's working flawlessly. Then I wanted to setup another one to notify ...
0
votes
0answers
18 views

It shows error in “WHERE pk.remarks = 'free'” can you give me any suggestion? [on hold]

CREATE VIEW viewinstallinfo AS SELECT i.installid, i.customerid, i.username, iu.internetpassword, i.installdate, i.installmiti, i.billdate, i.billmiti, i.entrydate, i.entrymiti, i.billno, ...
0
votes
1answer
25 views

Why is my Mysql Query verry slow when selecting a text field

i have a problem with a left join. Tables are myisam. Tables CREATE TABLE `article` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `force_startpage` tinyint(1) DEFAULT '0', `title` varchar(255) ...
0
votes
0answers
22 views

amazon small instance mysql query too slow

I have mysql database with 1.5 millions records with 2 million categories records. when i do query on categories and city where clause it takes 304989 milliseconds. on localhost it too fast. i tried ...
2
votes
1answer
31 views

difference between index REBUILD and REORGANIZE in relation to recompile in SQL Server 2008 R2

Does the INDEX REORGANIZE index cause recompilation of the stored procs the same way as INDEX REBUILD
0
votes
1answer
15 views

pt-table-sync for 3 master servers

We had a mysql multi master with 3 nodes and unfortunately the replication broke. We have some set of tables which has to be in sync with other database servers, so i was looking into Percona-Toolkit ...
0
votes
0answers
10 views

Custom personal monitor sql by writing the .psqlrc file

I want to custom my personaly monitor sql by writing the .psqlrc file , but I encounter some problems . --tablespace skypcsuit=> \db List of tablespaces Name ...
0
votes
0answers
5 views

The OLE DB provider “Microsoft.Jet.OLEDB.4.0” has not been registered

I am getting the error as follows : The OLE DB provider "Microsoft.Jet.OLEDB.4.0" has not been registered. I try it on google .I have install AccessDatabaseEngine.exe but no use it is used for 64 ...
2
votes
1answer
45 views

Implementing application locks within SQL Server (Distributed Locking Pattern)

In my application I have to perform a distributed locking pattern. Because we already have an instance of SQL Server to use, we decided that it would be easiest to implement the locking at SQL layer ...
0
votes
3answers
40 views

How to display posted on date and time like1 hr ago or 30 min ago

i want to show the posted date like 1 hr ago.. or 30 min ago.. declare @date datetime ='2014-07-24 11:50:22.033'; SELECT CASE WHEN DATEPART(DD,@date)=DATEPART(DD,GETDATE()) THEN CASE WHEN ...
1
vote
0answers
15 views

Merge/combine two queries with different dates

I have one query that runs a SUM statement based on daterange 1, and worked fine, and another query that run same SUM statement, but on a different date range. I would like to merge/combine the two ...
1
vote
1answer
17 views

MySQL crashes frequently on a Windows server

I have been facing an issue with MySQL crashes since last week. I don't know what exactly is happening. When I look at the Windows logs, I see the following error message: Faulting application name: ...
0
votes
1answer
24 views

Query to join three tables

I have three tables which I have to join. I'm not a good SQL writer. Can please sombody help me to prepare this using joins: branches ----------------------------------------- branch_id | branch_name ...
0
votes
1answer
19 views

SQL Server NULL values UNDO

I mistakenly updated the null values in my table to a string similar to an already present string. For e.g. I changed the NULL values to 'WL:5' and there were records for 'WL:5' already present. I ...

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