5
votes
2answers
519 views

Performance hit of CONVERT from nvarchar to money (SQL Server)

I have a dollar amount value, that for historical reasons has always just been stored in an nvarchar field. Now that we are storing many more rows than we have in the past, and are using this field to ...
2
votes
2answers
218 views

How do I safely drop a list of tables, when i have the table names listed in a column?

Assuming I have a database column containing table names, how do I safely delete all of the tables it lists? The tables themselves are fairly simple - they may have indeces, but definitely don't ...
3
votes
0answers
49 views

Update+Select in one SQL Server transaction, and concurrent deadlocks [duplicate]

I have a problem with a transaction isolation or concurrent atomic select+update. SQL Server, C++ application, OTL/ODBC, and I can't use any stored procedures. Here is the thing. The task is to ...
4
votes
2answers
535 views

Wildcard for table permissions

I want to grant a user permission to select,insert,update,delete on a few tables in the prod database. However, I find it time consuming to write each grant statement out per table. Is it possible to ...
0
votes
0answers
28 views

How can I determine the performance (rows/second) for a certain query on one of my tables?

I want to find the performance (rows/second) for an UPDATE query on one of my tables so I can adjust my WHERE clause to select an appropriate number of records. The table has around 10 million rows. ...
0
votes
1answer
87 views

pg_basebackup: could not set compression level -1

When trying to run pg_basebackup I received the following error message: pg_basebackup: could not set compression level -1 (null) using the -z option. I received a similar error message when trying ...
0
votes
0answers
1k views

Uninstalling Oracle Database Products: Which & How to?

Long time reader, first time poster. For our client's project we are using Oracle 11g. It's a simple C# web application so we are using Oracle's most basic components. Now my project team has been ...
8
votes
2answers
2k views

Creating index on computed field: string or binary data would be truncated

I have a table Foo with the following fields: ID bigint not null identity(1,1), SerializedValue nvarchar(max), LongValue as TRY_CAST(SerializedValue as bigint) Now I want to create an index on ...
0
votes
2answers
132 views

Does CAST(DateTime AS DATE) cause the entire table to be CAST before comparison? [duplicate]

This is a very common need in the WHERE clause of our SQL statements: CAST(Something.CreationDate AS DATE) BETWEEN CAST(@firstDate AS DATE) AND CAST(@lastDate AS DATE) All of the fields are of ...
1
vote
3answers
277 views

MySQL incremental backups per database (not global)

While searching for free/open-source MySQL incremental backups solutions I have found a number of ways to do incremental backups and all of them seem to either rely on "logical" way of backups/restore ...
7
votes
1answer
915 views

Query plan cache bloated by ad-hoc queries, even with “Optimize for Ad-hoc Workloads”

I've been noticing what I thought to be unusual issues with our query plan cache, where the plans in the cache were never more than a day old. Through running the following query (courtesy of ...
1
vote
1answer
138 views

Slow queries InnoDB occasionaly

I have the next table: CREATE TABLE `sessions` ( `session_id` char(32) COLLATE utf8_unicode_ci NOT NULL, `session_expires` int(11) NOT NULL DEFAULT '0', `session_data` varchar(10000) COLLATE ...
1
vote
1answer
31 views

Index table for horizontal shard

Lets assume we have a vary amount of clients, which could manage some stuff on our site. Each client has his own table, which is used to store data. For instance: client_1, client_2, ..., client_N. ...
1
vote
1answer
63 views

How can I make multiple joins on the same table?

I have a table (signal) which contains references to two other tables (ee and eeav). I want to perform an SQL Query which combines the data from ee and eeav tables. The situation is as follows: The ...
1
vote
1answer
362 views

LOAD DATA stuck at Null State MySQL

I'm stuck trying to move one table to another, due to columns now no longer having proper references/meaning to their column titles. In doing this, I've created a new table with the same number of ...
0
votes
0answers
23 views

loading k:v pairs from DB into JS Object

I'm creating a single player web RPG. I'm debating the following method of storing/retrieving quest items per player id: In userstats table, have a quest_items column of type mediumtext, where I ...
1
vote
1answer
1k views

Using ODBC Connection to Access Firebird Database

I have an ODBC connection to a Firebird database that tests successfully. Is there a way to use this ODBC connection within SQL Server 2008 R2 to access the tables? I haven't used Linked Servers ...
1
vote
2answers
543 views

Dynamic UPDATE fails due to unwanted parenthesis around string in plpgsql

Using PostgreSQL 9.3.4 on Mac OSX 10.9.2 with Postgres.app. I want to apply a function to all columns in a table, specifically I want to trim white space. So far I've got this in a file test.sql: ...
1
vote
2answers
6k views

Problem sending an attachment using dbo.sp_send_dbmail

This question has been asked on the main stackexchange site I was referred here by a user there. ...
0
votes
1answer
695 views

Need help to understand how information_schema.TABLES get updated

I created large innodb table mysql> select count(*) from big_data; +----------+ | count(*) | +----------+ | 23822336 | +----------+ checked the stats in informaion_schema.TABLES mysql> ...
4
votes
1answer
170 views

Splitting SQL Server tempdb to use a second drive when first drive is full

My SQL Server instance has a small 32 GB SSD which is mostly unusedw while the remaining drives are SAN storage. I considered moving my tempdb to the SSD but my fear is the odd occasion when the ...
1
vote
0answers
561 views

PostgreSQL refuses to listen on IP [closed]

This was a case of PEBKAC. By default, the listen_addresses line in postgres.conf is commented out. I failed to notice this and remove the comment. I'm trying to get a PostgreSQL 9.3 server up and ...
1
vote
1answer
115 views

Rules for Decomposition to 2 NF

I am struggling with the concept of 2NF form. Lets say I have a set of functional dependencies for R1(A,B,C,D,E,H,M,K) Where : B -> M,C AB -> D DH -> E H -> K A -> H Whenever I ...
1
vote
1answer
174 views

Huge cross product view query speed

I have a huge view what consists of about 15+ million rows and about 150+ columns. That view is made of a lot of LEFT OUTER JOIN between a master table and various related tables. That master table ...
0
votes
1answer
69 views

Why use foreign keys if cascade action is not need?

I'm testing some queries with MySQL and tried to create two tables were there should be a reference between IDs. Something like: CREATE TABLE user ( id int(11) UNSIGNED AUTO_INCREMENT, name ...
1
vote
1answer
97 views

Building a query to copy user security settings to another user

I am trying to write a query to look at a current users security settings, and then copy those settings over to another user. My data is as follows: Logon_user Logon_level Form ABOND 1 ...
0
votes
1answer
205 views

Error exp oracle XE on centos

i have a problem when i try to export ... Connected to: Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production Export done in WE8MSWIN1252 character set and AL16UTF16 NCHAR ...
1
vote
0answers
46 views

GRANT CONTROL SERVER when user may be an entity owner

I have a login called user1. He only has the role of public. I want to grant CONTROL SERVER to him. So from sa I run this query USE [master] GRANT CONTROL SERVER TO [user1] Which gives me this ...
3
votes
1answer
567 views

Print message comes out in batches

I have simple query WHILE ( @counter < 50 ) BEGIN BEGIN TRANSACTION PRINT 'Counter = ' + CONVERT(VARCHAR(4), @counter); WITH CTE AS ( ...
0
votes
0answers
373 views

group by and order by making query very slow in mysql?

Query works fast: select SQL_NO_CACHE users.id, users.name from useres left join user_statistics on users.id = user_statistics.user_id where users.is_deleted = 0 group by users.id ...
-2
votes
1answer
57 views

Retrieve SQL statements - No backup, No query tracing [duplicate]

I know that my question probably don't belong here but I would be really so thankful if someone has the skill for solving this out. I have recently made several update statements that I shouldn't ...
0
votes
2answers
533 views

SSAS tabular browse excel relationships not working

I'm currently building an education data warehouse. I have three factless fact tables for distinct set of grades due to the fact i have no measures (i'm not aggregating anything), the grades are ...
0
votes
0answers
955 views

how to append or update JSON datatype value in postgreSQL

hey guys i'm using PHP's codeigniter to create my application and postgreSQL as database and i have to update some value in database. So, let's say we have table structure like this:- CREATE TABLE ...
0
votes
0answers
39 views

Intermittent Connection Speeds SQL Server 2008

We are having issues with a PHP-based application connecting to an SQL Server database on a separate server. It uses a single PHP page to establish the connection using mssql_connect, and this page ...
3
votes
1answer
538 views

How are Mongodb indexes stored on disk?

So let me first start the question with my understanding of how MongoDb stores data on disk: So when you create a database in mongodb, it allocates a large file named <databasename>.0 and within ...
2
votes
0answers
707 views

Oracle parallel query: finding out which Producer a Consumer is waiting for

One of our materialized view refresh's (part of a daily ETL routine) was hanging today; it usually completes within 5 minutes, but this time, I had to kill it after 23 hours. V$SESSION contained this ...
0
votes
2answers
194 views

Disk I/O Activity

Resource Monitor on our SQL Server DB server shows very high fluctuating disk activity that I cannot understand. I then check Activity Monitor and the Database I/O looks ok. Any ideas why I am seeing ...
0
votes
0answers
256 views

Error while taking backup in Postgresql

While taking a backup from my PostgrSQL database, it is showing this: pg_dump: Dumping the contents of table "gtab17" failed: PQgetResult() failed. pg_dump: Error message from server: ERROR: invalid ...
3
votes
1answer
62 views

“zip” a mySQL (phpMyAdmin) database [duplicate]

I've created a large database on my local WAMP webserver. I would like to send that database with all tables and table data to another computer. Is this possible? mySQL ver: 5.5.15 PHP ver: ...
0
votes
0answers
637 views

Impdp over DB_LINK failing with ORA-31631

I am getting below error message while trying to execute impdp between our SIT and UAT environments: ORA-31631: privileges are required ORA-39149: cannot link privileged user to non-privileged user ...
0
votes
1answer
280 views

Query with INNER JOIN takes long time than expected?

I have the following query, which takes longer than expected. Anybody help me find a faster alternative? SET SESSION MAX_JOIN_SIZE=18446744073709551615; SELECT claims.claim_id, ...
0
votes
0answers
1k views

Installing SQL Server 2012 failed setup administrator

Can anyone tell me why this keeps failing? I am logged in as "Administrator" on Windows Server 2008 r2 I added Administrator to the "Backup ... " Group And I checked to make sure everything is as it ...
1
vote
1answer
60 views

Insert (write) performance

We are trying to speed up the queries in our application and in the process identified all queries which took more than 100ms. We noticed that there were few insert statements which took more than ...
1
vote
0answers
45 views

Getting upcoming world wide releases from a database

From my database I want to get upcoming world wide release dates for an itemId along with the platformIds. If I have a table that looks like this and the current date is 2014-05-14 ...
1
vote
0answers
528 views

How to generate data for News Feed efficiently like facebook , googleplus , twitter e.t.c?

I have created table as post ( post_id int(15) auto_increment primary key , user_id int(11) , post_text varchar(2000) , post_type int(1), ...
5
votes
1answer
76 views

Giving server-role to login breaks stored procedures

I have a login called user1. user1 can execute storedprocedure [Test].[SP1] EXEC [Test].[TestSortation] EXEC [TestSortation] Both of the above commands work. Now if I give the user1 the server ...
1
vote
1answer
812 views

Can you see other users' session variables in MySQL?

In MySQL, Using SHOW GLOBAL VARIABLES gives the ability to see global variables. SHOW SESSION VARIABLES are the variable settings for that session. Is there a way to see the SESSION variables of ...
3
votes
4answers
233 views

How to find duration in a dataset

I have a dataset of the following structure: Target, PollTime, Value ------------------------ 1. A, 2013-12-13 13:31:44.000, 15.00 2. A, 2013-12-13 13:32:44.000, 16.00 3. A, 2013-12-13 13:33:44.000, ...
2
votes
0answers
559 views

Converting a SQL_ASCII database to UTF-8

I have a postgresql (version 8.1) database that has the encoding set to SQL_ASCII, combined with several apps that some are running using UTF8 and some with LATIN1. With this scope I have a database ...
1
vote
1answer
114 views

What is the advantages of using auto_increment in database as primary key over set of attributes?

I have table as CREATE TABLE circle ( circle_id int(11) auto_increment primary key not null, user_id int (11) not null, title varchar(255) collate utf8_general_ci not null ); CREATE ...

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