3
votes
2answers
10k views

How to hide rows in SSRS report?

I'm trying to figure out, how I can hide those rows in my report where Total Allocation and Total Cost IN BOTH COLUMNS TOGETHER are 0 in SSRS 2008. For example: Total Allocation Total Actual ...
18
votes
3answers
2k views

difference in execution plans on UAT and PROD server

I want to understand why there would be such a huge difference in execution of the same query on UAT (runs in 3 sec) vs PROD (run in 23 secs). Both UAT and PROD are having exactly data and indexes. ...
1
vote
1answer
1k views

Datawarehouse - Dimension, Fact, or Degenerative dimension

I am building a warehouse for a billing system that bills a number of services/utilities on the same invoice, as such I am having real trouble conforming to a recognised design method for the ...
0
votes
1answer
171 views

Shrink Database Did Not Reclaim Much Space

I have a SQL Server (2005 Developer Edition) database that has grown too large for it's drive. Yesterday evening I dropped a large table that was no longer needed and last night I set up a ...
2
votes
1answer
149 views

Optimizing query on a partitioned table

Tried to find an answer for this, but couldn't. So bear with me and apologies if this has been answered elsewhere. It may be just me not being able to find it. Here's the setup: SQL 2008 R2 EE. Table ...
0
votes
0answers
454 views

Random MySQL Cannot Connect to Master Errors

We installed MySQL 5.6.14 Community Edition on a Windows Server 2012 VM about a month ago. We have a web VM on the same box that utilizes the database using the latest MySQL Connectors for .Net and ...
1
vote
1answer
319 views

How to setup a MongoDB replica set for the connector

I want to keep MongoDB and Solr in sync. The mongodb-connector (python) is the tool I want to use to do that. Now a replica set in mongodb is required (see ReadMe), but I don't want (and can) setup a ...
1
vote
3answers
901 views

Low Cardinality of Index performing better than High Cardinality?

For testing purposes I have 2 Tables TableA and TableB in an mysql-InnoDB, both with the same columns id bigint not null auto_increment, depot smallint not null, custno bigint not null, range_from ...
4
votes
1answer
4k views

Comparing two queries in SQL Server 2012

I am comparing two queries in SQL Server 2012. The goal is to use all of the pertinent information available from the query optimizer when choosing the best query. Both queries produce the same ...
0
votes
1answer
40 views

Joining 2 tables- in Select statement show how many fields matched directly (A1 = B1), vs matched on isnull(A1,B1) = B1

I have 2 tables which I need to join, but sometimes there are 1) direct joins e.g. t1.FieldA = t2.FieldA OR 2) when t2.FieldA is null then it must join as well then t2.FieldA is null t1.FieldA = ...
0
votes
1answer
2k views

SQL Query with multiple conditions on date

I want to write a query with condition on dates for below table and sometimes it requires great thinking. StartDtm StopDtm 2013-11-03 00:00:00.000 NULL ...
0
votes
1answer
59 views

SSMS gives error if column name is “MERGE” where as other keywords works

IN SSMS create table if we include sql keywords in column name then it will be wrapped around square brackets "[]" automatically and the table gets created without any error generally. But if we ...
-1
votes
0answers
6k views

Errors trying to install SQL Server 2012 on Windows 7 [closed]

I am getting the above error message when i try to run the setup file. Microsoft SQL Server 2012 Service Pack 1 Setup The operating system on this computer does not meet the minimum ...
0
votes
1answer
160 views

Which index types do not support online index rebuilds?

In SQL Server 2012 Enterprise Ed., which index types do not support online index rebuilds? and why? and which activity-operations can prevent online index rebuilds?
0
votes
1answer
24 views

Are files and file groups included when doing a full backup?

I have a database with 4 files and 2 file groups. According to the size of the files, it's 1TB. However, the backup (non-compressed) is only 350GB. Is this typical? Or, do I need to specifically ...
0
votes
1answer
526 views

What is blocking 'SELECT… WITH(NOLOCK)'?

While following BrentOzar's "How Much is Offline During an Index Rebuild?" I was curious to run: SELECT Quantity FROM [Production].[TransactionHistory] WITH(NOLOCK) while executing a rebuild ...
0
votes
1answer
593 views

FATAL: catalog is missing 1 attribute(s) for relid 2662

I have a server with PostgreSQL9.1-903 (Windows 7 Professional). After a power cut my database is inaccessible (I presume that the database is corrupted). The postgreSQL service starts but the ...
2
votes
1answer
138 views

Can MySQL use an index to calculate SUM?

The following query is run in a MySQL database (all InnoDB tables, Percona 5.5), and is slow for some parameter values (i.e. for some large customers). It returns the total size of all files uploaded ...
1
vote
2answers
344 views

Postgres sequence usage

I have an Postgres database with two users: dev and junit. Junit and dev objects are dropped and created regularly. They both have the same objects unshared for tables, however, sequences are shared, ...
1
vote
1answer
97 views

Oracle Logical IO / Consistent Reads inconsistent?

I use Logical IO to tune my Oracle queries and generally ignore wall-clock times as we have a large Oracle DB in a cluster with a total of about 80Gb SGA and an EMC cluster with tiered storage (Gigs ...
0
votes
1answer
124 views

Join and Count based on Specific User ID in SQL

I have the following tables, I inserted some dummy data in it for demonstration purposes. I would like to join these two tables in a way that based on the user ID, I can get the count of similar ...
0
votes
3answers
1k views

SQL Server, how to execute a job against all databases on server?

I'm trying to find the best way to execute a query against all databases on the server using SQLServerAgent or maintenance plan. I have a stored procedure that i'd like to run on these databases, but ...
0
votes
1answer
48 views

Allocating Filegroups and Storage

I have upto 10 databases running on a single SQL Server instance on a single server. I have read about best practice for storage and concluded the following... 1) Transaction Log on own RAID array ...
0
votes
1answer
32 views

Conditional when creating a domain

How can I define or change a domain based on another attribute value? F.e. domain for salary is a numeric value > 500. But if a date the person was hired > January 1st, 2013, then the salary must be ...
5
votes
2answers
192 views

In the SQL Server RESTORE statement, in what time zone is the STOPAT argument?

SQL Server can perform point-in-time restores using the STOPAT argument. In what time zone is that date and time value? Is it UTC? Is it local for the server the backup was taken? Is it local for ...
2
votes
0answers
163 views

Tool to visualize data differences between two DB tables [closed]

I work as a tester. I found some of the defects I investigate can be traced down to differences in configuration between local and customer's environments. As the tested system has major part of ...
1
vote
1answer
148 views

SQL Server log file continues to grow? [duplicate]

I'm having an issue with a SQL Server log file which will not maintain a steady amount of space held on a HDD which it has been issued. The drive is ~50GB and the log file is growing to occupy this ...
0
votes
2answers
2k views

How can I find who has allocated a user lock via dbms_lock?

We have a print queue process that acquires a user lock via dbms_lock.allocate_unique. It performs the work and then releases the lock. The process works very well. Today, we have a process that ...
1
vote
3answers
466 views

Proper use of database functions for business logic

I have a database in postgres with 147 tables; these tables contain data generated by functions that have most of the logic of the system, for example how to build an accounting entry. These ...
1
vote
3answers
939 views

Converting live MyISAM table to InnoDB

I have a table that tracks web traffic. The table is constantly written and read from. Since table is pretty big in size I have to make sure the application will not "freeze" in the process of ...
0
votes
1answer
267 views

Backing up MySQL w/MyISAM on Amazon RDS

So, for various good reasons, we're maintaining a mySQL database using a MyISAM engine on Amazon RDS. I've just taken over this application, and I'm concerned we're not getting good backups, since ...
6
votes
3answers
5k views

save/export PGAdmin server list configuration settings

I have a ton of configured connections listed in the Server Groups, is there a way I can save this? not just save the passwords but the Server Group Settings
0
votes
2answers
4k views

How to sync two databases (alternative to mysql replication)?

Hello i have 2 mysql databases where most of the structure is constant except few tables (additions) in 2 dbs. I need to synchronize these 2 databases mainly common tables from one db to another. This ...
0
votes
2answers
96 views

Can I improve this query?

SELECT * FROM SameLogTable WHERE ID_Table IN (SELECT ID_Table-1 FROM SameLogTable WHERE <SameCondition>) OR ID_Table IN (SELECT ID_Table ...
2
votes
1answer
254 views

NEWSEQUENTIALID() resets sequence on server restart

MSDN learns me that NEWSEQUENTIALID(): Creates a GUID that is greater than any GUID previously generated by this function on a specified computer since Windows was started. After restarting ...
1
vote
1answer
1k views

Automatically create ER diagram from database schema

I have a database with 193 tables and I need to create an ER diagram from them. There are no formal relationships between the tables with respect to FKs. The relationships are mapped with 1-* tables. ...
1
vote
2answers
59 views

What does enabling containment on server incur?

Having read in a book of Patrick LeBlank "Microsoft® SQL Server® 2012 Step by Step": "Benefits and limitations of contained databases As with most features, there are benefits and ...
2
votes
1answer
2k views

VS2012 setup spoils SQL Server 2012 Data Tools for everybody or just me?

On Windows 7 Prof I have installed SQL Server 2012 R2 with, as I am pretty well remember, client tools. Then, I tried to install Visual Studio 2013 Ultimate but failed. Then I've installed VS2012 ...
1
vote
2answers
105 views

db2 executing command crash shell

I have a simple ksh script that executes db2 queries, such as #!/bin/ksh #some initialization #step1,2,3 set -e db2 -x "select * from table a " #step4 The main issue seems to be caused by the db2 ...
0
votes
1answer
37 views

Oracle sql plan for a select with procedure in terms section

Is there any difference in optimizing a plan to execute any sql request in case of using a procedure from a package which checks to display row or not and in case of constructing a plain sql query ...
0
votes
0answers
80 views

Select with IN list and date comparison not picking up index

explain select sum(principal_received) principal_received, sum(interest_received) interest_received, sum(advance_received) advance_received, ...
0
votes
1answer
37 views

In MySQL, when using InnoDB, what happens to the way data is laid out on disk when the primary key is dropped?

In MySQL, when using InnoDB, what happens to the way data is laid out on disk when the primary key is dropped? Also, what happens when a new primary key is added?
0
votes
1answer
188 views

Implementing foreign keys on generalized data model

Suppose the ASCII tree below is a UML generalized concept model. To represent these entities/classes in UML, lets assume [mammal] a super class, and the level 1 classes, [wild] and [domestic] are sub ...
1
vote
1answer
258 views

INSERT INTO selected columns creates new column from JOIN [closed]

I have an INSERT INTO ... SELECT.. query that uses a JOIN on two tables. The results of the query should take a subset of the information and insert it into an existing table. That part works, but the ...
1
vote
2answers
155 views

query to check all SCD tables that have data for specific date

It's easy to find all SCD tables through select * from syscat.TABLES t join syscat.COLUMNS s on t.tabname = s.tabname where s.COLNAME = 'EFFECTIVE_DTE' and t.type='T' ...
0
votes
1answer
202 views

How is parallelism threshold (seconds) used if query CPU cost is actually unitless

How does the optimizer decide whether or not to use parallelism when the parallelism threshold is specified in seconds (on specific hardware, see below) but the estimated CPU costs are supposedly ...
0
votes
1answer
182 views

Oracle 11g INDEX_SS Hint

Given a table with columns A, B, and C of type CHAR(15) and an unique index If I have a query with a WHERE clause specifying A and C, oracle's optimizer chooses to do an index range scan. But if I ...
1
vote
1answer
3k views

Different execution plan for the same query if I change a value in the predicate

I am getting two different execution plans for the same query only by changing the value in the predicate, the first one uses nested loops and the other one hash join which takes a lot longer. ...
4
votes
1answer
217 views

SQL query filled Temdb complete Harddisk [closed]

I have a query which was earlier fine but now it is running me out of hard disk space with message that tempdb is full. My Harddisk has 90 gb of space as soon as i run query temdb runs out of space in ...
1
vote
0answers
85 views

DB2 crashes when XML columns used in Cursors inside a SP

This is the Stored Procedure code written in DB2 V9.7 LUW FP5 **CREATE OR REPLACE PROCEDURE USP_TEST ( IN LOC_LIST XML) P1: BEGIN ATOMIC DECLARE IV_SOV_LOC_ID BIGINT; DECLARE ...

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