An acronym for "Structured Query Language" (it's not the name of a specific DBMS product), SQL can be used in relational database management systems (RDBMS) to query, update, delete, and insert data as well as modify the structure of the database. It can also be used to manage schemas and data ...

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92 views

find total money of parent node of tree according to a particular pattern

actually i am working on a project in which members are added in a tree pattern, and get the payment accordingly. My tbltestingtree structure is ass follow: Id ParentId IsLeft ...
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3k views

How to speed up query on table with millions of rows

The Issue: I'm working on a big table that consists about 37mln rows. Data include measurements of many devices made in certain time e.g. '2013-09-24 10:45:50'. Each day all of those devices are ...
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26 views

Optionally free-form reference

I've seen a few instances of entities which have a field which can be either a reference to another entity or free text. You typically represent this in the UI by having a dropdown widget which can ...
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95 views

Getting distinct list of records based on the MAX of a column

I have a status table (tblTestActionStatus) which has three columns ID_TestAction: references some test action ID_Status: a look up table reference for the variety of possible statuses for the ...
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86 views

How to index for a group by with columns from different tables?

Is it possible to create an index from columns of 2 different tables? If not, how do we optimize a query that does a group by on columns of 2 different tables? For example: the following ...
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92 views

MySQL Replication fails - commands received in wrong order?

The other day, I had this issue with one of our MySQL 5.1.60 master and 5.1.61 slave setups: Last_Error: Error 'Can't create table 'foobar.#sql-4b87_2' (errno: 150)' on query. Default database: ...
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151 views

How to store object with property of generic type in DB

In my business domain there exists an entity parameter. Beside other properties which are identical for each parameter, they have values. These values can be of different data types. There might be ...
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173 views

SET IDENTITY_INSERT equivalent in Access

In sql server i can explicitly insert value to a identity column of a table by using SET IDENTITY_INSERT ON . For an Access database i am using Autonumber column datatype. For this column i am not ...
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47 views

A pre-existing hierarchial table as relational

Currently the database contains something like so (these are the main fields but there's a large amount more): +----------+----------------+----------+ | Agency | parent | main_term ...
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135 views

Producing an outstanding fees report in MySQL

This question is about a MySQL stored procedure to select the records from two tables by joining them and also do some arithmetic operations in that. I have 3 tables for fees one is to store fee ...
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51 views

Rows do not match Subscriber and Publisher

I have an transactional replication setup with updateable subscription that is utilized by an Application. When I insert a project into the application, the msrepl_tran_version is different on the ...
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345 views

Creating view recursive query in Oracle DB results in ORA-00600 (ORA-600)

Hello Ladies and Gents, I've been trying to deploy a recursive query as a view in Oracle XE and Standard Edition, neither to much success. The query is located in this question here: ...
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280 views

Search for string in xml column

I am using sql server 2008 r2 express. I have a table with column name 'xmlmycolumn' which is of datatype xml. I want to search for string in that whole xml. So to do this i am casting column as ...
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45 views

What is a good way to Merge 2 range sets into a single view

The real purpose of this has to do with effectivity dates and contains additional keys and fields, but I simplified it for the sake of, well, simplicity. Sample: test_Widget Table theFirst ...
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216 views

Search for multiple keywords related to separate columns on a single table

Imagine I have a table with the schema shown. Each of the columns represent a searchable collection that I would like to be picked up in the search. I am looking for a method that would derive the ...
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242 views

Database Timeout Error from VB Application

Recently we are receiving so many database timeout error from different servers we are using vb application -- which will use ODBC connection to connect database - here no problem when we run the ...
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99 views

Why is this query creating 300+ temporary tables in Mysql?

SHOW global STATUS LIKE '%tmp%'; set @UID = 132; set @param2 = 'cde'; set @param3 = 20130331; set @param4 = 'C'; select p.id, p.column44, p.column42, ue.column35, u.id, p.column43, p.column45, ...
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2k views

Achieve PostgreSQL hstore functionality in MySQL

Please suggest any MySQL 5.5+ Engine that can support collection of key-value pairs be stored in any column of a table. I don't know if this feature is available out of the box in MySQL like ...
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429 views

Collect CPU, reads and writes when replaying SQL Profiler Trace

I'm trying to replay a trace on a test environment with SQL Profiler in order to benchmark a database prior to making some performance tweaks. I intend to replay the same trace at various stages to ...
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55 views

Will Startup Procs Run Again After Database Recovery?

We have a number of stored procedures that run on startup via the sp_procoption startup: exec sp_procoption 'ProcName', 'startup, 'true' A customer's server started up with a very large database in ...
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447 views

Efficiently retrieve big amount of data based on date range

Table EVENTS TimeStamp |O.Name |Location |Source | 2008-11-12 |Pretorian|Európe |England | 2009-12-24 |Lex Rosa |Európe |Italy | 2010-01-01 |Nasdaq |USA |Whasington | ...
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165 views

Calculate lower and upper quartile of SQLiteDB via query

I want to calculate the upper and the lower quartile of the value what I call "diffs" in these fiddle with my DB and the query How can I do this with SQLite? There's an extension on the ...
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1k views

sql agent job hangs without any errors or warnings

Problem: we have a SQL Agent job which runs everyday in the morning at 4:00 am. This job hangs sometimes without providing any errors or warnings. It just hangs. BUT when i stop the job and run again ...
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60 views

Oracle update query sequence of actions on DB side

I searched online but could not find particularly consolidated source of what happens when you execute an update query. I know that there are a few actions happening like create redo data and logs ...
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231 views

big mysql database optimization

My Joomla mysql database has about 3.4 million rows in content table. It is just static article. Very slow and often use out of resources. To speed up it, I segmented it into 6 sub-tables and added ...
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82 views

Mysql: Large Query with subqueries optimization

Any query optimization gurus in the house?? Anyway, I am trying to attack this on two fronts, one being to code a way around it but secondly, I'm thinking some real optimization might help in the ...
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120 views

Pass in dynamic value to Oracle job scheduler

How does one pass a dynamic value into the oracle job scheduler when the underlying command is a stored procedure? example procedure: create procedure foo (bar varchar2) ... Job creation in ...
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165 views

Multi-Table Join to Single Destination

I am having a serious performance issue with join together four tables and placing the results (in a certain permutation) into one destination table. I am using MSSQL 2008 and good ole T-SQL. To ...
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464 views

How can one reliably update a LOB column with data from another LOB column in Oracle?

I have tried: UPDATE "SCHEMA".TABLE SET LOB_COLUMN = (SELECT LOB_COLUMN FROM "SCHEMA".TABLE) I have tried: CREATE OR REPLACE PROCEDURE COPY_LOB_DATA IS OLD_BLOB BLOB; NEW_BLOB BLOB; ...
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129 views

Use of hash functions in group by?

I'd use a listagg() to generate a list of components a certain customer has and compare it to another list generated the same way somewhere else to detect inconsistencies. The problem is that ...
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137 views

hStmt/cursor error caused by faulty data?

Could a busy hStmt and invalid cursor errors be caused by faulty data? ODBC and the software that connects to the database is correct and working - i have ran a test with a clean database (that has ...
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0answers
166 views

Get all comment.message, status.message, users.* and profiles.* where users.user_id exists in friend.friend_id or friend.user_id

I need some help building this query because it's a bit complicated at least for me. I need to get all comment.message, status.message, users.* and profiles.* where users.user_id exists in ...
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37 views

How does MySQL 5.1 use indexes?

I've read the docs for MySQL v5.1.x on how about the indexes are used, but I'm not sure I understood it properly. Suppose having the following MySQL table: CREATE TABLE IF NOT EXISTS ...
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907 views

SQL query optimization in Prestashop e-Commerce solution

I'm working on a layered navigation module within Prestashop e-Commerce solution. I'm trying to optimize a SQL query which creates a temp table during execution. I think this is creating a ...
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133 views

Database model problem from MS Access to SQL Server 2005

Good Day, I am a C# programmer but I have a problem with a database model on SQL Server 2005. I have a client who told me to rebuild his database from Access to SQL Server 2005 and actually I did but ...
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206 views

Cannot Check if the Access Database Engine is Installed and Configured

All, I want to check if the Access Database Engine is installed and linked to SQL Server. On my development machine (x64-bit) the following queries both show the Access Engine to be avalible as a ...
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0answers
68 views

How to write up the specs for the server that we will need

I am a dev. and have written basic app. which will be used by customers this app. Basically, I present them screen to select their excel file which has some billing info. we are analyzing this billing ...
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33 views

Monoblock, Multiblock queries?

What exactly mean the terms monoblock / multiblock queries in data warehouses when talking about materialized views? Does a monoblock query just use one data source (a normal table) while a multiblock ...
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0answers
21 views

Receiving duplicate results in one condition of JOINED query

I always end up here when Googling for solutions, so I thought I'd cut out the middleman since I'm unable to fix this via searching/forums. It's my first time posting, so please forgive any faux pas ...
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0answers
22 views

SSRS URL Changes while navigating

I am trying to track down the root cause of this issue I keep seeing. We have SSRS running with a custom URL like https://reporting.companyname.com/reports. When I connect to that address I can ...
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0answers
26 views

Query output conditional upon values in dataset

If the number column contains values 5 AND 6, AND the value X exists in the chr column, I would like to exclude rows with 10 in the test column. But, if the number column contains values 4 AND 5, AND ...
0
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0answers
50 views

Accidentally deleted records in MS SQL Server 2014

I have a very big problem with SQL Server data lost. Recently, i have performed SQL replication. and i found out that all exising records/rows in the subscriber was totally erased and replaced by the ...
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0answers
34 views

Querying system tables from Linked Server

I am trying to query the syspublications table on Linked Server A from Server B. Both servers are running SQL Server 2012. Using this simple query on Server B: SELECT a.dest_table FROM ...
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0answers
27 views

mysql advanced query

I'm sorry for my English. I have a problem with db mysql. I have a table like this id|rat|time 1 |2 |12:00 2 |0 |12:55 3 |0 |13:05 4 |6 |13:45 5 |0 |14:00 6 |8 |15:00 7 |0 |16:30 8 |9 |17:00 ...
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0answers
40 views

SQL Mirroring synchronize logins and agent jobs

We have just started using SQL Server mirroring for several clients on SQL Server 2008 R2 Standard. We've got the SQL Server mirroring working fine however now we run into the issue of replicating ...
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0answers
15 views

Merge colums from two different databases using phpMyAdmin

Is there a way to: Replace all the data from database1 > table1 > column2 With Data from Database2 > table1 > column2 ONLY under the condition that the ID value in database1 > table1 > column1 ...
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0answers
40 views

Column encryption/decryption using encryptbykey

Working on a project where I need to encrypt a few sensitive columns in a table but make the data available through a procedure that a user can execute through either a report or excel. In looking ...
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0answers
28 views

Please anybody help me with oracle db importing?

I try to import .DMP file with impd comand. root@HP:~# impdp SYSTEM/xxxxxxxxx log=4.log file=as.DMP and i get this ;;; Import: Release 11.2.0.2.0 - Production on Thu Oct 2 12:21:14 2014 ...
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0answers
48 views

Intermittent errors when calling stored procedures with linked server references from SQL Agent jobs

Environment: Windows Server 2008 Standard without Hyper-V Service Pack 2 - 64 bit SQL Server Enterprise 2008 R2 SP2 - 10.50.4000.0 - 64 bit Problem: I am receiving intermittent failures from ...
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0answers
11 views

Assigning Parent Node Value using IDs

I am using iReport to build a report and I am trying to find the parent node "group_name" value based on a parent_id given, and return the value the parent, as the child's value. For example: Table: ...