DO NOT USE this for questions targeting Microsoft SQL Server, use the tag sql-server instead. "SQL" is an acronym for "Structured Query Language", it is used in relational database management systems (RDBMS) to query, update, delete, and insert data as well as modify the structure of the database. ...

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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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100 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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253 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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238 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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171 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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55 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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0answers
476 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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370 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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292 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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58 views

MySQL not using resources?

Hi I have a decent setup: 16Gb RAM and a 4 cored CPU. I'm on a 64-bit Windows OS with MySQL Ver 14.14 Distrib 5.5.24 Win64 (x86). I am also using InnoDB. The query I am using to test the setup is a ...
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285 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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115 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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541 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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58 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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549 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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194 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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63 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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337 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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158 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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170 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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554 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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135 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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143 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
997 views

Sqlsrv sqlsrv_num_rows FALSE, adding cursor type times out

$sql = "SELECT * FROM lastdeath"; $result = sqlsrv_query( $con, $sql); if( $result === false ) { die( print_r( sqlsrv_errors(), true)); } $row_count = sqlsrv_num_rows($result); echo $row_count; ...
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182 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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1k 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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138 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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217 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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72 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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41 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
5 views

Standby Database mirroring/user read only/back up

I have a SQL Server 2008 R2 database in standby read only mode which retrieves transaction logs every 15 minutes. I'd like make the data available for read only to other users but am unable to do that ...
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0answers
12 views

Query to Find Cluster Nodes for an Instance

I need a way, using T-SQL, to find the nodes available to a SQL instance. I have 3 nodes in a cluster running several instances of SQL Server, each instance is 2012 Standard and so can only be ...
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0answers
7 views

SQL Query to compare (HL7) value at certain position in string based on delimiters (not position)

This is complicated by the fact that I don't know what DBMS the backend uses. I know it's Cache, but I don't seem to be able to do anything but the most basic commands. I cannot seem to SET or ...
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0answers
23 views

Designing multi-table notes

I have several tables (Providers, Items, Users) representing items that my users can comment on. In the OO mindset, if the above tables were classes, they would each be a subclass of Commentable, ...
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0answers
37 views

Database deploy automation

In my company the developers use migrations for the schema changes in the database server and for install new databases too. More precisely they use Active Record (Ruby version). They have a project ...
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0answers
56 views

sp_WhoIsActive is not displaying results

I'm trying to use the sp_WhoIsActive stored procedure that I've downloaded from here: http://sqlblog.com/files/folders/release/tags/who+is+active/default.aspx I'm running the procedure without ...
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0answers
46 views

Why are transactions long running?

My stored procedure has a transaction blog. I pick up a record from a database and process it in that transaction block. I noticed that my transaction log has grown in gigabytes. But my transaction ...
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0answers
52 views

How can I replace the cursor in the below query?

I have this below query which calls a stored procedure that takes only 1 item's attributes at a time. But because of performance problems we are required to remove the cursor. How can I replace the ...
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0answers
8 views

Macro to search list JDE ERP

I have a list of Part numbers in a txt file. I need to get the matching Inventory number for each from our JDE database. Is it possible to build a macro in I-Series to search a JDE database for ...
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0answers
13 views

Query JDE ERP Excel

I have a spreadsheet with a list of values, each matching to a particular part. I need to get a matching inventory number for each. My company uses JDE as an ERP. Is there anyway to use Excel (or ...
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0answers
26 views

How do I create an after Trigger in sql for a price reduction?

So im trying to do this for a personal project of mine just as a hobby kind of thing. What i need help with is that im not sure how to put a SQL After trigger for something i want to try. What i have ...
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0answers
36 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 ...
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0answers
24 views

How do I modify an access query to select a row based on one column when other column information is not distinct?

I have three main tables in Access 2007 that I query to get the Class, Skills, and Students. Mutliple other tables are included in the query to pull other information. If a person learned the same ...
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0answers
27 views

Query that return comma separated list of tuple

For example I have these two table: Table user_score: user_id/ tag_id / score 1 100 0.5 1 200 0.2 1 300 0.3 Table place_tag_count: place_id / tag_id / ...
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0answers
22 views

Postgres count of delimited items in bytea encoded string

How would you get a count for each of $ delimited Individuals in each of the group_names? (Example: SomeGroup has 1, This Is Another Group has 8) thedb=# select group_name,encode(group_data,'escape') ...