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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142 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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169 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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503 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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131 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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139 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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838 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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175 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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969 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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137 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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214 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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35 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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13 views

Are there limits to SSRS 2014 RDL files going over to SSRS 2008 (or 2012)?

Is there any incompatibility with reports developed in SQL Server SSRS 2014, and then exported to .RDL files that will be imported into SQL Server 2008?
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20 views

Adding a second database to the same instance of a server

I already have a multi user software program running on Windows 7 work stations and the server is running Windows Server 2008r2. I am trying to setup another program using the same server. The code is ...
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16 views

How to determine is a value exists in a column within a partition

I have a set of data where I need to look at partitioned data and determine if a value exists within that partition. Example data: AccountNumber Code Status Credited ...
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24 views

What kind of data cannot be stored economically in a database / data-warehouse?

Someone mentioned this in a presentation but didn't provide any examples. This stuck with me and I am trying to figure out what kind of data couldn't be stored economically in datbases ever since. It ...
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20 views

merge two column into single columns and show them in separate rows

My Table looks like this Name Date1 Date2 Date3 A 25 23 20 B 20 15 10 I want it like this Name Date A 25 A 23 A 20 B 20 B 15 B 10 how i can ...
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16 views

How to setup a trigger for updated records

Prod database "Mother" Copy of database "Father" Here's my scenario I need help with: I have a database that has a table called User_Group table on our Production db "mother". The dev team wants me ...
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3 views

Delete fabricante_producto_solicitud only if is not related to modelo_marca_producto

I have this related tables: It's possible, in one query, check if fabricante_producto_solicitud has relation with modelo_marca_producto or do I need to rely on programmatic way? I need some ...
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17 views

DB2 LUW Timestamp differences in versions

Im new to DB2, my back ground is in MS SQL server 2000 thru 2012. I have a developer using Local DB DB2 LUW v9.7.500.4299 FIXPACK_NUM = 5 She is selecting some data from a table where the field ...
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17 views

Need help on transferring data from a PostgreSQL database to a future (to be decided) database!

(English isn't my native language) I'm doing an internship for school and my task is to theoretically describe the best way to transfer the data from their current database (PostgreSQL) that they have ...
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32 views

How can I track changes across 60 local databases with 1 million+ rows each?

The files are mdb and I have them locally on my computer. Just trying to track changes across the 60 databases. Realistically I want to compare two at a time and find the differences in the reports, ...
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25 views

How to cast as type of a table column?

I have multiple views with union like this: select column1, column2 from mytable union select cast(extcol as nvarchar2(15)), cast(extcol2 as nvarchar2(10)) from exttable But later I change the size ...
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33 views

Can I manage NULL = 'SomeDefault' in the database so applications and SQL don't have to remember this optimization?

I have a table with lots of default values, and want to store very common values as NULL to save space, without forcing my SQL statements or application logic to become overburdened with conditionals. ...
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24 views

How can I use Oracle's CONNECT BY PRIOR to only get specific revisions of hierarchical records?

I've got a table schema in Oracle 11 which is storing records that are linked together. The table schema is roughly like this CREATE TABLE "SOMEDATA" ( "ID" INTEGER NOT NULL, "ITEMNAME" ...
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9 views

Replication from Database A to Database B without taking new snapshot

I have Database A which is my publication database. Database B was a subscriber but something went wrong and we need to re-do the transactoinal replication. Database A is over 200GB and takes a ...
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13 views

Database design for varying prices from multiple vendors

I am designing a database where the products are sold in bulk with multiple pricing options, from 4 different vendors. What is the best table configuration to store this information? Id like to be ...
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37 views

MySQL Dynamic columns duplicate value workaround

As the title suggests i have the following code which transposes certain row values into field names, however the problem im having is that the values "closed" & "reopened" may appear in several ...
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11 views

Database systems with users and sub users accessing the data

I am making a database for school student maintenance. Below is the basic description. There are schools. One school has many staff (i.e: Principles,Teachers, Section Head, Office Staff etc) These ...
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25 views

Designing a correct table structure

We are trying to save the Family History of a particular foreign job applicant. Below are the details we have to save. Familiy Member: Father|Mother|1st Brother| 2nd Brother| 1st Sister| etc etc ...
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57 views

Partial unique constraint spanning multiple tables in postgres

To enforce partial uniqueness in postgres, it is a well known workaround to create a partial unique index instead of an explicit constraint, like so: CREATE TABLE possession ( possession_id serial ...
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19 views

How to query entire database?

I have an Access database with several tables. All tables have, among other things, a column called Tag and a column called Action. For most records, the Action value is blank, but sometimes it is not ...
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32 views

Export a varbinary column to file system using existing authentication

I want to export a varbinary column to a file system. I can use BCP command to export data from a varbinary column, which requires username and password being sent along with BCP command. I can use ...
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21 views

Using Code to Access Database Dump via pgAdmin

I looked over this question on how to import a data dump using pgadmin and found the following code: CREATE OR REPLACE FUNCTION db_to_csv(path TEXT) RETURNS void AS $$ tables RECORD; gmdeclare ...
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0answers
9 views

Modeling attributes relations in RDBMS/NOSQL?

I have a table to hold the relationship between attributes and documents: I need to support the following queries : give all documents where attrib X='value' give me all documents where attib ...
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0answers
9 views

Locally connecting to SQL Server 2012 using Windows Authentication

I have a SQL Server 2012 cluster which I've updated with SP2, and since the update I can't locally connect to the server using Windows Authentication. Yet, I can connect using same credentials from ...
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0answers
44 views

Is there any way to improve this code?

SELECT tblstud.studid, tblsched.ip FROM tblstud LEFT JOIN tblstudsched ON (tblstud.studid=tblstudsched.studid) LEFT JOIN tblsched ON (tblstudsched.schedid=tblsched.schedid) ...
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0answers
22 views

Rebuilding of Index in LogShipping DB in SQL Server 2008 R2 Standard version

Recently I joined the new organization and I am new to Log Shipping. After joining new company I found the fragmentation size of clustered indexes approx 256 indexes more than a 80% and I got the task ...
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0answers
48 views

Help with Joins - Cartesian Product

I have 5 regions that each contain 1 store and 1 warehouse. I have a table that contains the regions and corresponding stores and warehouses. I also have a table that lists the inventories of both ...
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0answers
22 views

Hsqldb and tomcat - permission denied or .lck file not found

I have an app running on tomcat7. For the database purpose, I am using hsqldb(1.8.0.7). In the webapp, I have several sql commands I want to run. However, the schema is not loaded from the app. I do ...
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0answers
27 views

Question? Creating a website that has 2 sets of intermidate tables

I am creating a web site that uses 6 tables from one database in mysql (example) 2 sets of tables that connect to intermediate tables (using foreign keys to join the tables). 1) Category -> ...
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43 views

SSIS Dataflow Task issue, moving data from SQL Server 2008 to MySQL via ADO.Net

Can you please help me in getting this problem solved.. I'm trying to build a SSIS package where I'm moving the data from SQL Server 2008 to MySQL. However I'm getting a weird problem in dataflow ...
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0answers
24 views

Is there a DDL/DML statement auto checking tool?

As a DBA, before applying DDL/DML statement written by developers to an online database I have to analyse and check potential limits or danger in these statements, such as: 1.whether a "create ...
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0answers
23 views

Sub queries in Apache Hive

I have a table with following structure col1 col2 col3 col4 category 300 200 100 20 1 200 100 30 300 2 400 100 100 70 1 100 30 200 100 ...
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0answers
95 views

Oracle - Slow queries without prepending schema name or providing hint

I am logged in as the schema owner in Oracle 11gR2 on Linux. I have 55 million rows in table. select max(col) from table; - takes 300 seconds (index full scan) select max(col) from schema.table; - ...
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13 views

PostgreSQL query slow when using tsvector and ORDER BY despite having index

Running on a large database (around 1.5G) The following query takes about 70 seconds to run, SELECT x FROM DBText x WHERE x.status = 2 AND x.publishedTime < 4574590406397 AND x.service = ...
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25 views

Advice on MYSQL DELETE on CASCADE, UPDATE on CASCADE features

I have 2 tables called copyrigihtinfo and sourceinfo and many to many to relationship table cp_src_junction with following data. copyrightinfo table cp_pk cp_info 1 copyright (c) 1991-2000, ...
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0answers
25 views

Stored Procedure Issue in Simple Select Statement

Here is my Fiddle Here is My Table : CREATE TABLE IF NOT EXISTS `vehicle` ( `AutoID` int(11) NOT NULL AUTO_INCREMENT, `VehicleCode` varchar(20) NOT NULL, `NumberSeats` int(3) NOT NULL, ...
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0answers
19 views

In Forward Engineering I have an error called 'table does not exist'

This is my forward engineering code. -- MySQL Workbench Forward Engineering SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0; SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, ...