'Extract, Transform and Load': Data load processing, normally in the context of data warehouse systems.

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How to load .dat files to oracle database

I have .DAT files extracted from telecom switch. I want to upload this file to an Oracle server using IBM data-stage ETL tool. Unfortunately these files are not readable format. This is a picture ...
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0answers
30 views

Best way to run an ETL on a production MongoDB database

We have the following environment: 3 servers + 3 replica set servers Each server has 3 shards Our main collection has around 40,000,000 documents that average at around 6kb Our shard key is ...
0
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0answers
25 views

Tracking row level status of SSIS ETL process

I have an ETL Process in SSIS in which I am loading around 150 tables in each run - Truncate and Insert. I have four packages each from different sources. Each package loads different tables. ...
16
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3answers
10k views

Are regular VACUUM ANALYZE still recommended under 9.1?

I'm using PostgreSQL 9.1 on Ubuntu. Are scheduled VACUUM ANALYZE still recommended, or is autovacuum enough to take care of all needs? If the answer is "it depends", then: I have a largish database ...
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1answer
41 views

Insert/ Update Scalability (more records, continually longer lookups — solution?)

posted this before but never received a clear answer. I'm working on an ETL project and am basically feeding JSON records of "tickets" into a MySQL database. (actually come to think of it, may be ...
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1answer
37 views

How to keep the data warehouse synchronised with the source systems? [closed]

I'm a DBA who is responsible for exporting data from an ERP system for Business Intelligence purposes. The data from ERP system is being sent to the data warehouse and they are used in the ETL ...
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2answers
76 views

SSIS import data or insert data if no match

I have a situation in which I need to import data from one table to another. The challenge here is in tables I have some columns which are references to other table values (kind of foreign key). I ...
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4answers
453 views

Looking for ideas on maintaining data warehouse in close to real-time - ETL tools, etc

I have done a fair number of traditional data warehouse implementations where the loads were done in a batch-oriented manner, i.e. the data is refreshed nightly or, at most, every few hours. I now ...
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1answer
52 views

SSIS Transaction Problem

I am trying to use SQL transaction with my SSIS package so if any error comes changes are rollback. I am using an "Sequence Container" in Control Flow for this and setting its "Transaction Option" to ...
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2answers
76 views

Process staging table by getting unique rows only (incremential)

I had simple problem with etl on staging table that was answered here: Process staging table by getting unique rows only Now after apllying solution I spotted that will be unusable in production ...
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1answer
52 views

Process staging table by getting unique rows only [closed]

I have several staging tables where I bulk import data with duplicates and sometimes I upload historical data mixed with real-time data, just importing everything without caring if it is already in ...
3
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1answer
80 views

Metadata Headache

A process that I don't have control over is dropping and re-creating tables in a MySQL database every night. This wouldn't be a problem (I think), if it re-created the tables identically every time. ...
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1answer
125 views

SSIS Multicast performance question

I'm wondering how multicast actually works. So here is my setup. I have one source flat file(csv) of about 100k rows, maybe about 250-300 columns, and I'm multicasting that file into 7 one-to-one ...
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1answer
581 views

SSIS Packages with SQL Server Express 2008 R2

I understand from various questions [1] [2] that SQL Server Express 2008 R2 doesn't support SSIS packages and that there's only primitive support for ad-hoc data imports / exports. I have already got ...
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0answers
83 views

ETL - Moving data from Postgres/Oracle to a TripleStore (RDF)

I'm looking for pointers on how to handle an ETL process that I have to implement for my organization. I know how to query SQL database but i'm not SQL DB specialist. I work more in the sphere of the ...
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3answers
318 views

How to load multiple values in cell from Excel to SQL Server many to many table [closed]

I have values in excel like this. StudentNumber| Subjects 1| english, science, maths 2| maths, biology 3| history, zoology I have Student table in database ...
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0answers
36 views

Tables with same schema in DB for different sources. Bad pattern?

The main purpose of the system being developed is to collect data from different sources, process and standardize it, and then add it to the DB. After information from all sources is collected it ...
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2answers
4k views

ETL: extracting from 200 tables - SSIS data flow or custom T-SQL?

Based on my analysis, a complete dimensional model for our data warehouse will require extraction from over 200 source tables. Some of these tables will be extracted as part of an incremental load and ...
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1answer
322 views

How to compare data between staging and operational tables?

I just want to ask how to compare two database tables, staging vs. operational tables. After we did the transformation and convert it to correct datatype like convert flag column (Y/N) nvarchar to ...
0
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1answer
494 views

How to perform ETL from RDBMS to Neo4j

I have a mature 50+ tables web application based on mySQL. In order to do some advanced data mining I want to use Neo4j and the goodnes of cypher. However I'm having a hard time migrating my data from ...
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2answers
38 views

how to identify why lookup failed in SSIS

i have created an ETL package and having a lookup to match userid in db. i checked in dataviewer what data is going as input to my lookup. the data is correct and the table i used in lookup to match ...
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0answers
944 views

How can I load csv data into mongodb and choose the types I'd like to have created for each column?

I'm looking for a way to load csv data in mongodb and specify the types that I'd like to have created for each column? I've been using mongoimport but I find it quite painful because there doesn't ...
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0answers
108 views

Selectively load data using Oracle 11g r2 External Table Preprocessor

I am using the Preprocessor feature in Oracle 11g r2 to load several data files in a table. However, the raw files seem to have certain rows that shouldn't be imported with the rest. For example: ...
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2answers
179 views

Best Practices for Testing Application Dashboard Data

We have a dashboard that contains metrics based on a 6 month reporting period. Users log in and see their metrics based on the current 6-month reporting period. Every 6 months, we load new metrics ...
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3answers
1k views

ETL: extraction strategy for 200 source databases

What is the best extraction strategy for approximately 200 SQL Server 2005 source databases (same schema) for a daily load into a staging area in preparation for data warehouse cleansing, ...
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3answers
8k views

What are the arguments in favor of using ELT process over ETL?

I realized that my company uses an ELT (extract-load-transform) process instead of using an ETL (extract-transform-load) process. What are the differences in the two approaches and in which situations ...
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2answers
546 views

What is a good solution for reliably transferring data between SQL Server and PostgreSQL? [closed]

In analyzing some of our business data, we're realizing that we need to join data across disparate data sources. For example, our application data is warehoused in Postgres (ported from MongoDB via ...
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1answer
183 views

Clustered Index with nightly ETL process

We have a nightly ETL process that involves data from many different sources being flattened, and loaded into a completely denormalized table on SQL Server 2008 for reporting. The clustered index on ...
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1answer
65 views

How to deal with multiple error columns in data flow

I'm writing a simple package to load data into tables and a I have multiple destinations within the same package. I'm attempting to first attempt batch inserts but want to fall back to row by row in ...
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0answers
674 views

ssis ado.net destination has failed to acquire the connection

I am Transferring data from sql server source db to sql server destination db (cross db). but some times getting error "ssis ado.net destination has failed to acquire the connection.The connection may ...
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0answers
43 views

Merge data using Integration Service

Please Consider this scenario: I have a table in my database. I want move this data in my OLAP database using SSIS.I can move all record from my table to OLAP database.The problem is I don't know how ...
4
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1answer
3k views

MySQL failing and very slow on importing a large file

I have a 47 GB MySQL dump of a single table: http://dumps.wikimedia.org/commonswiki/latest/commonswiki-latest-image.sql.gz I ultimately want it into PostgreSQL, but since I didn't figure out an easy ...
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2answers
83 views

General ETL principle - ETL from unknown number of tables? [closed]

AFAIK, ETL integrates data from a fixed number of sources/tables. Is it possible that ETL can integrate data from an unknown number of tables which might be added in the future, given that these ...
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4answers
368 views

SQL Server: Database integration and synchronization

I have n SQL Server databases with the same data schema. On the other hand i have a web application that needs to retrieve, for some entities, the union of the information stored into the n ...
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4answers
2k views

best ETL design to transfer transaction tables records into the data-warehouse

I have 2 type of tables to populate the data-warehouse with every day, lookup tables or configuration tables with few 100s records, and thats easy where i just truncate and refill the table. but for ...
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0answers
44 views

Data Integration [closed]

This is not exactly a DBA question but definitely a DB question and I think StackExchange DBA is my best bet for this question. Here I go : are there any frameworks ( free / open source preferred ) ...
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1answer
341 views

Large difference in disk space used by partitions

I have a partitioned table that contains about 155 million records total. It's partitioned by year and the partitions for both the current and previous years contain about 25 million records each. ...
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69 views

Inserting Records - How to get next incremented PK for each insert

I'm using spoon to look for Devices that have several attributes that define its location, and then create a Cabinet in that location if one doesn't exist. Is there an operation that lets me get a ...
4
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1answer
5k views

Importing a large column (8000 chars) from Excel using SSIS

I'm trying to set up a regular import of an excel spreadsheet that we get from a vendor. I'm using SQL 2008 R2 SSIS to import it into a table. The problem connection manager is an OLE DB connection ...
3
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1answer
101 views

Replace column values?

I recently got into SSIS and haven't been able to find what I am trying to achieve anywhere on the web. I am trying to take some rows as input, and then replace one specific column's value with ...
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7answers
7k views

Any Open Source / free ETL out there? [closed]

I was using Pentaho Data Integration even before Pentaho bought it and call it that. I have the last free version. I went on their website recently to see if they had released another version only to ...
3
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2answers
874 views

Is this a good strategy for importing a large amount of data and decomposing as an ETL?

I have a set of five tables (a highly decomposed schema for an ETL if I understand the nomenclature) that I'm going to load via bulk import, then run some inserts from those five tables into a SLEW of ...
7
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3answers
130 views

Tablespace on ephemeral storage

For performance reasons in some scenarios, e.g. Amazon EC2, you have access to a faster and cheaper storage device, which loses all its data on reboots, so it is called "ephemeral". This question is ...
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1answer
117 views

Tips for catching changes in table data over time interval for export to Data Warehouse

I've recently been tasked with exporting data from one of our databases to a central Data Warehouse. The export is supposed to be incremental since a full load every 24 hours would be a massive waste ...
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0answers
133 views

Transfer data from DynamoDB to SQL server 2008?

I want to transfer data from amazon dynamo DB to SQL server 2008. What are the tools or methods which can be used to do this ?
3
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0answers
622 views

SSIS Recordset Destination error

I have an SSIS package targeted at SQL Server 2012. I have it deployed into the Stored Packages in Integration Services and then have a SQL Server Agent job which executes it. The first part of the ...
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2answers
3k views

Advice for ETL from Oracle to SQL Server?

I'm building a data mart in SQL Server which needs to extract each month from an Oracle database. Currently this is done by exporting to flat files, then running all the inserts/updates in SQL ...
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4answers
9k views

Quick way to validate two tables against each other

We're doing an ETL process. When all is said and done there are a bunch of tables that should be identical. What is the quickest way to verify that those tables (on two different servers) are in ...
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1answer
335 views

How do I debug an ETL process that is unable to commit any records?

I used a DB link to connect to another DB and delete a couple of records. Later I ran an Informatica Workflow (ETL tool) to load data into that database using a DB connection that connects directly to ...
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1answer
109 views

Expanding contractions/number ranges into separate records [closed]

I am planning the migration of a directory of image files plus a FileMaker-database containing the corresponding metadata into an Imagic IMS database (formerly known as ImageAccess). The vendor ...