Tag: row

Feed: R-bloggers. Author: Alastair Rushworth. Exploring categorical data with inspectdf What’s inspectdf and what’s it for? I often find myself viewing and reviewing dataframes throughout thecourse of an analysis, and a substantial amount of time can be spentrewriting the same code to do this. inspectdf is an R package designedto make common exploratory tools a bit more useful and easy to use. In particular, it’s very powerful be able to quickly see the contents ofcategorical features. In this article, we’ll summarise how to use theinspect_cat() function from inspectdf for summarising andvisualising categorical columns. First of all, you’ll need to have ... Read More

Feed: Planet PostgreSQL. PREVIOUS POST There is a wide variety of indexes available in PostgreSQL. While most are common in almost all databases, there are some types of indexes that are more specific to PostgreSQL. For example, GIN indexes are helpful to speed up the search for element values within documents. GIN and GiST indexes could both be used for making full-text searches faster, whereas BRIN indexes are more useful when dealing with large tables, as it only stores the summary information of a page. We will look at these indexes in more detail in future blog posts. For now, ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Benjamin Waxer. Dramatically improving currency trading models with AI using Keras Deep Learning and PivotBillions. As has become more and more apparent in this day and age, data is scaling and changing beyond the ability of human-powered machine learning to make the most of it. This makes enhancing current analyses with deep learning all the more necessary and profitable. Our team invested heavily in developing a trading model that could continue to trade profitably in the currency exchange markets. Though we succeeded in developing such a model, there was still a ... Read More

Feed: Hadoop Dev. Author: Nagapriya Tiruthani. Announcing the immediate availability of Db2 Big SQL on Cloudera platform.  Extending the support on Hadoop platforms, Db2 Big SQL will now add support to Cloudera Distributed Hadoop (CDH) v5.x platform along with Hortonworks Data Platform (HDP) v2.6 & v3.1 Db2 Big SQL is an advanced SQL engine optimized for advanced analytics in a Big Data environment. IBM infuses the power of industry leading Db2 in open source technologies for machine learning, interactive and batch analytics use cases. With Big Data, there is overwhelming amount of data but unless you plan and execute the ... Read More

Feed: Databasejournal.com - Feature Database Articles. Author: . The advent of JSON (JavaScript Object Notation) has changed application programming, and, because of this, database vendors are adapting their products to make JSON easier to use within the database. Oracle is no exception, and with releases from 12.2 onwards Oracle has made JSON easily accessible from the PL/SQL engine. Even though JSON functionality is available in version 12.1, the enhancements implemented from 12.2 onward make JSON even easier to use. And, sometimes, making things easier can also break existing implementations. In this article, you’ll learn about what changed and how those ... Read More

Feed: Planet MySQL; Author: ScaleGrid.io; Ready to transition from a commercial database to open source, and want to know which databases are most popular in 2019? Wondering whether an on-premise vs. public cloud vs. hybrid cloud infrastructure is best for your database strategy? Or, considering adding a new database to your application and want to see which combinations are most popular? We found all the answers you need at the Percona Live event last month, and broke down the insights into the following free trends reports: 2019 Top Databases Used So, which databases are most popular in 2019? We broke down the data ... Read More

Feed: Planet MySQL; Author: Severalnines; This blog is aimed at explaining an overview of cross replication between PostgreSQL and MySQL, and further discussing the methods of configuring cross replication between the two database servers. Traditionally, the databases involved in a cross replication setup are called heterogeneous databases, which is a good approach to move away from one RDBMS server to another. Both PostgreSQL and MySQL databases are conventionally RDBMS databases but they also offer NoSQL capability with added extensions to have the best of both worlds. This article focuses on the discussion of replication between PostgreSQL and MySQL from an ... Read More

Feed: Planet MySQL; Author: Krunal Lathiya; SQL JOINS Tutorial For Beginners | SQL JOINS Example is today’s topic. SQL is the special-purpose programming language designed for managing information in the relational database management system (RDBMS). The word relational is key; it specifies that the DBMS is organized in such a way that there are clear relations defined between the different sets of data. SQL joins are used to combine the records from two or more tables in a database. SQL JOIN clause is used to combine the rows from two or more tables, based on a related column between them. Content ... Read More

Feed: SAS Blogs. Author: Rick Wicklin. For linear regression models, there is a class of statistics that I call deletion diagnostics or leave-one-out statistics. These observation-wise statistics address the question, "If I delete the i_th observation and refit the model, what happens to the statistics for the model?" For example: The PRESS statistic is similar to the residual sum of squares statistic but is based on fitting n different models, where n is the sample size and the i_th model excludes the i_th observation. Cook's D statistic measures the influence of the i_th observation on the fit. The DFBETAS statistics ... Read More

Feed: Cloud Data Transformation Software | Matillion. Author: Laura Malins, ETL Product Manager; Laura Malins, ETL Product ManagerAt their recent summit, Snowflake announced support for External Tables. This represents an advancement in data storage as users can now store, query and manage data both in their Snowflake data warehouse and out in object cloud storage. External Tables allow Snowflake users to query data across their Snowflake cloud data warehouse and data in external storage objects, bringing users closer to their data, in a performant and cost efficient manner. We are happy to announce that External Tables are fully supported in ... Read More