Feed: Planet MySQL; Author: Hardik Savani; In this short tutorial we will cover an how to call mysql view in laravel. I’m going to show you about laravel migration create view. Here you will learn laravel migration make view. i explained simply step by step how to use mysql view in laravel. Let's see bellow example laravel using mysql views.In this post, i will show you how to create mysql view using laravel migration and how to use mysql view with laravel eloquent model.basically, we are using sql view because we don't require to write long query on our database ... Read More

Feed: Domo Blog. Author: Scott Townsend. In the first half of 2020, every business’s ability to learn and adapt was put to the test. As a result, a seismic shift is occurring in the way data and business intelligence drive strategic initiatives and create the ability to respond to whatever comes next, quickly and precisely. The rise of data science and artificial intelligence is at the heart of this movement, as businesses start to understand that these technologies give them the ability to predict what’s coming next. This rise is particularly pronounced in the world of retail, as I learned ... Read More

Feed: SAS Blogs. Author: Jeffrey Cooper. Tax administration amid COVID-19 requires analytics to navigate uncertain revenues and massive fraud potential In the early days of the COVID-19 pandemic, the issue of tax administration was low on the agenda for most. Beyond the obvious public health concerns, most business and government leaders were focused on how best to keep businesses afloat. But for those in federal, state and local governments responsible for delivering services on already-tight budgets, tax administration has always remained a top priority – and that has only intensified with each round of stimulus packages. Now, from the IRS ... Read More

Feed: Planet PostgreSQL. Postgres has a number of different index types. You’ve got B-Tree, GIN, GiST, Sp-GiST, and BRIN. BRIN is a lightweight index that often goes misunderstood. When implemented correctly, it offers significant benefits such as space savings and speed. However, when implemented incorrectly, it loses some of its benefit, so it's important to look at some of the reasons a BRIN index might not be right for you.BRIN Overview  A BRIN is a Block Range Index. A block is Postgres’ base unit of storage and is by default 8kB of data.  BRIN samples  a range of blocks (default ... Read More

Feed: R-bloggers. Author: Swimming + Data Science. This week in the High School Swimming State-Off Tournament we have the third seeded Sunshine State, Florida (3) taking on the sixth seeded Illinois (6) aka the Prairie State.library(SwimmeR) library(dplyr) library(stringr) library(purrr) library(flextable)Florida ResultsFlorida has a nice results repository, with Hy-Tek real-time results. This will then be similar to last week when we first scraped a Hy-Tek real-time results page. This time though we’re going to scrape four, one for each of Florida’s four divisions.base_4A % # map SwimmeR::read_results over the list of links map(swim_parse) %>% bind_rows() %>% # bind together results from ... Read More

Feed: Planet PostgreSQL. The table partitioning feature in PostgreSQL has come a long way after the declarative partitioning syntax added to PostgreSQL 10 by Amit Langote. The partitioning feature in PostgreSQL was first added by PG 8.1 by Simon Rigs, it has based on the concept of table inheritance and using constraint exclusion to exclude inherited tables (not needed) from a query scan. The exclusion constraint will basically do the pruning of tables based on the query filter. Before declarative partitioning https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=f0e44751d7175f was added to PG, it meant that the child partitions, constraints and triggers etc needed to be created ... Read More

Feed: MariaDB Knowledge Base Article Feed. Author: . Basic idea Consider a query with a WHERE clause: WHERE col1=col2 AND ... the WHERE clause will compute to true only if col1=col2. This means that in the rest of the WHERE clause occurrences of col1 can be substituted with col2 (with some limitations which are discussed in the next section). This allows the optimizer to infer additional restrictions. For example: WHERE col1=col2 AND col1=123 allows to infer a new equality: col2=123 WHERE col1=col2 AND col1 < 10 allows to infer that col2<10. Identity and comparison substitution There are some limitations to ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Kevin Mekulu. Monte Carlo simulation is one of the most important algorithms in quantitative finance Monte Carlo simulation can be utilized as an alternative tool to price options ( the most popular option pricing model is based on the Black-Scholes-Merton formula) Before demonstrating the implementation of the Monte Carlo algorithm, it’s important to fully comprehend the science behind it. Simply put, Monte Carlo simulation generates a series of random variables that have similar properties to the risk factors which the simulation is trying to simulate. The simulation produces a large number ... Read More

Feed: R-bloggers. Author: Jerry Tuttle. [This article was first published on R-posts.com, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.ROC for Decision Trees – where did the data come from?By Jerry Tuttle      In doing decision tree classification problems, I have often graphed the ROC (Receiver Operating Characteristic) curve. The True Positive Rate (TPR) is on the y-axis, and the False Positive Rate (FPR) is on the x-axis. True Positive is when the lab test ... Read More

Feed: R-bloggers. Author: hrbrmstr. [This article was first published on R – rud.is, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.(This is part 2 of n “quick hit” posts, each walking through some approaches to speeding up components of an iterative operation. Go here for part 1).Thanks to the aforementioned previous post, we now have a super fast way of reading individual text files containing HTTP headers from HEAD requests into a character vector:library(Rcpp) ... Read More