This site will help everyone to gain or improve skills in building SQL Data Manipulation Language statements. To train You will have to build yourself the SQL statements for retrieval or modification of specific data… · exercises, sql, data, query, may

Knowing SQL is a must for Data Scientists + other analytics professionals, but how can R users start practicing their SQL skills in a familiar environment? That’s this post! Last week, I shared about how I use R for… · data, spatial, austin, covid, sql

লেখক ও কন্ট্রিবিউটরদের তালিকা বিস্তারিত এখানে ডাটাবেস ম্যানেজমেন্ট সিস্টেম (DBMS) হল সফটওয়্যার নিয়ন্ত্রিত একটি ব্যবস্থা যার মাধ্যমে ডাটাবেস পরিচালনা, তথ্যের স্থান সংকুলান, নিরাপত্তা, ব্যাকআপ, তথ্য সংগ্রহের অনুমতি… · dbms, mysql

SQL seems to be complex but it is not! SQLforDevs.com shares actionable SQL knowledge relevant for developing applications.

The easiest way to learn SQL

Mainly notes to myself and writing to think out loud. Today I spent some time learning about SQL common table expressions (aka “CTEs”). I already use subqueries, so they were easy to understand. The syntax is very… · today, table, select, col1, cte1

There are times with your web application where you want to switch a database column. Perhaps you discovered that the data sits better on a different table or perhaps the data stored in that single column needs to be… · column, application, data, there, old

Writing SQL is fun, but it can be frustrating. One of them is encountering NULL, and you might frown and think, “this is not what I want.” If you have such time, I hope this “Deep Dive with Null of SQL” will help you… · transforms, sql, merge, join, part

Convert Tables, Views, DDLs, SQL translator from Teradata, SQL Server, Oracle, Redshift, Hive, Snowflake, BigQuery Migration

1Keydata provides free online programming language and database-related tutorials. Learn SQL, CSS, HTML, and Data Warehousing.

School: Hi, this is your son's school. We're having some computer trouble. Mom: Oh, dear -- Did he break something? School: In a way. Did you really name your son Robert'); DROP TABLE Students;--? · school, mom, son, did, hope

Code first: This simple SQL query will return the size of all databases of your MySQL Server, listing the largest… All of sudden SQL Server Management studio gives me the following error message when I’m trying to browse… · sql, server, following, different, code

Making GROUP BY a bit easier to use is in my experience among the top three requested features in SQL. It’s been a while since SQL:2023 was published, and work on the SQL standard continues. Nowadays, everyone in the… · sql, postgresql, making, bit, requested

Turning impossibilities into 1s and 0s As kind of a follow up to Search SQL Server database triggers for table name, I needed to search for some text that was used to throw an exception in my SQL Server database, but it… · object, module, search, sql, text

One of the two SQL Server Speakers of Professional Association for SQL Server in SQLPASS Lahore General Conference. (http://lahore.sqlpass.org/Home.aspx?EventID=5615) 9+ Years of Database Development & Administration experience with Medical Billing, Start up & Financial Companies Microsoft® Certified Solutions Expert: Data Management and Analytics (SQL Server 2012/2014) Microsoft® Certified Solutions Expert: Data Platform (SQL Server 2012/2014)

July 14, 2025 by Kenneth Fisher I recently had to copy an Azure SQL database (SQL db) from one subscription to an Azure SQL Server instance … Continue reading Category: Cloud, Microsoft SQL Server, Powershell, SQL… · sql, azure, database, tuesday, kenneth

I ran into an interesting problem with SQL the other day: how do you update multiple rows while maintaining an uniqueness constraint? I have a table where each row describes an item in an ordered list. Each row has a… · position, solution, each, row, space

Updated on October 4, 2025 to detect INTEGER/REAL/TEXT column types. Here’s a quick bash script to convert a .csv file into a .sqlite file so you can query your CSV data in tools like TablePlus. The file size is only… · csv, file, sqlite, bash, query

Enter your email address to follow this blog and receive notifications of new posts by email. Posted by blakhani on December 10, 2019 In this blog we are sharing an issue which can be seen while querying external table… · sql, server, error, 2019, table

by Saleem Hakani | Feb 2, 2021 | Uncategorized At times when transferring data from one database to other using either Import Export wizard or using SQL Server Integration Services, you may encounter the following error… · saleem, hakani, feb, 2021, uncategorized

I would like to thank all the participants of T-SQL Tuesday #189. If I missed your post, it was not intentional. Please let me know, and I will add it to this list. I am proud of this community and feel lucky to be a small part of it. I admire everyone who joined the blog party and shared their…

Don’t know if you are all aware of that, but just to make sure… SQL 2014 introduced a new cardinality estimator that gets automatically activated once you switch the compatibility level to 120. In general this is a very… · locks, down, transaction, cardinality, estimator

This whole post is an off-topic shower-thought type of post, and has nothing to do with SQL Server. But as a fellow technologist, I think you might enjoy it anyway. This is a topic that I’ve been passionate about for… · sql, server, features, json, post

The world's most complete and reliable collection of Microsoft SQL Server version numbers

You don't need any experience of SQL or coding for this course. We'll take it slowly and build the solid groundwork you'll need to get up to speed with SQL. Then you can practice at your own pace with some interactive… · sql, need, course, some, don

Okay so I already posted a round up post for this month. You can see it here. Tonight one of the participants, Rob Farley (Blog | Twitter) made me aware of the fact that I missed a HUGE opportunity in making the round up… · month, power, round, report, share

Author: Gail 20 April 2021 0 Comments I realised the other week, that despite a bunch of posts on indexes over the years, I’ve never written a blog post on Columnstore indexes. Time to fix that. Here’s everything you… · indexes, index, columnstore, page, other

The Internet seems to have trouble telling you how to load an arbitrary comma separated values datafile into a database. Assuming the CSV has a header row, and given sqlite3 doesn’t know or care about data types, this… · had, desktop, internet, seems, trouble

I meant to write this almost a year ago, but then I was asked to take a look at high… It feels like only yesterday I was complaining about Sentinel One trying to take the crown for shittiest security software.… There’s… · take, meant, write, almost, year

Categories and Subcategories 2007-03-13The adjacency model · categories, subcategories, 2007, 13the, adjacency

Transform the way you work with SQL Databases in Go · transform, way, work, sql, databases

On-Disk & In-Memory Pages that teach you the SQL way of life!

.astype(int) でも変換できるが、欠損値が含まれている場合エラーが発生し変換が行われない。 to_numeric の errors を使うことで数値に変換できるものは変換し、それ以外のものは NaN に変換する。 errors は、"ignore", "raise", "coerce" の３つの値をとる。 dataanalystkun 2023-03-08 12:36 読者になる 会社のDBにメディアのGA（Goole… · errors, astype, int, numeric, nan

I was recently involved in a project using PostgreSQL on Linux where my goal was to “sprinkle some devops” on the database development process by getting the database schema in source control and automating the schema… · schema, tools, sql, based, postgresql

This site will help everyone to gain or improve skills in building SQL Data Manipulation Language statements. To train You will have to build yourself the SQL statements for retrieval or modification of specific data… · exercises, sql, data, query, may

My random thoughts on SQL. If I can help you do your job better, then I've succeeded in my mission!

E資格の意義や価値、助成金の受け方等、合格者目線で振り返ります Error in validObject: 'counts' must have the same cells as 'data' · error, validobject, counts, must, same

The world's most complete and reliable collection of Microsoft SQL Server version numbers

Welcome to the home of a bunch of SQL Server User Groups.  This network of websites collectively known as the SQL User Group Sites (www.sqlugs.com) is a setup for SQL Server User Groups to use to set up their own home page for their user group free of charge. With their free site, they get […]

Paul Turley's Power BI and SQL Server BI Blog: Sharing my experiences with the Microsoft data platform, SQL Server BI, Data Modeling, SSAS Design, Power Pivot, Power BI, SSRS Advanced Design, Power BI, Dashboards & Visualization since 2009

I can’t seem to write any personal blog posts, but I did write a 484 page book! Oh well, life goals 🙂 “The journey of a thousand miles begins with a single step.” – Lao-tzu I can’t seem to write any personal blog posts… · write, seem, personal, blog, posts

I was talking to a friend of mine and they are learning some SQL and they said something that I have seen come up multiple times in learning SQL. They said “Yeah, I need to study the join types more. They make sense to… · sql, join, right, joins, learning

LIKE many Sql programmers I prefer the SQL approach to solve most of the problems I face doing my job. Now I'm trying to share scripts and other things.

Toto macau 4D merupakan bandar toto macau yang menyediakan hasil keluaran macau tercepat hari ini dan hasil result macau yang cepat dengan data macau yang lengkap.

I often compile old versions of MySQL, MariaDB, Postgres and RocksDB in my search for performance regressions. Compiling is easy with Postgres as they do a great job at avoiding compilation warnings and I never encounter… · rocksdb, files, patch, versions, read

何年か SQL を業務で書いてきたが、しっかり勉強したことがなかった。中級者レベルの自負。 世界一流エンジニアの思考法 (文春e-book) を読んで、脳の負荷を下げるために基礎を再構築したかった。また、レベルの高い技術書の積本を崩すための基礎づくりでもある。 SQL の基本的な操作から始まり、単純な CRUD で使われるような SQL… · sql, select, count, distinct, customer

Cross Database Migration and Synchronization for MSSQL, SQL Azure, MySQL, Oracle, Access, SQLite, PostgreSQL, MS FoxPro

Das Systemhaus, welches sich vollständig auf die Datenbanktechnologien des Microsoft SQL Server fokussiert hat. Planung-Realisierung-Pflege

Working in a technical field has it’s ups and downs. One of the more common annoyances I run into is people that can either not explain what they mean in simple terms or that choose not to in order to appear… · page, fill, factor, data, row