If you have started looking for ways tolearn SQL, you may have noticed the many different dialects of SQL available to learn with some clear (and less clear) distinctions between the different dialects. So where do you begin? Which version of SQL is most helpful to you if you haven’t ...
Consider for example MySQL which allows to have in the SELECT list columns that are not defined in the Group By clause, in which case one row is still being returned per group, however if the column doesn't have unique results then there is no guarantee what will be the output! But wit...
Serverless SQL is a feature of Azure Synapse Analytics that lets you run queries on data stored in Azure Data Lake or Blob Storage whenever you need to. You don’t have to manage any SQL server, which makes it easy to use. It's great for working with large amounts of unstru...
To connect to a MySQL database using SSMS, you need to have the MySQL Server installed and running, and you also need to install the MySQL Connector/NET, which is a library that provides connectivity between .NET applications and MySQL databases. Here are the steps to connect to a MySQL d...
The DIFFERENCE() function compares two SOUNDEX values, and returns an integer. The integer value indicates the match for the two SOUNDEX values, from 0 to 4.0 indicates weak or no similarity between the SOUNDEX values. 4 indicates strong similarity or identically SOUNDEX values....
generally in sql server we are using the terms SPID and session_id . can i know what is the difference between them ? Thanks. All replies (1) Tuesday, October 9, 2018 2:06 PM ✅Answered https://dba.stackexchange.com/questions/145032/differences-between-spid-and-session-id Please use ...
SQL数据库是基于表的,而NoSQL数据库是基于文档的,键值对,图数据库或宽列存储。这使得关系SQL数据库成为对于需要多行事务的应用程序(例如会计系统)或为关系结构构建的遗留系统的更好选择。 SQL数据库的一些示例包括MySQL,Oracle,PostgreSQL和MicrosoftSQL Server。NoSQL数据库示例包括MongoDB,BigTable,Redis,RavenDBCassa...
MySQL:SQL syntaxes and stored procedures PostgreSQL:Advanced procedures and stored procedures Supported index type MySQL:Binary Search Tree (B-Tree) PostgreSQL:Many, including GIN and Hash Encryption between client and server MySQL:Transport Layer Security (TLS) protocol ...
In this tutorial, we’ll explore and understand, with practical examples, the differences between CTEs and subqueries. This tutorial uses the PostgreSQL database for the practical use case examples. In addition, this applies to MySQL and SQL Server. ...
Well, it turns out we were wrong. We quickly realized that MySQL decided thatUTF-8 can only hold 3 bytes per character(as it's defined as an alias of utf8mb3). Why? no good reason that I can find documented anywhere. Few years later, when MySQL 5.5.3 was released, they introduced...