SQL Server Tutorial
By Content Medium | 10 Feb 2024 | 518 Words | 393 Views
Introduction to SQL
Welcome to SQL tutorial! SQL stands for Structured Query Language, and it is used to speak with relational databases. In this tutorial, we will cover some fundamental SQL instructions and concepts.
SQL Server Version history
Here's a brief history of SQL Server versions:
| Version | Features |
| SQL Server 1.0 (1989) | The first version of SQL Server, it was designed for OS/2. |
| SQL Server 4.2a (1993) | This version added support for Windows NT and improved security features. |
| SQL Server 6.0 (1995) | This version introduced new features like stored procedures, triggers, and views. |
| SQL Server 7.0 (1998) | This version introduced a new query processor and improved performance. |
| SQL Server 2000 (2000) | This version added new features like DTS (Data Transformation Services) and XML support. |
| SQL Server 2005 (2005) | This version introduced new features like SQL CLR integration, XML data type, and common language runtime (CLR) integration. |
| SQL Server 2008 (2008) | This version added new features like FILESTREAM data type, table-valued parameters, and improved compression. |
| SQL Server 2008 R2 (2010) | This version introduced new features like Master Data Services, PowerPivot for Excel, and StreamInsight. |
| SQL Server 2012 (2012) | This version added new features like AlwaysOn Availability Groups, columnstore indexes, and sequence objects. |
| SQL Server 2014 (2014) | This version introduced new features like In-Memory OLTP, JSON support, and enhanced columnstore indexes. |
| SQL Server 2016 (2016) | This version added new features like Query Store, PolyBase, and enhanced JSON support. |
| SQL Server 2017 (2017) | This version added new features like graph data processing, Python integration, and support for Linux. |
| SQL Server 2019 (2019) | This version introduced new features like Big Data Clusters, intelligent query processing, and support for UTF-8 character encoding. |
Each new version of SQL Server has brought significant improvements and new features to the platform.
First, let's begin with some simple SQL syntax. SQL instructions are generally written in uppercase, however the key phrases are now not case-sensitive. Here is an example:
SELECT column1, column2, column3 FROM table_name;
This SQL assertion selects records from the columns named "column1", "column2", and "column3" in the desk named "table_name".
Next, let's cover some frequent SQL commands:
SELECT: Used to retrieve statistics from one or greater tables.
SELECT * FROM table_name;
This SQL announcement retrieves all the information from the desk named "table_name".
INSERT INTO: Used to insert new statistics into a table.
INSERT INTO table_name (column1, column2, column3) VALUES (value1, value2, value3);
This SQL declaration inserts new facts into the desk named "table_name" with values for "column1", "column2", and "column3".
UPDATE: Used to regulate current records in a table.
UPDATE table_name SET column1 = value1 WHERE condition;
This SQL declaration updates the desk named "table_name" with the aid of placing the fee of "column1" to "value1" the place the distinctive situation is met.
DELETE: Used to delete facts from a table.
DELETE FROM table_name WHERE condition;
This SQL declaration deletes statistics from the desk named "table_name" the place the particular circumstance is met.
CREATE TABLE: Used to create a new table.
CREATE TABLE table_name (column1 datatype1, column2 datatype2, column3 datatype3);
This SQL declaration creates a new desk named "table_name" with columns named "column1", "column2", and "column3" with their respective statistics types.
That's it for this simple SQL tutorial. Keep in thought that SQL is a effective device with many greater instructions and points than what we have included here. To research more, I recommend searching into SQL assets on line or taking a SQL course.
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