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SQL Installing SSMS
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SQL Syntax
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SQL Datatype
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SQL Database
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SQL Table
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SQL Select
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SQL Distinct
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SQL Count
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SQL Top
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SQL Aliases
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SQL In
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SQL Insert
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SQL Update
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SQL Null
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SQL Like
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SQL Wildcards
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SQL Nested Query
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SQL Between
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SQL Unique
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SQL Primary Key
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SQL Foreign Key
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SQL Check
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SQL Default
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SQL Database Diagram
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SQL Stored Procedures
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SQL Joins
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SQL Inner Join
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SQL Left Join
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SQL Right Join
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SQL Full Join
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SQL Trigger
Introduction to SQL
SQL, or Structured Query Language, is a powerful language for managing and manipulating data in relational databases. It allows you to interact with databases to store, retrieve, update, and delete data. SQL is used in various applications, including web development, data analysis, and business intelligence. In this introduction, I’ll provide a simple and easy-to-understand explanation of SQL concepts and commands.
What is SQL?
– SQL stands for Structured Query Language
– SQL lets you access and manipulate databases
– SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987
Example
SQL statements are instructions used to communicate with the database. SQL can perform tasks like creating tables, adding data, modifying tables, and more. An example SQL statement is:
SELECT “column_name” FROM “table_name”;
What Can SQL do?
- SQL can execute queries against a database
- SQL can retrieve data from a database
- SQL can insert records in a database
- SQL can update records in a database
- SQL can delete records from a database
- SQL can create new databases
- SQL can create new tables in a database
- SQL can create stored procedures in a database
- SQL can create views in a database
- SQL can set permissions on tables, procedures, and views
SQL is not just another language; it’s the boss of data management. Here’s why it’s important:
Everyone Understands It: SQL is like a universal language for databases. It works with many types of databases, so you don’t need to learn a new language for each one.
It’s Fast: SQL is like a speedy racer. It can find information quickly, even if there’s a lot of data.
Keeps Data Safe: SQL is like a security guard. It makes sure only the right people can see and change the data.
Works for Big and Small: SQL is like a flexible tool. It’s great for small businesses and big companies with lots of data.
To sum it up, SQL is like your best buddy when it comes to dealing with data. It helps you talk to databases easily and do all sorts of important tasks
What is an SQL Server?
SQL Server, also known as MS SQL Server or Microsoft SQL Server, is a relational database management system (RDBMS). It’s a program that saves database information and runs SQL commands and queries to alter a relational database. Furthermore, it manages and executes all database activities.
SQL is a query language, while SQL Server is a database management system. SQL is a query language for working with a relational database, while SQL Server is proprietary software that performs SQL queries. Additional features and functionalities enable the user to interface with the database effectively and efficiently complete all database operations
Asking Questions: SQL is like a detective that can find specific information from a database. You can ask it to find and show you particular data, like names of people in a certain department:
SHOW ME the names of people in the IT department.
Changing Stuff: SQL isn’t just for reading data; it’s also for making changes. You can use it to add new things, update existing things, or remove stuff from the database. For example:
ADD a new person named John Doe to the list of customers.
Creating Databases and Tables: Think of SQL as a builder. You can use it to make new databases and decide how tables inside those databases should look. It’s like designing the blueprint for your data house:
BUILD a table for products with spaces for ID, name, and price.
Controlling Who Does What: SQL lets you decide who can enter the data house and who can’t. It’s like having keys to a room, and you can decide who gets a key.
Making Procedures and Views: SQL is also good at creating plans and nice views. It can make lists or charts to show data in a neat way.
Course Video
YouTube Reference :
1) Introduction to SQL Server in Hindi/Urdu
2) Introduction to SQL in English
