What is the AND operator in SQL? | How to use '&' in SQL?Can we use && in SQL?

Описание: What is the AND operator in SQL?
How to use '&' in SQL?
Can we use && in SQL?
एसक्यूएल में '&' का उपयोग कैसे करें?

SQL AND Operator

The SQL AND Operator
The WHERE clause can contain one or many AND operators.

The AND operator is used to filter records based on more than one condition, like if you want to return all customers from Spain that starts with the letter 'G':

ExampleGet your own SQL Server
Select all customers from Spain that starts with the letter 'G':
SELECT *
FROM Customers
WHERE Country = 'Spain' AND CustomerName LIKE 'G%';
Syntax
SELECT column1, column2, ...
FROM table_name
WHERE condition1 AND condition2 AND condition3 ...;

AND vs OR
The AND operator displays a record if all the conditions are TRUE.

The OR operator displays a record if any of the conditions are TRUE.

Demo Database
Below is a selection from the Customers table used in the examples:
All Conditions Must Be True
The following SQL statement selects all fields from Customers where Country is "Germany" AND City is "Berlin" AND PostalCode is higher than 12000:

Example
SELECT * FROM Customers
WHERE Country = 'Germany'
AND City = 'Berlin'
AND PostalCode 12000;
Combining AND and OR
You can combine the AND and OR operators.

The following SQL statement selects all customers from Spain that starts with a "G" or an "R".

Make sure you use parenthesis to get the correct result.

Example
Select all Spanish customers that starts with either "G" or "R":

SELECT * FROM Customers
WHERE Country = 'Spain' AND (CustomerName LIKE 'G%' OR CustomerName LIKE 'R%');
Without parenthesis, the select statement will return all customers from Spain that starts with a "G", plus all customers that starts with an "R", regardless of the country value:

Example
Select all customers that either:
are from Spain and starts with either "G", or
starts with the letter "R":

SELECT * FROM Customers
WHERE Country = 'Spain' AND CustomerName LIKE 'G%' OR CustomerName LIKE 'R%';
Test Yourself With Exercises
Exercise:
Select all records where the City column has the value 'Berlin' and the PostalCode column has the value 12209.

FROM Customers
City = 'Berlin'

= 12209;

Start the Exercise

Video: SQL AND Operator

SQL AND Operator
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SQL आरक्षित शब्दों और वर्णों को ऑपरेटर कहा जाता है, जिनका उपयोग SQL क्वेरी में WHERE क्लॉज़ के साथ किया जाता है। SQL में, ऑपरेटर या तो यूनरी या बाइनरी ऑपरेटर हो सकता है। यूनरी ऑपरेटर यूनरी ऑपरेशन करने के लिए केवल एक ऑपरेंड का उपयोग करता है, जबकि बाइनरी ऑपरेटर बाइनरी ऑपरेशन करने के लिए दो ऑपरेंड का उपयोग करता है।
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