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The AND operator is used to combine multiple conditions in a WHERE clause. Example: SELECT * FROM Users WHERE firstName = 'John' AND lastName = 'Doe';

The CASE statement is used to create different outputs based on conditions. Example: SELECT CASE WHEN Age < 18 THEN 'Minor' WHEN Age >= 18 THEN 'Adult' END FROM Customers;

The IN operator allows you to specify multiple values in a WHERE clause. Example: SELECT * FROM Customers WHERE Country IN ('Germany', 'France', 'UK');

The IS NULL operator is used to test for empty fields in a column. Example: SELECT * FROM Customers WHERE FirstName IS NULL;

The LIKE operator is used in a WHERE clause to search for a specified pattern in a column. Example: SELECT * FROM Customers WHERE Country LIKE 'S%';

The NULL keyword is used to test for empty values in a column. Example: SELECT * FROM Customers WHERE PostalCode IS NULL;

The WHERE clause is used to filter records that fulfill a specified condition. Example: SELECT * FROM Users WHERE age > 30;

The OR operator is used to filter records where at least one of the conditions is true. Example: SELECT * FROM Users WHERE firstName = 'John' OR firstName = 'Jane';

The BETWEEN operator selects values within a given range. Example: SELECT * FROM Products WHERE price BETWEEN 10 AND 20;