Which Operator Performs Pattern Machining In SQL ?

A) BETWEEN operator

B) LIKE operator

C) EXISTS operator

D) None of these

Which Operator Performs Pattern Machining In SQL?

Answer. Option B) Like Operator is the Correct Answer.

In SQL, the operator that performs pattern matching is the “LIKE” operator. The “LIKE” operator is used to match values in a column against a specific pattern, where the pattern can include wildcard characters to represent unknown or variable characters.

The basic syntax of the “LIKE” operator is as follows:

SELECT column_name(s)
FROM table_name
WHERE column_name LIKE pattern;

In the “pattern,” you can use “%” to match any sequence of characters (including none), and “_” to match any single character. Here are a few examples:

• LIKE 'a%' matches any value that starts with “a”.
• LIKE '%a' matches any value that ends with “a”.
• LIKE '%or%' matches any value that contains “or”.
• LIKE '_r%' matches any value that has “r” as the second character.

For instance:

SELECT * FROM customers
WHERE customer_name LIKE 'J%';

The above query retrieves all rows from the “customers” table where the “customer_name” column starts with the letter “J”.

It’s important to note that the “LIKE” operator in SQL is specifically designed for pattern matching within the context of database queries and works with string data. If you’re dealing with pattern matching in a general-purpose programming language like Java, you would use regular expressions or other language-specific features for this purpose.