Question

In an SQL query, which of the following symbols is used by ANSI SQL to represent a single unspecified character?

a) _ (underscore)
b) ? (question mark)
c) * (asterisk)
d) % (percent)
e) # (pound)

Answer 1

In an SQL query, the underscore (_) is the symbol used by ANSI SQL to represent a single unspecified character and is often used with the LIKE operator.

Step-by-step explanation:

In an SQL query, the symbol used by ANSI SQL to represent a single unspecified character is _ (underscore). This symbol acts as a placeholder for any single character in a string when performing a search in a database. It is often used with the LIKE operator to define a pattern that the resulting data must match. For example, the SQL query SELECT * FROM users WHERE username LIKE 'J_hn' would match any usernames that start with 'J', followed by any single character, and then followed by 'hn', such as 'John' or 'Jahn'.