What are wildcards and how are they used in different programming languages?
Wildcards are special characters used in programming to represent one or more characters. They vary by language.
Can you give me examples of wildcards in SQL and Python?
In SQL, '%' represents zero or more characters, while '_' represents a single character. In Python, you can use '*' in functions like 'fnmatch'.
Are there wildcards in JavaScript?
JavaScript doesn't have built-in wildcard support, but you can use regular expressions for similar functionality.
How do wildcards affect performance in queries?
Using wildcards can slow down queries, especially if used at the beginning of a string, as it requires scanning more data.
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