What are wildcards and how are they used in different systems?
An example of an AI chatbot conversation about wildcard usage in various systems.
What are wildcards and how are they used in different systems?
Wildcards are special characters used to represent one or more other characters in search queries or commands. They are commonly used in programming, databases, and file systems.
Can you give me examples of wildcards in SQL?
In SQL, the '%' wildcard represents zero or more characters, while '_' represents a single character. For example, 'A%' matches any string starting with 'A'.
How about in file systems?
In file systems, '' is used to represent any number of characters, while '?' represents a single character. For instance, '.txt' matches all text files.
Are there any wildcards in programming languages?
Yes, many programming languages use wildcards in pattern matching. For example, in Python, the 'fnmatch' module allows the use of '*' and '?' for matching file names.
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