What are wildcards in SQL and how do I use them?
An example of an AI chatbot conversation about wildcards in SQL queries.
What are wildcards in SQL and how do I use them?
Wildcards in SQL are special characters used to represent one or more characters in a string. They are often used in the WHERE clause to filter records.
Can you give me an example of using wildcards in a SQL query?
Sure! For instance, if you want to find all names that start with 'A', you can use: SELECT * FROM users WHERE name LIKE 'A%'.
What does the '%' symbol represent in that query?
The '%' symbol represents zero or more characters. So 'A%' matches any string that starts with 'A'.
Are there other wildcard characters I should know about?
Yes, another common wildcard is the underscore '' which represents a single character. For example, 'A' would match 'Al', 'An', etc.
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