May 2020
Beginner
564 pages
14h 9m
English
Content preview from Learn SQL Database Programming
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Learning how to use the LIKE operator and wildcards
You may not be able to match on the entire string in a field. To match on partial values, you can use the LIKE operator with wildcards. A wildcard is put in place of one or more characters in a string. It is used along with the LIKE operator.
When you use wildcards in your WHERE clause, the query may not be using the indexes, depending on how you use the wildcard characters. More information on this will be provided in the Using indexes with your queries section, later in this chapter. It's essential to use as few wildcards as possible in any queries you write.
The following table shows the types of wildcards that are available in MySQL:
| Wildcard character | Character description | How ... |
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