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What does like in sql mean?

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Release: 2024-05-01 23:30:59
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The LIKE operator in SQL is used to find values ​​that match a specific pattern. It uses the wildcard characters % (matches any character) and _ (matches a single character). The LIKE operator is usually used in conjunction with the WHERE clause to filter rows in a table. Note that it is case-sensitive and wildcards can only be used at the beginning or end of the pattern.

What does like in sql mean?

#What is LIKE in SQL?

The LIKE operator is used in SQL to find values ​​that match a specific pattern. It uses the wildcard characters % (percent sign) and _ (underscore), allowing you to specify a specific part of the value to search for.

The percent sign (%)

The percent sign matches any number of characters. For example, LIKE '%john%' will match the values ​​john, john smith, johnny, etc.

Underscore (_)

Underscore matches a single character. For example, LIKE 'j_hn' will match john, but not johnny.

Use the LIKE operator

The LIKE operator is usually used in combination with the WHERE clause to filter the table OK. The syntax is as follows:

<code>SELECT column_name(s)
FROM table_name
WHERE column_name LIKE 'pattern';</code>
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Example

Look up all customers whose name contains "john" in table customers:

<code>SELECT name
FROM customers
WHERE name LIKE '%john%';</code>
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Notes

  • #The LIKE operator is case-sensitive. The
  • % and _ wildcard characters can only be used at the end or beginning of the pattern.
  • If you need to find % or _ characters in a pattern, use the escape character \ (backslash). For example, LIKE '\\%john' will match %john.

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