not like

Description

Syntax:

BOOLEAN not like(VARCHAR str, VARCHAR pattern)

This function performs fuzzy matching on the string str. If the string matches the condition, it will return false; if it doesn't, it will return true.

The not_like match/fuzzy match will be used in combination with % and _.

% represents zero, one, or more characters.

_ represents a single character.

'a'   // Precise matching, has the same effect as "="
'%a'  // data ending with "a"
'a%'  // data starting with "a"
'%a%' // data containing "a"
'_a_' // three-digit data with "a" as the middle character
'_a'  // two-digit data with "a" as the last character
'a_'  // two-digit data with "a" as the first character
'a__b'  // four-digit data with "a" as the first character and "b" as the last character

Example

// table test
+-------+
| k1    |
+-------+
| b     |
| bb    |
| bab   |
| a     |
+-------+

// Return data that does not contain "a" in the k1 string
mysql> select k1 from test where k1 not like '%a%';
+-------+
| k1    |
+-------+
| b     |
| bb    |
+-------+

// Return the data that is not equal to "a" in the k1 string
mysql> select k1 from test where k1 not like 'a';
+-------+
| k1    |
+-------+
| b     |
| bb    |
| bab   |
+-------+

Keywords

LIKE, NOT, NOT LIKE

like mask