like
Perform fuzzy matching on the string str, return true if it matches, and false if it doesn’t match.
the percent sign (‘%’) represents zero, one, or more characters.
// table test
+-------+
| k1 |
+-------+
| b |
| bab |
| a |
// Return the data containing a in the k1 string
mysql> select k1 from test where k1 like '%a%';
+-------+
| k1 |
+-------+
| bab |
// Return the data equal to a in the k1 string
mysql> select k1 from test where k1 like 'a';
+-------+
| k1 |
+-------+
| a |
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