The difference between like,%, - in database query SQL

% The percent character : Means any character appears any number of times ( It can be 0 Time )

SQL  Sentence selection  name  In letters  "k"  All customers at the end ：
 

SELECT * FROM Websites WHERE name LIKE '%k';

Execute output result ：



Underline wildcards : Indicates that only a single character can be matched , No more, no less , It's just a character .

Query employee name to employee 1 start , People with only one character after them
 

select * from #tmpEmployee where EmpName like ' staff 1_'

like The operator : LIKE The function is to indicate mysql The latter search pattern is to use wildcards instead of direct equal matching for comparison .

SQL  Sentence selection  name  In letters  "G"  All the customers who started ：
 

SELECT * FROM Websites WHERE name LIKE 'G%';

  Execute output result ：