1、一種方法是可以設定表或行的collation，使其為binary或case sensitive。在mysql中，對於column collate其約定的命名方法如下：
*_bin: 表示的是binary case sensitive collation，也就是說是區分大小寫的
*_cs: case sensitive collation，區分大小寫
*_ci: case insensitive collation，不區分大小寫
mysql> create table case_bin_test (word varchar(10)) character set latin1 collate latin1_bin;
query ok, 0 rows affected (0.02 sec)
mysql> insert into case_bin_test values ('frank'),('google'),('froogle'),('flickr'),('flickr');
query ok, 5 rows affected (0.00 sec)
records: 5 duplicates: 0 warnings: 0
mysql> select * from case_bin_test where word like 'f%';
+---------+
| word |
+---------+
| froogle |
| flickr |
+---------+
2 rows in set (0.00 sec)
mysql> select * from case_bin_test where word like 'f%';
+---------+
| word |
+---------+
| frank |
| flickr |
+---------+
4 rows in set (0.00 sec)
mysql> create table case_cs_test (word varchar(10)) character set latin1 collate latin1_general_cs;
query ok, 0 rows affected (0.08 sec)
mysql> insert into case_cs_test values ('frank'),('google'),('froogle'),('flickr'),('flickr');
query ok, 5 rows affected (0.00 sec)
records: 5 duplicates: 0 warnings: 0
mysql> select * from case_cs_test where word like 'f%';
+---------+
| word |
+---------+
| frank |
| flickr |
+---------+
4 rows in set (0.00 sec)
mysql> select * from case_cs_test where word like 'f%';
+---------+
| word |
+---------+
| froogle |
| flickr |
+---------+
2 rows in set (0.00 sec)
mysql> create table case_test (word varchar(10)) character set latin1;
query ok, 0 rows affected (0.01 sec)
mysql> insert into case_test values ('frank'),('google'),('froogle'),('flickr'),('flickr');
query ok, 7 rows affected (0.01 sec)
records: 7 duplicates: 0 warnings: 0
mysql> select * from case_test where word like 'f%';
+---------+
| word |
+---------+
| frank |
| froogle |
| flickr |
| flickr |
+---------+
6 rows in set (0.01 sec)
mysql> select * from case_test where word like 'f%';
+---------+
| word |
+---------+
| frank |
| froogle |
| flickr |
| flickr |
+---------+
6 rows in set (0.01 sec)
mysql> select * from case_test where word collate latin1_bin like 'f%';
+---------+
| word |
+---------+
| frank |
| flickr |
+---------+
4 rows in set (0.05 sec)
mysql> select * from case_test where word collate latin1_bin like 'f%';
+---------+
| word |
+---------+
| froogle |
| flickr |
+---------+
2 rows in set (0.00 sec)
mysql> select * from case_test where word like 'f%' collate latin1_bin;
+---------+
| word |
+---------+
| froogle |
| flickr |
+---------+
2 rows in set (0.00 sec)
mysql> select * from case_test where word like 'f%' collate latin1_bin;
+---------+
| word |
+---------+
| frank |
| flickr |
+---------+
4 rows in set (0.01 sec)
mysql> select * from case_test where word like 'f%' collate latin1_general_cs;
+---------+
| word |
+---------+
| frank |
| flickr |
+---------+
4 rows in set (0.04 sec)
select * from table_name where binary a like 'a%'
select * from table_name where binary a like 'a%'
create table table_name(
a varchar (20) binary
)
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