表记录：
|
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8
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13
14
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(root@localhost) [
test
]>
select
* from t;
+----+------+
|
id
| name |
+----+------+
| 1 | a |
| 2 | A |
| 3 | A |
| 4 | B |
| 5 | b |
| 6 | c |
| 7 | d |
| 8 | e |
+----+------+
8 rows
in
set
(0.00 sec)
|
现在查询name=a记录，并忽略大小写
|
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8
9
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(root@localhost) [
test
]>
select
name collate utf8_general_ci from t where name like
'a%'
;
+------------------------------+
| name collate utf8_general_ci |
+------------------------------+
| a |
| A |
| A |
+------------------------------+
3 rows
in
set
(0.00 sec)
|
统计name字段相同记录有多少条
|
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11
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(root@localhost) [
test
]>
select
name,count(*) from t group by name collate utf8_general_ci DESC;
+------+----------+
| name | count(*) |
+------+----------+
| e | 1 |
| d | 1 |
| c | 1 |
| B | 2 |
| a | 3 |
+------+----------+
5 rows
in
set
(0.00 sec)
|
|
1
|
<br data-filtered=
"filtered"
>
|
本文转自hcymysql51CTO博客，原文链接：http://blog.51cto.com/hcymysql/1742836
，如需转载请自行联系原作者
