大约有 7,000 项符合查询结果（耗时：0.0327秒） [XML]
How to use GROUP BY to concatenate strings in MySQL?
... id, GROUP_CONCAT(name SEPARATOR ' ') FROM table GROUP BY id;
http://dev.mysql.com/doc/refman/5.0/en/group-by-functions.html#function_group-concat
From the link above, GROUP_CONCAT: This function returns a string result with the concatenated non-NULL values from a group. It returns NULL if there ...
Alter a MySQL column to be AUTO_INCREMENT
...ber between parenthesis does exactly nothing (well ok, almost nothing) for MySQL integer types. The only thing that may be influenced by the number is the display width, and it is up to the client to do that. But don't be deceived and think that it works like it does for VARCHAR and DECIMAL types - ...
What does it mean when MySQL is in the state “Sending data”?
What does it mean if the Mysql query:
2 Answers
2
...
MySQL Like multiple values
I have this MySQL query.
9 Answers
9
...
Why is MySQL's default collation latin1_swedish_ci?
...rs? they changed this into a sane default, like utf8_general_ci. Good job, MySQL !
– Michael Trouw
Sep 24 '15 at 10:17
...
MySql Table Insert if not exist otherwise update
... re-written using the proper INSERT ... ON DUPLICATE KEY UPDATE syntax for MySQL:
INSERT INTO AggregatedData (datenum,Timestamp)
VALUES ("734152.979166667","2010-01-14 23:30:00.000")
ON DUPLICATE KEY UPDATE
Timestamp=VALUES(Timestamp)
...
常用快速产品原型设计工具推荐 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...了解用例的用户界面；
系统分析员，用来了解用户界面如何影响系统分析；
设计员，用来了解用户界面如何施加影响及它对系统“内部”的要求；
类测试人员，用来制定测试计划活动。
如何高效完成优秀原型设计，工具自...
App Inventor 2 接入百度网盘API · App Inventor 2 中文网
...框】
接入文档
使用Web浏览框，里面要输入网盘用户名密码，成功后返回的url中拿出access_token
这里使用简单模式，回调网页，在回调后的URL中拿出access_token，后面操作都需要它：
http://openapi.baidu.com/oauth/2.0/authorize?display=mobil...
What is the maximum length of data I can put in a BLOB column in MySQL?
What is the maximum length of data I can put in a BLOB column in MySQL?
3 Answers
3
...
What is the difference between BIT and TINYINT in MySQL?
...o
64. The default is 1 if M is omitted.
This data type was added in MySQL
5.0.3 for MyISAM, and extended in 5.0.5 to MEMORY, InnoDB, BDB, and NDBCLUSTER. Before 5.0.3, BIT is a
synonym for TINYINT(1).
TINYINT[(M)] [UNSIGNED] [ZEROFILL]
A very small integer. The signed range
is -12...