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docker mounting volumes on host
...ontainer.
Example:
You have a Dockerfile that defines a VOLUME /var/lib/mysql.
You build the docker image and tag it some-volume
You run the container
And then,
You have another docker image that you want to use this volume
You run the docker container with the following:
docker run --volumes...
MySQL和MongoDB设计实例进行对比 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...本信息，还包含了待机时间，外观设计等参数信息，应该如何存取数据呢？
如果使用MySQL的话，应该如何存取数据呢？
如果使用MySQL话，手机的基本信息单独是一个表，另外由于不同手机的参数信息差异很大，所以还需要一个...
IOS 设备忘记root密码怎么找回 - 更多技术 - 清泛网 - 专注C/C++及内核技术
IOS 设备忘记root密码怎么找回上次我拿iPhone准备登陆终端进行操作的时候发现我的root密码被修改过，但是很久没有登陆过了。于是自己改成什么密码都忘记了。最开始准备重...上次我拿iPhone准备登陆终端进行操作的时候发现我的...
Get top n records for each group of grouped results
...ould need to specify the group number and add queries for each group:
(
select *
from mytable
where `group` = 1
order by age desc
LIMIT 2
)
UNION ALL
(
select *
from mytable
where `group` = 2
order by age desc
LIMIT 2
)
There are a variety of ways to do this, see this articl...
'IF' in 'SELECT' statement - choose output value based on column values
...
SELECT id,
IF(type = 'P', amount, amount * -1) as amount
FROM report
See http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html.
Additionally, you could handle when the condition is null. In the case of...
1052: Column 'id' in field list is ambiguous
...and tbl_section which has both the id field in them. How do I go about selecting the id field, because I always get this error:
...
程序员之网络安全系列（四）：数据加密之非对称秘钥 - 更多技术 - 清泛网 -...
...相互不认识，明明想给丽丽写一封情书，让隔壁老王送去如何保证隔壁老王不能看到情书内容？（保密性)如何保证隔壁...前文回顾
假如，明明和丽丽相互不认识，明明想给丽丽写一封情书，让隔壁老王送去
如何保证隔壁老...
How do I get SUM function in MySQL to return '0' if no values are found?
...
Use COALESCE to avoid that outcome.
SELECT COALESCE(SUM(column),0)
FROM table
WHERE ...
To see it in action, please see this sql fiddle: http://www.sqlfiddle.com/#!2/d1542/3/0
More Information:
Given three tables (one with all numbers, one with all nul...
SQL Server CTE and recursion example
...The query finds all root nodes as described by WHERE ManagerID IS NULL
SELECT EmployeeID, FirstName, LastName, ManagerID, 1
FROM Employees
WHERE ManagerID IS NULL
-->>>>>>>>>>Block 1>>>>>>>>>>>>>>>>>
UNI...
Multiple Updates in MySQL
... another useful option is not yet mentioned:
UPDATE my_table m
JOIN (
SELECT 1 as id, 10 as _col1, 20 as _col2
UNION ALL
SELECT 2, 5, 10
UNION ALL
SELECT 3, 15, 30
) vals ON m.id = vals.id
SET col1 = _col1, col2 = _col2;
...