大约有 19,000 项符合查询结果（耗时：0.0270秒） [XML]
廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...lic/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
a9:8a:3a:3d:64:eb:0b:de:94:a5:92:e4:ba:5d:f3:de root@gfs_1
The key's rand...
What is the difference between a stored procedure and a view?
...nd why to use each.
Say I have two tables:
tbl_user, with columns: user_id, user_name, user_pw
tbl_profile, with columns: profile_id, user_id, profile_description
So, if I find myself querying from those tables A LOT... instead of doing the join in EVERY piece of SQL, I would define a view like...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...admin数据库
use admin
#定义副本集配置变量，这里的 _id:”repset” 和上面命令参数“ –replSet repset” 要保持一样。
config = { _id:"repset", members:[
{_id:0,host:"192.168.1.136:27017"},
{_id:1,host:"192.168.1.137:27017"},
{_id:2,host:...
Why can't Python parse this JSON data?
...
Your data is not valid JSON format. You have [] when you should have {}:
[] are for JSON arrays, which are called list in Python
{} are for JSON objects, which are called dict in Python
Here's how your JSON file should look:
{
"maps": [...
In Markdown, what is the best way to link to a fragment of a page, i.e. #some_id?
...v> -- this will mess up the layout for many renderers.
(I have changed id= to name= above. See this answer for the tedious explanation.)
share
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improve this answer
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fol...
Where can I find my Facebook application id and secret key?
In my Facebook account, where can I find these application IDs, secret key, all?
7 Answers
...
Inner join vs Where
...he same execution plan, look at these two tables:
CREATE TABLE table1 (
id INT,
name VARCHAR(20)
);
CREATE TABLE table2 (
id INT,
name VARCHAR(20)
);
The execution plan for the query using the inner join:
-- with inner join
EXPLAIN PLAN FOR
SELECT * FROM table1 t1
INNER JOIN table2 t2 ...
常用Git命令汇总 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...变）
git reset <file> #从暂存区恢复到工作区（不指定版本id，则默认为最后一次提交的版本id）
git reset . #从暂存区恢复到工作区
git reset $id # 恢复到指定的提交版本，该$id之后的版本提交都恢复到工作区
git reset --hard $id #恢复...
Is it possible to change the textcolor on an Android SearchView?
...
Add
<item name="android:editTextColor">@android:color/white</item>
to the parent theme and that should change the entered text. You can also use
<item name="android:textColorHint">@android:color/white</item>
to change th...
org.hibernate.MappingException: Could not determine type for: java.util.List, at table: College, for
...
You are using field access strategy (determined by @Id annotation). Put any JPA related annotation right above each field instead of getter property
@OneToMany(targetEntity=Student.class, mappedBy="college", fetch=FetchType.EAGER)
private List<Student> students;
...