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Display names of all constraints for a table in Oracle SQL
...CONS_COLUMNS view to see the table columns and corresponding constraints:
SELECT *
FROM user_cons_columns
WHERE table_name = '<your table name>';
FYI, unless you specifically created your table with a lower case name (using double quotes) then the table name will be defaulted to upper ca...
Importing a GitHub project into Eclipse
...ries")
Eclipse with GitHub
EGit tutorial
Copy the URL from GitHub and select in Eclipse from the menu the
File → Import → Git → Projects from Git
If the Git repo isn't cloned yet:
In> order to checkout a remote project, you will have to clone its repository first.
Open the E...
Checking oracle sid and database name
...
I presume SELECT user FROM dual; should give you the current user
and SELECT sys_context('userenv','instance_name') FROM dual; the name of the instance
I believe you can get SID as SELECT sys_context('USERENV', 'SID') FROM DUAL;
...
How to get first and last day of previous month (with timestamp) in SQL Server
...
select DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-1, 0) --First day of previous month
select DATEADD(MONTH, DATEDIFF(MONTH, -1, GETDATE())-1, -1) --Last Day of previous month
...
ORDER BY the IN value list
... (introduced in PostgreSQL 8.2) VALUES (), ().
Syntax will be like this:
select c.*
from comments c
join (
values
(1,1),
(3,2),
(2,3),
(4,4)
) as x (id, ordering) on c.id = x.id
order by x.ordering
share...
CROSS JOIN vs INNER JOIN in SQL
...ame situation.
These 2 examples will return the same result:
Cross join
select * from table1 cross join table2 where table1.id = table2.fk_id
Inner join
select * from table1 join table2 on table1.id = table2.fk_id
Use the last method
...
正确重置MySQL密码 - 爬虫/数据库 - 清泛IT社区，为创新赋能！
谁都不想弄丢家门钥匙，但不管多么小心，时间长了，这样的事情总会发生几次。MySQL密码也是一样，把它写在文档上不太安全，记在脑子里又难免会忘记。如果你忘记了MySQL密码，如何重置它呢？
下面是错误答案：首先停止MyS...
解决IIS发布时global_asax的dll 的CS0433冲突问题 - 环境配置 - 清泛IT社区，为创新赋能！
Server Error in '/' Application.Compilation ErrorDescription: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.
Compiler Error Message: CS0433: The type 'ASP.globa...
自定义下载器扩展：个性化下载进度展示 - App Inventor 2 拓展 - 清泛IT社...
Customdownloader Extension
Documentation
Event triggered when an error occurs during download.
Successful Download downloadId, filePath, fileSize, fileName
Event triggered to report download progress, speed, eta, fileSize, and downloadedSize
Download the file of given URL to t...
mobile location - App应用开发 - 清泛IT社区，为创新赋能！
通过android studio实现: 在屏幕上输入手机号码，点击确定开始查找，用gps数据确定手机的当前精确位置，精确度5米，找到后把经纬度写在两个文字框里，并在百度地图上标注出位置,并移动到屏幕中央，放大地图。
Imple...