大约有 48,000 项符合查询结果（耗时：0.0316秒） [XML]
“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
...int, unique key (u));
mysql> insert into foo (u) values (10);
mysql> select * from foo;
+----+------+
| id | u |
+----+------+
| 1 | 10 |
+----+------+
mysql> show create table foo\G
CREATE TABLE `foo` (
`id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
`u` int(11) DEFAULT NULL,
...
How to debug Google Apps Script (aka where does Logger.log log to?)
...All I did was make sure the cell that I wanted it to treat as "edited" was selected, then in Script Editor, I would go to Run->onEdit. Then my breakpoint would be hit.
However, I did have to stop using the event argument that gets passed into the onEdit function - you can't simulate that by doin...
Oracle nvarchar和varchar相互转换、联合查询 - 数据库(内核) - 清泛网 - ...
...tatype isNVARCHAR2.
（A表字段c_xxx:varchar，B表c_xxx:nvarchar）
select translate(c_xxx USING NCHAR_CS) from A
union all
select c_xxx from B
或者
select c_xxx from A
union all
select translate(c_xxx USING CHAR_CS) from B
注意：translate函数括号中没有逗号。
1、...
Oracle 分组后取每组第一条数据 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...据Oracle 分组后取每组第一条数据的SQL如下，亲测有效：SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY T field1, T Oracle 分组后取每组第一条数据的SQL如下，亲测有效：
SELECT *
FROM (SELECT ROW_NUMBER() OVER(PARTITION BY T.field1, T.field2 ORDER...
nvarchar和varchar相互转换、联合查询 - ORACLE - 清泛IT论坛，有思想、有深度
...atype is NVARCHAR2.
（A表字段c_xxx:varchar，B表c_xxx:nvarchar）
select translate(c_xxx USING NCHAR_CS) from A
union all
select c_xxx from B
或者
select c_xxx from A
union all
select translate(c_xxx USING CHAR_CS) from B
注意：translate函数括号中没有逗号。
1、...
Why does String.valueOf(null) throw a NullPointerException?
...s
How does polymorph ambiguity distinction work?
Which overload will get selected for null in Java?
Moral of the story
There are several important ones:
Effective Java 2nd Edition, Item 41: Use overloading judiciously
Just because you can overload, doesn't mean you should every time
They ...
Sublime as default editor
... my answer, I have just googled it:
Open regedit (Win+R, type "regedit", select OK).
Navigate to HKEY_CLASSES_ROOT\Applications\sublime_text.exe\shell\open\command
Verify that the path is accurate, correct it if it is not. Exit regedit.
Open task manager via Ctrl+Alt+Del (or Ctrl+Shift+Esc for lat...
完美解决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题 - 更多...
... if(!$_POST['tocatid']) showmessage(L('please_select_target_category'));
$tocatid = intval($_POST['tocatid']);
$modelid = $this->categorys[$tocatid]['modelid'];
if(!$modeli...
CSS: background image on background color
I have panel which I colored blue if this panel is being selected (clicked on it). Additionally, I add a small sign ( .png image) to that panel, which indicates that the selected panel has been already selected before.
...
Spring Data: “delete by” is supported?
...
When you go with query by method (2nd way) it will first do a get call
select * from user where last_name = :firstName
Then it will load it in a List
Then it will call delete id one by one
delete from user where id = 18
delete from user where id = 19
First fetch list of object, then for loo...