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Finding duplicate rows in SQL Server
...answer that worked just great: Get list of duplicate rows in MySql
SELECT n1.*
FROM myTable n1
INNER JOIN myTable n2
ON n2.repeatedCol = n1.repeatedCol
WHERE n1.id <> n2.id
share
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improve...
What is the Linux equivalent to DOS pause?
...
read does this:
user@host:~$ read -n1 -r -p "Press any key to continue..." key
[...]
user@host:~$
The -n1 specifies that it only waits for a single character. The -r puts it into raw mode, which is necessary because otherwise, if you press something like ba...
CDN（内容分发网络）技术原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 202.96.128.68
cache IN A 202.93.22.13 ;有多少个CACHE地址
cache IN A 210.21.30.90 ;就有多少个CACHE的A记录
cache IN A 211.99.13.47
2) /etc/named.conf中的内容为：
options {
directory "/var...
How to compare two floating point numbers in Bash?
...ematics. You can use this bash utility function:
numCompare() {
awk -v n1="$1" -v n2="$2" 'BEGIN {printf "%s " (n1<n2?"<":">=") " %s\n", n1, n2}'
}
And call it as:
numCompare 5.65 3.14e-22
5.65 >= 3.14e-22
numCompare 5.65e-23 3.14e-22
5.65e-23 < 3.14e-22
numCompare 3.145678 3...
世界上最经典的25句话 [转] - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...你
13、死亡教会人一切，如同考试之后公布的结果——虽然恍然大悟，但为时晚矣
14、你出生的时候，你哭着，周围的人笑着；你逝去的时候，你笑着，而周围的人在哭！一...
日期计算器与倒数日：日期选择框取前一天、日期加减、相差天数（附 .aia 源...
...天 07:30 还有 10 小时 0 分钟
倒数日
期末考试 · 还有 100 天；过零点自动刷新，点一条可删除
核心代码
日期选择框选完后，所选日期在 Instant 属性里，是一个「时刻」，配合计时器的日...
How to find the nearest parent of a Git branch?
..." \
| grep "\*" \
| grep -v "$(git rev-parse --abbrev-ref HEAD)" \
| head -n1 \
| sed "s/^.*\[//"
With awk:
git show-branch -a \
| grep '\*' \
| grep -v `git rev-parse --abbrev-ref HEAD` \
| head -n1 \
| sed 's/[^\[]*//' \
| awk 'match($0, /\[[a-zA-Z0-9\/-]+\]/) { print substr( $0, RSTART+1, RLE...
Using a 'using alias = class' with generic types? [duplicate]
...laration without supplying type arguments.
namespace N2
{
using W = N1.A; // Error, cannot name unbound generic type
using X = N1.A.B; // Error, cannot name unbound generic type
using Y = N1.A<int>; // Ok, can name closed constructed type
using Z<T> = ...
Assigning variables with dynamic names in Java
...ough quick and dirty example is this:
public class T {
public Integer n1;
public Integer n2;
public Integer n3;
public void accessAttributes() throws IllegalArgumentException, SecurityException, IllegalAccessException,
NoSuchFieldException {
for (int i = 1; i &...
What's the best way to get the last element of an array without deleting it?
...rray_slice($array, -1))[0]; || W1 + W2 | N1 | - | - | - | - | - || W1 + W2 | N1 | - | - | - | - | - || W1 + W2 | ...