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How do I calculate tables size in Oracle
... WHERE segment_type IN ('TABLE', 'TABLE PARTITION', 'TABLE SUBPARTITION')
UNION ALL
SELECT i.table_name, i.owner, s.bytes
FROM dba_indexes i, dba_segments s
WHERE s.segment_name = i.index_name
AND s.owner = i.owner
AND s.segment_type IN ('INDEX', 'INDEX PARTITION', 'INDEX SUBPARTITION')
U...
A better similarity ranking algorithm for variable length strings
...tr2.length-2).collect {|i| str2[i,2]}.reject {
|pair| pair.include? " "}
union = pairs1.size + pairs2.size
intersection = 0
pairs1.each do |p1|
0.upto(pairs2.size-1) do |i|
if p1 == pairs2[i]
intersection += 1
pairs2.slice!(i)
break
end
end
end
(2.0 * inter...
Hidden Features of MySQL
...QL Server with many years now but have only just recently started to use MySQL with my web applications, and I'm hungry for knowledge.
...
What are the use cases for selecting CHAR over VARCHAR in SQL?
...rchar, it's free to use 1-3 bytes per character as needed. This is in the MySQL manual: dev.mysql.com/doc/refman/5.0/en/charset-unicode-utf8.html
– Gavin Towey
Mar 27 '14 at 2:14
...
编程基础与事件状态 04：用状态机处理暂停和重复点击 · App Inventor 2 中文网
...明状态变量；开始入口只允许待开始或完成，防止运行中重置截止。
运行且尚未到期时，暂停保存剩余并关 Timer；到期边缘让 Timer 完成，不进入剩余为零的暂停死状态。
暂停且剩余>0 时允许继续，重新计算截止，重新启用...
LISTAGG in Oracle to return distinct values
...ta as
(
select 'A' as col1, 'T_a1' as col2, '123' as col3 from dual
union select 'A', 'T_a1', '456' from dual
union select 'A', 'T_a1', '789' from dual
union select 'A', 'T_a2', '123' from dual
union select 'A', 'T_a2', '456' from dual
union select 'A', 'T_a2', '111' from dual
union select 'A...
TaifunWiFi 拓展：WiFi Manager WiFi管理器扩展 · App Inventor 2 中文网
...回当前设备的Android API级别。
ConnectSSID 连接网络(SSID,密码)
连接到指定的SSID（服务集标识符）。适用于Android >= 10。
使用新的点对点API来引导配置辅助设备，该API从Android 10开始可用。此API需要WRITE_SETTINGS权限。
DisconnectSSID...
MLKitCodeScanner 拓展：离线条码 / 二维码识别 · App Inventor 2 中文网
... 二、摄像头实时扫描
三、扫 WiFi 二维码并显示密码
四、只扫二维码（提速）
五、扫码开灯（暗环境）
属性
事件
方法
运行环境：AI 伴侣联机需要 Android 11 及以上
常...
sql query to return differences between two tables
...
( SELECT * FROM table1
EXCEPT
SELECT * FROM table2)
UNION ALL
( SELECT * FROM table2
EXCEPT
SELECT * FROM table1)
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你真的了解熊市有多么可怕吗？ - 创意 - 清泛网 - 专注C/C++及内核技术
...情，因为天天都是跌。
每天出现的股评高手，说的都是如何杀跌换股，短线操作而不是持有。
每隔几周，都会出现新底，而且每次有人叫着抄底，接下来就继续地下跌，跌到最后没人说抄底为止。国家出台超过3个以上的利好...