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What is the best place for storing uploaded images, SQL database or disk file system? [closed]
...
I have recently created a PHP/MySQL app which stores PDFs/Word files in a MySQL table (as big as 40MB per file so far).
Pros:
Uploaded files are replicated to backup server along with everything else, no separate backup strategy is needed (peace of min...
Check for changes to an SQL Server table?
...T CHECKSUM_AGG(BINARY_CHECKSUM(*)) FROM
(
SELECT 1 as numA, 1 as numB
UNION ALL
SELECT 1 as numA, 1 as numB
) q
-- delivers 0!
SELECT CHECKSUM_AGG(BINARY_CHECKSUM(*)) FROM
(
SELECT 1 as numA, 2 as numB
UNION ALL
SELECT 1 as numA, 2 as numB
) q
-- delivers 0!
SELECT CHECKSUM_AGG(BIN...
How to send an email with Python?
...se user:
If you use 126/163, 网易邮箱, you need to set"客户端授权密码", like below:
ref: https://stackoverflow.com/a/41470149/2803344
https://docs.python.org/3/library/email.examples.html#email-examples
share
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How to read multiple text files into a single RDD?
...Dirs,320) it leads to 19430 total tasks instead of 320 ... it behaves like union which also leads to insane number of tasks from very low parallelism
– lisak
Nov 25 '15 at 10:51
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What columns generally make good indexes?
...er to use index */
Since "buyer_id" is referenced in the SELECT portion, MySQL will not use it to limit the chosen rows. Hence, there is no great need to index it. The below is another example little different from the above one:
SELECT
buyers.buyer_id, /* no need to index */
country.name /*...
How can I add reflection to a C++ application?
...ble with C++.
Inspection by checking whether a class-type (class, struct, union) has a method or nested type, is derived from another particular type.
This kind of thing is possible with C++ using template-tricks. Use boost::type_traits for many things (like checking whether a type is integral). Fo...
WinImage 映像读写工具 - 软件下载 - 清泛网 - 专注IT技能提升
...动器中的内容，支持转换虚拟硬盘映像，可将物理驱动器重置为可引导，可读取并写入磁盘。
8.50WinXP,Win7,Win8,Win10712K
WinImage 映像读写工具 - 软件下载 - 清泛网 - 专注IT技能提升
...动器中的内容，支持转换虚拟硬盘映像，可将物理驱动器重置为可引导，可读取并写入磁盘。
8.50WinXP,Win7,Win8,Win10712K
WinImage 映像读写工具 - 软件下载 - 清泛网移动版 - 专注IT技能提升
...动器中的内容，支持转换虚拟硬盘映像，可将物理驱动器重置为可引导，可读取并写入磁盘。
8.50WinXP,Win7,Win8,Win10712K
WinImage 映像读写工具 - 软件下载 - 清泛网移动版 - 专注IT技能提升
...动器中的内容，支持转换虚拟硬盘映像，可将物理驱动器重置为可引导，可读取并写入磁盘。
8.50WinXP,Win7,Win8,Win10712K