大约有 30,000 项符合查询结果（耗时：0.0629秒） [XML]
Is there a MySQL option/feature to track history of changes to records?
...
For example, if you have a table like this:
CUSTOMER
---------
CUSTOMER_ID PK
CUSTOMER_NAME
CUSTOMER_ADDRESS
and you wanted to keep track over time, you would amend it as follows:
CUSTOMER
------------
CUSTOMER_ID PK
CUSTOMER_VALID_FROM PK
CUSTOMER_VALID_UNTIL PK
CUSTOMER_STAT...
What is a Manifest in Scala and when do you need it?
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
How to find a table having a specific column in postgresql
...
answered Dec 5 '19 at 20:32
romuloMendesromuloMendes
3166 bronze badges
...
How to Pass Parameters to Activator.CreateInstance()
...
answered Aug 7 '18 at 8:32
Anestis KivranoglouAnestis Kivranoglou
5,94044 gold badges3737 silver badges4141 bronze badges
...
arrayfun can be significantly slower than an explicit loop in matlab. Why?
...
angainorangainor
11.5k22 gold badges3232 silver badges5454 bronze badges
9
...
How to stop a JavaScript for loop?
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
How does HashSet compare elements for equality?
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
How do I find a “gap” in running counter with SQL?
...change your TOP value, to show more gap results.
– AJ_
Mar 28 '19 at 13:43
1
Thanks, this works v...
Why are regular expressions so controversial? [closed]
...another example of a modern grammatical pattern, this one for parsing RFC 5322:
use 5.10.0;
$rfc5322 = qr{
(?(DEFINE)
(?<address> (?&mailbox) | (?&group))
(?<mailbox> (?&name_addr) | (?&addr_spec))
(?<name_addr> (?&...
How to trim leading and trailing white spaces of a string?
...
Denys SéguretDenys Séguret
321k6969 gold badges680680 silver badges668668 bronze badges
...