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How to change the foreign key referential action? (behavior)
...ocess:
Suppose, a table1 has a foreign key with column name fk_table2_id, with constraint name fk_name and table2 is referred table with key t2 (something like below in my diagram).
table1 [ fk_table2_id ] --> table2 [t2]
First step, DROP old CONSTRAINT: (reference)
ALTER TABLE ...
PostgreSQL - Rename database
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answered Sep 27 '08 at 15:03
bmdhacksbmdhacks
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Express res.sendfile throwing forbidden error
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288
I believe it's because of the relative path; the "../" is considered malicious. Resolve the lo...
Is calculating an MD5 hash less CPU intensive than SHA family functions?
Is calculating an MD5 hash less CPU intensive than SHA-1 or SHA-2 on "standard" laptop x86 hardware? I'm interested in general information, not specific to a certain chip.
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Pandas aggregate count distinct
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How about either of:
>>> df
date duration user_id
0 2013-04-01 30 0001
1 2013-04-01 15 0001
2 2013-04-01 20 0002
3 2013-04-02 15 0002
4 2013-04-02 30 0002
>>> df.groupby("date").agg({"duration": np.sum, "user_id": ...
How can I use Bash syntax in Makefile targets?
...ul, e.g. process substitution like in diff <(sort file1) <(sort file2) .
6 Answers
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Using R to list all files with a specified extension
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205
files <- list.files(pattern = "\\.dbf$")
$ at the end means that this is end of string. "...
Sharing src/test classes between modules in a multi-module maven project
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2 Answers
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