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How to find gaps in sequential numbering in mysql?
...t on 100 rows):
SELECT (t1.id + 1) as gap_starts_at,
(SELECT MIN(t3.id) -1 FROM arrc_vouchers t3 WHERE t3.id > t1.id) as gap_ends_at
FROM arrc_vouchers t1
WHERE NOT EXISTS (SELECT t2.id FROM arrc_vouchers t2 WHERE t2.id = t1.id + 1)
HAVING gap_ends_at IS NOT NULL
gap_starts_at - first...
Make elasticsearch only return certain fields?
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edited Apr 23 '19 at 0:18
xeraa
8,90933 gold badges2727 silver badges6161 bronze badges
an...
Python argparse ignore unrecognised arguments
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3 Answers
3
Active
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how to mysqldump remote db from local machine
... it at serverfault yet, and the answer is quite simple:
Change:
ssh -f -L3310:remote.server:3306 user@remote.server -N
To:
ssh -f -L3310:localhost:3306 user@remote.server -N
And change:
mysqldump -P 3310 -h localhost -u mysql_user -p database_name table_name
To:
mysqldump -P 3310 -h 127....
Finding the index of elements based on a condition using python list comprehension
... of a list.
>>> import numpy
>>> a = numpy.array([1, 2, 3, 1, 2, 3])
>>> a
array([1, 2, 3, 1, 2, 3])
>>> numpy.where(a > 2)
(array([2, 5]),)
>>> a > 2
array([False, False, True, False, False, True], dtype=bool)
>>> a[numpy.where(a > 2...
How do I call the default deserializer from a custom deserializer in Jackson
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93
+200
As StaxM...
Is it possible to create static classes in PHP (like in C#)?
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edited Nov 23 '16 at 23:23
James Jones
3,57455 gold badges2020 silver badges4141 bronze badges
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get and set in TypeScript
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TypeScript uses getter/setter syntax that is like ActionScript3.
class foo {
private _bar: boolean = false;
get bar(): boolean {
return this._bar;
}
set bar(value: boolean) {
this._bar = value;
}
}
That will produce this JavaScript, using the ECM...
Counting DISTINCT over multiple columns
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answered Sep 26 '09 at 3:42
Jason HornerJason Horner
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Can I create a named default constraint in an add column statement in SQL Server?
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230
This should work:
ALTER TABLE t_tableName
ADD newColumn VARCHAR(50)
CONSTRAINT YourCo...