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Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
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Use the date function:
select date(timestamp_field) from table
From a character field representation to a date you can use:
select date(substring('2011/05/26 09:00:00' from 1 for 10));
Test code:
create table test_table (timestamp_field timestamp);
insert into test_table (tim...
How do I drop a function if it already exists?
...'TF')
)
DROP FUNCTION function_name
GO
If you want to avoid the sys* tables, you could instead do (from here in example A):
IF object_id(N'function_name', N'FN') IS NOT NULL
DROP FUNCTION function_name
GO
The main thing to catch is what type of function you are trying to delete (denoted...
How do I convert a pandas Series or index to a Numpy array? [duplicate]
...ke this:
dd = list(zone[0]) #Where zone[0] is some specific column of the table
idx = dd.index(filename[i])
You have you index value as idx.
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Bootstrap 3 Collapse show state with Chevron icon
...Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
</div>
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Set a default parameter value for a JavaScript function
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Here is the compatibility table for ES6 kangax.github.io/compat-table/es6/#default_function_parameters Unfortunately this syntax isn't supported yet.
– freemanoid
Jul 9 '15 at 19:03
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Error installing mysql2: Failed to build gem native extension
...\models\city.rb to look like this
class City < ActiveRecord::Base
set_table_name "city"
end
Edit the file c:\Sites\world\config\database.yml to look like this
development:
adapter: mysql2
encoding: utf8
database: world
pool: 5
username: root
password: root
socket: /tmp/mysql.sock
add to ge...
Rolling or sliding window iterator?
...I changed it to individually look up and add items in a window of ten, the tables turned and the tee method was 20% faster. I was able to recover some speed by using negative indexes for the last five terms in the addition, but tee was still a little faster. Overall I would estimate that either one ...
How to assign from a function which returns more than one value?
...it a lot more now than when I originally posted this answer since the data.table package uses the := operator mucho in a much handier way :-)
– Steve Lianoglou
Mar 12 '13 at 0:58
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How do I drop a foreign key in SQL Server?
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Try
alter table company drop constraint Company_CountryID_FK
alter table company drop column CountryID
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Why does NULL = NULL evaluate to false in SQL server
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@NeilMcGuigan That's true if for data that has its own table, but what about data that's represented in a column? Wouldn't you use 'null' to represent the fact that the data doesn't exist? 'Not known' is a very specific reason for the data being absent.
– Ri...