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MySQL Multiple Joins in one query?
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answered Jan 23 '12 at 15:49
Code MagicianCode Magician
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What's Go's equivalent of argv[0]?
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edited Dec 7 '14 at 13:59
rightfold
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answe...
Find the max of two or more columns with pandas
...>>> import pandas as pd
>>> df = pd.DataFrame({"A": [1,2,3], "B": [-2, 8, 1]})
>>> df
A B
0 1 -2
1 2 8
2 3 1
>>> df[["A", "B"]]
A B
0 1 -2
1 2 8
2 3 1
>>> df[["A", "B"]].max(axis=1)
0 1
1 8
2 3
and so:
>>> df["C"] = ...
PostgreSQL: insert from another table
...y literal values in the SELECT:
INSERT INTO TABLE1 (id, col_1, col_2, col_3)
SELECT id, 'data1', 'data2', 'data3'
FROM TABLE2
WHERE col_a = 'something';
A select list can contain any value expression:
But the expressions in the select list do not have to reference any columns in the table exp...
How to invert a grep expression
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344
Use command-line option -v or --invert-match,
ls -R |grep -v -E .*[\.exe]$\|.*[\.html]$
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New line in Sql Query
...age-return-r-t-sql-new-line-char/
DECLARE @NewLineChar AS CHAR(2) = CHAR(13) + CHAR(10)
PRINT ('SELECT FirstLine AS FL ' + @NewLineChar + 'SELECT SecondLine AS SL')
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What does a tilde in angle brackets mean when creating a Java generic class?
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answered Feb 3 '11 at 15:12
openCageopenCage
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