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Show constraints on tables command
...rivileges. If you need simple list of keys you can use this command:
SHOW INDEXES IN <tablename>
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How do I convert CamelCase into human-readable names in Java?
... the String.format(String format, args...) arguments. You can also call by index: String.format("%$1s|%$2s|%$3s", ...
– Mr. Polywhirl
Jan 21 '15 at 3:05
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Create a .csv file with values from a Python list
...ame(data={"col1": list_1, "col2": list_2})
df.to_csv("./file.csv", sep=',',index=False)
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How to export and import a .sql file from command line with options? [duplicate]
...riggers --routines | sed -e 's/DEFINER[ ]*=[ ]*[^*]*\*/\*/ ' | awk '{ if (index($0,"GTID_PURGED")) { getline; while (length($0) > 0) { getline; } } else { print $0 } }' | grep -iv 'set @@' | trickle -u 10240 mysql -u username -p -h localhost DATA-BASE-NAME
some issues/tips:
Error: ......not ...
How to find the sum of an array of numbers
...do know that this magic with reduce() is still 25-30% slower than a simple indexed for() loop after long years? jsperf.com/reduce-vs-loop/4
– tevemadar
Oct 29 '19 at 10:54
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Reusable library to get human readable version of file size?
...ps, using log2 to determine the size order which doubles as a shift and an index into the suffix list:
from math import log2
_suffixes = ['bytes', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB']
def file_size(size):
# determine binary order in steps of size 10
# (coerce to int, /...
Difference between null and empty (“”) Java String
...efined on the empty string - you can convert it to lower case, look up the index of some character in it, etc. The null string null is "no string at all." It doesn't have a length because it's not a string at all. Trying to apply any standard string operation to the null string will cause a NullP...
How do I get the color from a hexadecimal color code using .NET?
..., g, and b. Don't forget to replace the first parameter of Substring - the index - with 2 for r, 4 for g and 6 for b.
– M. Mimpen
Dec 24 '13 at 11:29
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Tools for Generating Mock Data? [closed]
...and supports multiple databases...
http://www.datanamic.com/datagenerator/index.html
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answered Feb 14 '13 at 13:58
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How to use count and group by at the same select statement
... | 0 |
| Handler_write | 14 | -- leapfrog through index to find provinces
+----------------------------+-------+
In the OP's context:
SELECT town, total_users
FROM ( SELECT DISTINCT town FROM canada ) AS towns
CROSS JOIN ( SELECT COUNT(*) total_users ...