大约有 47,000 项符合查询结果（耗时：0.0702秒） [XML]
How to see indexes for a database or table in MySQL?
...fic table use SHOW INDEX:
SHOW INDEX FROM yourtable;
To see indexes for all tables within a specific schema you can use the STATISTICS table from INFORMATION_SCHEMA:
SELECT DISTINCT
TABLE_NAME,
INDEX_NAME
FROM INFORMATION_SCHEMA.STATISTICS
WHERE TABLE_SCHEMA = 'your_schema';
Removing ...
Detect and exclude outliers in Pandas data frame
...
If you have multiple columns in your dataframe and would like to remove all rows that have outliers in at least one column, the following expression would do that in one shot.
df = pd.DataFrame(np.random.randn(100, 3))
from scipy import stats
df[(np.abs(stats.zscore(df)) < 3).all(axis=1)]
...
List all developers on a project in Git
Is it possible to list all users that contributed to a project (users that have done commits) in Git?
9 Answers
...
Sublime - delete all lines containing specific value
.../or not connected.*\n
Leave the Replace With field empty.
Click Replace All
share
|
improve this answer
|
follow
|
...
What are enums and why are they useful?
...
You should always use enums when a variable (especially a method parameter) can only take one out of a small set of possible values. Examples would be things like type constants (contract status: "permanent", "temp", "apprentice"), or flags ("execute now", "defer execution")....
Is there a combination of “LIKE” and “IN” in SQL?
... volume this could be quite long.
– Pierre-Gilles Levallois
Aug 21 '12 at 13:49
20
With SQL Serve...
How can I find all of the distinct file extensions in a folder hierarchy?
...inux machine I would like to traverse a folder hierarchy and get a list of all of the distinct file extensions within it.
1...
lose vim colorscheme in tmux mode
...
Personally I had to use set -g default-terminal "screen-256color" to work rather than xterm on OS X, sshed into an Ubuntu box. I referred to this site: rhnh.net/2011/08/20/vim-and-tmux-on-osx
– waffl
...
What is a monad?
...ld be a brief, succinct, practical explanation as to what a monad essentially is?
46 Answers
...
T-SQL: Deleting all duplicate rows but keeping one [duplicate]
I have a table with a very large amount of rows. Duplicates are not allowed but due to a problem with how the rows were created I know there are some duplicates in this table.
I need to eliminate the extra rows from the perspective of the key columns. Some other columns may have slightly different...