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Repair all tables in one go
...ry to print REPAIR SQL statments for all tables inside a database:
select concat('REPAIR TABLE ', table_name, ';') from information_schema.tables
where table_schema='mydatabase';
After that copy all the queries and execute it on mydatabase.
Note: replace mydatabase with desired DB name
...
How to see indexes for a database or table in MySQL?
...ed database.
SELECT TABLE_NAME,
COUNT(1) index_count,
GROUP_CONCAT(DISTINCT(index_name) SEPARATOR ',\n ') indexes
FROM INFORMATION_SCHEMA.STATISTICS
WHERE TABLE_SCHEMA = 'mydb'
AND INDEX_NAME != 'primary'
GROUP BY TABLE_NAME
ORDER BY COUNT(1) DESC;
...
Delete the first three rows of a dataframe in pandas
... @M.K if using this approach, you can use this in combination with pd.concat(). Something like, df2 = pd.concat([df.iloc[:3],df.iloc[10:]]).
– bdiamante
Jun 26 '19 at 17:00
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MySQL search and replace some text in a field
...t to search and replace based on the value of another field you could do a CONCAT:
update table_name set `field_name` = replace(`field_name`,'YOUR_OLD_STRING',CONCAT('NEW_STRING',`OTHER_FIELD_VALUE`,'AFTER_IF_NEEDED'));
Just to have this one here so that others will find it at once.
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How to convert an int array to String with toString method in Java [duplicate]
...
.mapToObj(String::valueOf)
.reduce((a, b) -> a.concat(",").concat(b))
.get();
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Returning value that was passed into a method
...lt;string>())
.Returns((string a, string b, string c) => string.Concat(a,b,c));
You always need to reference all the arguments, to match the method's signature, even if you're only going to use one of them.
shar...
Prepend text to beginning of string
...
Since we want to test prepend, and not just concatenate, I've updated the tests: jsperf.com/prepend-text-to-string/5
– metalim
Apr 22 '19 at 11:32
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How to get all columns' names for all the tables in MySQL?
...omma-delimited list of the columns in each table:
SELECT table_name,GROUP_CONCAT(column_name ORDER BY ordinal_position)
FROM information_schema.columns
WHERE table_schema = DATABASE()
GROUP BY table_name
ORDER BY table_name
Note : When using tables with a high number of columns and/or with long f...
Why .NET String is immutable? [duplicate]
... before StringBuilder becomes more efficient than the equivalent series of concatenations, with their inherent construction).
It would be a disadvantage if mutability was part of the purpose of an object (who'd want to be modeled by an Employee object whose salary could never ever change) though so...
Append TimeStamp to a File Name
...c string AppendTimeStamp(this string fileName)
{
return string.Concat(
Path.GetFileNameWithoutExtension(fileName),
DateTime.Now.ToString("yyyyMMddHHmmssfff"),
Path.GetExtension(fileName)
);
}
}
...