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Drop all tables whose names begin with a certain string
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MYSQL: SELECT concat('DROP TABLE ',TABLE_NAME,";") as data FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME LIKE '[prefix]%' --- for those who like me found this thread
– Andre
Nov 6 '12 at 0:27
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How do I join two lists in Java?
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In Java 8:
List<String> newList = Stream.concat(listOne.stream(), listTwo.stream())
.collect(Collectors.toList());
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Why is extending native objects a bad practice?
... at all:
// new types
const AddMonoid = {
empty: () => 0,
concat: (x, y) => x + y,
};
const ArrayMonoid = {
empty: () => [],
concat: (acc, x) => acc.concat(x),
};
const ArrayFold = {
reduce: xs => xs.reduce(
type(xs[0]).monoid.concat,
type(xs[0])...
vim - How to delete a large block of text without counting the lines?
..., and leaving the last mails intact. I do a mark, then I enter for example 50000 followed by gg to go to line 50.000, then I delete all lines in-between. works like a charm!
– otmezger
Feb 21 '15 at 0:13
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Entity Attribute Value Database vs. strict Relational Model Ecommerce
...ntity.parent_id AS order_id,
sales_order_entity.entity_id,
CONCAT(CONCAT(UCASE(MID(sales_order_entity_varchar.value,1,1)),MID(sales_order_entity_varchar.value,2)), "Address") as type,
GROUP_CONCAT(
CONCAT( eav_attribute.attribute_code," ::::: ", sales_order_entity_v...
How can you determine how much disk space a particular MySQL table is taking up?
...eneric query where the maximum unit display is TB (TeraBytes)
SELECT
CONCAT(FORMAT(DAT/POWER(1024,pw1),2),' ',SUBSTR(units,pw1*2+1,2)) DATSIZE,
CONCAT(FORMAT(NDX/POWER(1024,pw2),2),' ',SUBSTR(units,pw2*2+1,2)) NDXSIZE,
CONCAT(FORMAT(TBL/POWER(1024,pw3),2),' ',SUBSTR(units,pw3*2+1,2)) T...
小心！创业者不可不知的互联网家装惊天伪命题 - 资讯 - 清泛网 - 专注C/C++...
...便是互联网家装的出现。经过一年的发展，我们发现，在50000亿的巨大的市场规模中，互联网家装当前的占比显然并不是决定整个家装市场的走向主要力量，传统家装依然在发挥着举足轻重的作用。而对于原本就在家装市场中占...
Prepend a level to a pandas MultiIndex
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A nice way to do this in one line using pandas.concat():
import pandas as pd
pd.concat([df], keys=['Foo'], names=['Firstlevel'])
An even shorter way:
pd.concat({'Foo': df}, names=['Firstlevel'])
This can be generalized to many data frames, see the docs.
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Storing Data in MySQL as JSON
...REPLACE(column, '{', ''), '}', ','), '"', ''),
LOCATE(
CONCAT('myfield', ':'),
REPLACE(REPLACE(REPLACE(column, '{', ''), '}', ','), '"', '')
) + CHAR_LENGTH(CONCAT('myfield', ':')),
LOCATE(
',',
SUBSTRING(
REPLAC...
How to use GROUP BY to concatenate strings in SQL Server?
...r Vnext, SQL Azure you can use string_agg as below:
select id, string_agg(concat(name, ':', [value]), ', ')
from #YourTable
group by id
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