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How to see indexes for a database or table in MySQL?
...pecified 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;
...
Selecting data from two different servers in SQL Server
...vers, here's how:
In SSMS open Registered Servers and create a New Server Group under Local Server Groups.
Under this group create New Server Registration for each server you wish to query. If the DB names are different ensure to set a default for each in the properties.
Now go back to the Group...
Left Align Cells in UICollectionView
...tAttributes.filter({ $0.representedElementCategory == .cell })
// Group cell attributes by row (cells with same vertical center) and loop on those groups
for (_, attributes) in Dictionary(grouping: cellAttributes, by: { ($0.center.y / 10).rounded(.up) * 10 }) {
// Set th...
IntelliJ Split Window Navigation
If I split the editor window (horizontal or vertical) into N tab groups, how do I switch/toggle from one tab group to another via the keyboard? If all of the tabs are in the same group you can switch from each tab easily (CTRL + right/left arrow), but when they're in separate tab groups I can't. I...
Applying a function to every row of a table using dplyr?
...
You need to group by row:
iris %>% group_by(1:n()) %>% mutate(Max.Len= max(Sepal.Length,Petal.Length))
This is what the 1 did in adply.
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Build an ASCII chart of the most commonly used words in a given text [closed]
...
w=($<.read.downcase.scan(/[a-z]+/)-%w{the and of to a i it in or is}).group_by{|x|x}.map{|x,y|[-y.size,x]}.sort[0,22]
k,l=w[0]
puts [?\s+?_*m=76-l.size,w.map{|f,x|?|+?_*(f*m/k)+"| "+x}]
Instead of using any command line switches like the other solutions, you can simply pass the filename as ar...
How to remove single character from a String
...egexp to handle newlines like normal characters (just in case).
"(.{2})" - group $1 collecting exactly 2 characters
"." - any character at index 2 (to be squeezed out).
"(.*)" - group $2 which collects the rest of the inputString.
"$1$2" - putting group $1 and group $2 together.
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When to use an assertion and when to use an exception
...ng, but an exception would let the program continue running.
Note that if(group != null) is not an assertion, that is just a conditional.
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follo...
Repeat table headers in print mode
...Others need some help: Add this to your CSS:
thead {display: table-header-group;}
tfoot {display: table-header-group;}
Opera 7.5 and IE 5 won't repeat headers no matter what you try.
(source)
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SQL update query using joins
...
UPDATE im
SET mf_item_number = gm.SKU --etc
FROM item_master im
JOIN group_master gm
ON im.sku = gm.sku
JOIN Manufacturer_Master mm
ON gm.ManufacturerID = mm.ManufacturerID
WHERE im.mf_item_number like 'STA%' AND
gm.manufacturerID = 34
To make it clear... The UPDATE clause can ...