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What's the difference between using INDEX vs KEY in MySQL?
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270
There's no difference. They are synonyms.
From the CREATE TABLE manual entry:
KEY is normal...
How to tell Xcode where my info.plist and .pch files are
... The particular setting is "Prefix Header" under (in my case) Apple LLVM 6.0 - Language.
– lewiguez
Apr 1 '15 at 21:01
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Align elements side by side
...ired)
– intrepidis
Apr 16 '13 at 16:06
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How to vertically align an image inside a div
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+550
The only (and the best cross-browser) way as I know is to use an inline-block helper with height: 100% and vertical-align: middle on b...
Get JavaScript object from array of objects by value of property [duplicate]
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answered Dec 20 '12 at 2:01
elclanrselclanrs
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Rails 3 check if attribute changed
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Peter BrownPeter Brown
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How to create a new (and empty!) “root” branch?
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230
Use the --orphan when creating the branch:
git checkout --orphan YourBranchName
This will cre...
@UniqueConstraint and @Column(unique = true) in hibernate annotation
...lauber NéspoliGlauber Néspoli
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Sql Server equivalent of a COUNTIF aggregate function
... a CASE statement, like this:
SELECT SUM(CASE WHEN myColumn=1 THEN 1 ELSE 0 END)
FROM AD_CurrentView
Note: in my own test NULLs were not an issue, though this can be environment dependent. You could handle nulls such as:
SELECT SUM(CASE WHEN ISNULL(myColumn,0)=1 THEN 1 ELSE 0 END)
FROM AD_Curren...
How to change the CHARACTER SET (and COLLATION) throughout a database?
...n:
ALTER DATABASE <database_name> CHARACTER SET utf8 COLLATE utf8mb4_0900_ai_ci;
change table collation:
ALTER TABLE <table_name> CONVERT TO CHARACTER SET utf8 COLLATE utf8mb4_0900_ai_ci;
change column collation:
ALTER TABLE <table_name> MODIFY <column_name> VARCHAR(255) CH...