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CHECK constraint in MySQL is not working
...GER `test_before_insert` BEFORE INSERT ON `Test`
FOR EACH ROW
BEGIN
IF CHAR_LENGTH( NEW.ID ) < 4 THEN
SIGNAL SQLSTATE '12345'
SET MESSAGE_TEXT := 'check constraint on Test.ID failed';
END IF;
END$$
DELIMITER ;
Prior to MySQL 5.5 you had to cause an error, e.g. ca...
What exactly does the .join() method do?
... problem in your case is that a string is itself iterable, giving out each character in turn. Your code breaks down to this:
"wlfgALGbXOahekxSs".join("595")
which acts the same as this:
"wlfgALGbXOahekxSs".join(["5", "9", "5"])
and so produces your string:
"5wlfgALGbXOahekxSs9wlfgALGbXOahekxS...
How do you remove all the options of a select box and then add one option and select it with jQuery?
Using core jQuery, how do you remove all the options of a select box, then add one option and select it?
24 Answers
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How to escape single quotes in MySQL
...
Put quite simply:
SELECT 'This is Ashok''s Pen.';
So inside the string, replace each single quote with two of them.
Or:
SELECT 'This is Ashok\'s Pen.'
Escape it =)
...
Export from sqlite to csv using shell script
...qlite3
You have a separate call to sqlite3 for each line; by the time your select runs, your .out out.csv has been forgotten.
Try:
#!/bin/bash
./bin/sqlite3 ./sys/xserve_sqlite.db <<!
.headers on
.mode csv
.output out.csv
select * from eS1100_sensor_results;
!
instead.
sh/bash methods
You can...
In Mongoose, how do I sort by date? (node.js)
... error sort() only takes 1 Argument :
Post.find({}, {
'_id': 0, // select keys to return here
}, {sort: '-date'}, function(err, posts) {
// use it here
});
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select * vs select column
If I just need 2/3 columns and I query SELECT * instead of providing those columns in select query, is there any performance degradation regarding more/less I/O or memory?
...
How to make a .jar out from an Android Studio project
...enerated jar into your required project's lib folder-->right click-->select "add as library"
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.gitignore for Visual Studio Projects and Solutions
.... In Visual Studio 2017, you can just right click on the solution file and select Add solution to source control
This will add two files to your source folder.
.gitattributes
.gitignore
This is the easiest way.
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Remove outline from select box in FF
Is it possible to remove the dotted line surrounding a selected item in a select element?
12 Answers
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