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How do I decrease an Integer in MySQL?


How do I decrease an Integer in MySQL?

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How do I decrease an Integer in MySQL?
Tag : mysql , By : OlioEngr
Date : January 12 2021, 01:40 AM

I hope this helps . Auto-increment values are not intended to be consecutive. They must be unique, that's all.
If you try to decrement the auto-increment value on error, you'll create a race condition in your app. For example:

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Increase or Decrease an Integer Within a NSString


Tag : ios , By : vferman
Date : March 29 2020, 07:55 AM
hop of those help? I'd recommend stuffing the HTML you parsed out of the XML into a "NSMutableString" object and then hunt through the mutable string object looking for the ranges of all substrings that match the pattern "font size=".
Once you find those ranges, you should be able to get the font sizes and then put them into a "NSInteger" via something like [NSString integerValue] which you can then increment and put back into the mutable string object. Obviously there's some extra detail I'm not thinking too hard about, like how to replace a "9" in the mutable string with a "10" or to tell the difference between a font size of "10" and one that's "100". But at least this should be a good start for you.

Increase/decrease integer by 50 with javascript and buttons


Tag : javascript , By : Thx1138.6
Date : March 29 2020, 07:55 AM
it fixes the issue What I want to achieve is having a textbox with the value 0 or blank, and a user to be able to input a number. Then i want the two buttons (one + and one -) to increase and decrease the value of the textbox by 50 for each onclick.
decreaseNumber.onclick = function() {
   textBox.value = parseInt(textBox.value) -50
}
increaseNumber.onclick = function() {
   textBox.value = parseInt(textBox.value) + 50
}

If selection = ?..then, how to decrease the a value of an integer attribute?


Tag : ruby-on-rails , By : PsyberMonkey
Date : March 29 2020, 07:55 AM
This might help you I don't necessarily see the point of what you try to do, but still I'll try to answer your specific problen.
First, we want to initialize the number of vacant cottages to 5, for this when you create the table you can put :
create_table "cottages", force: :cascade do |t|
  # ...
  t.integer  "no_of_vacant_cottage", default: 5
  #...
end
change_column :cottages, :no_of_vacant_cottage, :integer, :default => 5
class Reservation < ActiveRecord::Base
  validates :customer_name, :presence => true
  validates :address, :presence => true
  validates :contact_no, :presence => true
  belongs_to :cottage

  after_save :decrement_no_of_vacant_cottage

  def decrement_no_of_vacant_cottage
    c = self.cottage
    c.update(no_of_vacant_cottage: c.no_of_vacant_cottage -1)
  end
end
if @reservation.save
  # some code
else
  # handle the unsuccessful save
end
if @reservation.save
  notification_function
  # notification_function could be for instance flash[:notice]="Thank you for your reservation."
  # additional code code
else
  # handle the unsuccessful save
end

How to Decrease The Database Table Row Integer value


Tag : java , By : Andrew
Date : March 29 2020, 07:55 AM
help you fix your problem You need to add a where clause to the SQL statement.
You will also need to convert the text in the text field to a number.
int value = stocks - Integer.parseInt( quantPos.getText() );

String sql = "UPDATE Goods SET Stocks = ? WHERE ID = ?";

PreparedStatement stmt = connection.prepareStatement(sql);
stmt.setString( 1, value );
stmt.setString( 2, theIdHere );
stmt.executeUpdate();

Decrease integer working, identical increase integer is not


Tag : javascript , By : niel
Date : March 29 2020, 07:55 AM
I hope this helps you . .toFixed(1) converts the Number into a String.
When adding a number to a string, the number is implicitly converted into a string, thus adding the '0.1' string to the end.
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