MySQL query get first and last day of month

MySQL query get first and last day of month

# For current month
SELECT DATE_FORMAT(CURDATE(), '%Y-%m-01') AS `First Day Of Current Month`;

SELECT LAST_DAY(CURDATE()) AS `Last Day Of Current Month`;


# For previous month
SELECT DATE_FORMAT(CURDATE() - INTERVAL 1 MONTH, '%Y-%m-01') AS `First Day Of Previous Month`;

SELECT LAST_DAY(CURDATE() - INTERVAL 1 MONTH) AS `Last Day Of Previous Month`;

# For next month
SELECT DATE_FORMAT(CURDATE() + INTERVAL 1 MONTH, '%Y-%m-01') AS `First Day Of Next Month`;

SELECT LAST_DAY(CURDATE() + INTERVAL 1 MONTH) AS `Last Day Of Next Month`; 

Mysql Date time

{$start} 00:00:00'  AND created<='{$end} 23:59:59'

mysql get last value of row

SELECT Name, Dt, Value
FROM (
    SELECT Name, Dt, Value, Name Name2
    FROM YourTable 
    UNION ALL
    SELECT '' Name, 'Last_Value', T.Value, T.Name Name2
    FROM YourTable T
       JOIN (
         SELECT Name, MAX(dt) MaxDt
         FROM YourTable
         GROUP BY Name
       ) T2 ON T.Name = T2.Name AND T.dt = T2.MaxDt
    ORDER BY Name2, Dt, Value
  ) t

mysql sum each group

CREATE TABLE YourTable (Name varchar(1),
                        dt datetime,
                        Value int);

INSERT INTO YourTable VALUES
('A','2013-01-01',3),
('A','2013-01-02',4),
('B','2013-01-04',2),
('B','2013-01-05',8);


SELECT Name, Dt, IF(Name='',summedTotal,Value) Value
FROM (

  SELECT @summedTotal:=IF(@prevRow=Name,@summedTotal+Value,Value) summedTotal,
    Name, Dt, Value, Name Name2,
    @prevRow:=Name
  FROM YourTable
    JOIN (SELECT @summedTotal:=0) t
  UNION ALL
  SELECT summedTotal, '' Name, 'Last_Value', T.Value, T.Name Name2, pr
  FROM (
      SELECT @summedTotal:=IF(@prevRow=Name,@summedTotal+Value,Value) summedTotal,
        Name, Dt, Value, Name Name2,
        @prevRow:=Name pr
      FROM YourTable
        JOIN (SELECT @summedTotal:=0) t
    ) T
    JOIN (
      SELECT Name, MAX(dt) MaxDt
      FROM YourTable
      GROUP BY Name
    ) T2 ON T.Name = T2.Name AND T.dt = T2.MaxDt
  ORDER BY Name2, Dt, Value
  ) t

Remove standy Linux

xset s off
xset s noblank
xset -dpms

to the ~/.X.d/xset file has worked for me.

forgot Mac OS X account password

If you have forgot Mac OS X account password then there is a tricky method which let you create a new administrator account on Mac OS X and through that admin account you can reset password of previous account.
So, let’s see how to create an administrator account on Mac while you lost your Mac passwords. This guide written using Mac OS X Snow Leopard.

Creating new Mac OS X account to recover old account

Step 1

Restart system and hold “Cmd + S” keys from keyboard until it shows Terminal.

Step 2

Now type the following commands one after one and press “Enter” button after each command to execute it individually
/sbin/mount -uaw
rm /var/db/.applesetupdone
reboot

Step 3

“Reboot” command will restart the Mac and you will see the “Welcome wizard” after beautiful welcome messages animation.

Follow all the wizard instructions, until you see the following screen to create new account. Fill all entries and hit Continue button.

This will create a new administrator account and automatically log into it.

Reset old user account password

Now you can reset the password of your old Mac OS X account using this new account, here is the process.

Step-4

Click on “Apple icon” and then “System Preferences”

Click on “Account”s icon

Step-5

Here you can see all Mac OS X user accounts are listed, new account “TrickyWays” that we have created and “Susan” the old one that we want to recover.
Click on lock icon to enable prev. account “Susan” and reset its password.

Enter the Password of current user account and hit OK button

Step-6

Now your prev. account is enabled for changes, select that and hit the “Reset Password” button

Enter “New password”, “Password hint” and hit “Reset Password” button to reset account password.

Now log off and log in to your prev. account “Susan” and you can delete the account “TrickyWays” that we have created to recover prev. account “Susan”.

Get and set with C#

You don't need to use set or get. You could write functions named setFoo or getFoo instead of using a property Foo:

class Point {
    double x, y;
    public Point(double x, double y) {
        this.x = x;
        this.y = y;
    }
    public double GetX() { return x; }
    public void SetX(double x) { this.x = x; }
    public double GetY() { return y; }
    public void SetY(double y) { this.y = y; }
}

But that's a real pain -- you'd rather write pt.Y = 3; and be able to write things like pt.Y += 5; , instead of pt.SetY(pt.GetY() + 5); .
So instead C# has properties:

class Point {
    double x, y;
    public Point(double x, double y) {
        this.x = x;
        this.y = y;
    }
    public double X {
        get { return x; }
        set { x = value; }
    }
    public double Y {
        get { return y; }
        set { y = value; }
    }
}

Inside the setter, the keyword 'value' is the variable containing the value that is getting assigned to the property Y.
The pattern of having properties directly backed by fields is so common that in C# 3, shortcut syntax was added.

class Point {
    public Point(double x, double y) {
        X = x;
        Y = y;
    }
    public double X { get; set; }
    public double Y { get; set; }
}

There are a few reasons to use properties, instead of public fields. One is that properties can be virtual. Another is that you can make the setters for a property private. Another is that properties have a 'special' meaning to things that inspect classes at runtime. There are frameworks for conveniently talking to databases and for reading and writing objects to and from XML and all sorts of other things -- and they automatically look at the object's properties (and not private fields or other things) to see how to do their job.