Get Age Using Mysql Functions

Get Age Using Mysql Functions:

 

·         select (YEAR(CURRENT_DATE()) – YEAR(‘2004-05-05’) –

(UNIX_TIMESTAMP(CURRENT_DATE())<UNIX_TIMESTAMP(CONCAT(YEAR(CURRENT_DATE()),

‘-‘, MONTH(‘2004-01-02’), ‘-‘, DAYOFMONTH(‘2008-01-02’))))) AS `age`

 

·         SELECT YEAR(DATE_SUB(NOW(), INTERVAL TO_DAYS(‘2004-01-02’) DAY)) AS age

MySQL 5.x: passing limits as stored procedure / function parameters

 

MySQL 5.x (at least 5.0.15 and earlier versions) does not allow using variables or procedure formal parameters with LIMIT. Here is a workaround:

CREATE PROCEDURE sp (
  IN LimitStart_ INT,
  IN LimitCnt_ INT
)
BEGIN
  SET @lim = CONCAT(‘ LIMIT ‘, LimitStart_, ‘,’, LimitCnt_);
  SET @q = "SELECT mycol FROM mytable";

  SET @q = CONCAT(@q, @lim);
  PREPARE st FROM @q;
  EXECUTE st;
  DEALLOCATE PREPARE st;
END;

 

Function to Convert given IP to Decimal

  • INET_ATON(expr)

Given the dotted-quad representation of a network address as a string, returns an integer that represents the numeric value of the address. Addresses may be 4- or 8-byte addresses.

mysql> SELECT INET_ATON('209.207.224.40');
        -> 3520061480

The generated number is always in network byte order. For the example just shown, the number is calculated as 209×2563 + 207×2562 + 224×256 + 40.

INET_ATON() also understands short-form IP addresses:

mysql> SELECT INET_ATON('127.0.0.1'), INET_ATON('127.1');
        -> 2130706433, 2130706433

Note

When storing values generated by INET_ATON(), it is recommended that you use an INT UNSIGNED column. If you use a (signed) INT column, values corresponding to IP addresses for which the first octet is greater than 127 cannot be stored correctly. See Section 10.2, “Numeric Types”.

  • To match a exact given IP range
  • select * from Customer_IP where
    INET_ATON(IP_End)>=INET_ATON(‘203.188.65.0
    ) and I

    NET_ATON(IP_Start)<=INET_ATON(‘203.188.65.0)

  • INET_NTOA(expr)

Given a numeric network address (4 or 8 byte), returns the dotted-quad representation of the address as a string.

mysql> SELECT INET_NTOA(3520061480);
        -> '209.207.224.40′