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Full Discussion: mysql query in shellscript
Top Forums Shell Programming and Scripting mysql query in shellscript Post 302583313 by aish11 on Tuesday 20th of December 2011 06:25:19 AM
Old 12-20-2011
Code:
mysql> desc indata;
+--------------+---------------------+------+-----+---------+-------+
| Field        | Type                | Null | Key | Default | Extra |
+--------------+---------------------+------+-----+---------+-------+
| MDate   | date                | NO   | PRI | NULL    |       |
| OPrice | double              | NO   |     | 0       |       |
| CPrice | double              | NO   |     | 0       |       |
| Volume | double              | NO   |     | 0       |       |
| ADV          | bigint(20) unsigned | NO   |     | 0       |       |
| InID | int(20) unsigned    | NO   | PRI | NULL    |       |
+--------------+---------------------+------+-----+---------+-------+



sorry its MDate

---------- Post updated at 06:25 AM ---------- Previous update was at 06:23 AM ----------

Quote:
Originally Posted by radoulov
You could use either:

Code:
select adv 
from indata
where inid = '$INSTRUID'
and Date = ( 
    select max(Date) 
    from indata
    where inidi = '$INSTRUID'
    limit 1
    )
limit 1;

Or:

Code:
select a.adv
from indata a
join (
  select inid, max(Date) Date    
  from indata 
  where inid = '$INSTRUID' 
  group by inid
   ) b
  on a.inid =  b.inid
  and a.Date = b.Date
  where a.inid = '$INSTRUID'
  limit 1
  ;

I've added the limit clause for safety (not knowing your table structure and data, it's impossible to know if duplicates are possible).

thanks radoulov but can i get any shorcut code??
 

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MYSQLND_UH_SET_CONNECTION_PROXY(3)					 1					MYSQLND_UH_SET_CONNECTION_PROXY(3)

mysqlnd_uh_set_connection_proxy - Installs a proxy for mysqlnd connections

SYNOPSIS
bool mysqlnd_uh_set_connection_proxy (MysqlndUhConnection &$connection_proxy, [mysqli &$mysqli_connection]) DESCRIPTION
Installs a proxy object to hook mysqlnd's connection objects methods. Once installed, the proxy will be used for all MySQL connections opened with mysqli, mysql or PDO_MYSQL, assuming that the listed extensions are compiled to use the mysqlnd library. The function can be disabled with mysqlnd_uh.enable. If mysqlnd_uh.enable is set to FALSE the function will not install the proxy and always return TRUE. Additionally, an error of the type E_WARNING may be emitted. The error message may read like PHP Warning: mysqlnd_uh_set_connection_proxy(): (Mysqlnd User Handler) The plugin has been disabled by setting the configuration parameter mysqlnd_uh.enable = false. The proxy has not been installed [...]. PARAMETERS
o $connection_proxy - A proxy object of type MysqlndUhConnection. o $mysqli_connection - Object of type mysqli. If given, the proxy will be set for this particular connection only. RETURN VALUES
Returns TRUE on success. Otherwise, returns FALSE EXAMPLES
Example #1 mysqlnd_uh_set_connection_proxy(3) example <?php $mysqli = new mysqli("localhost", "root", "", "test"); $mysqli->query("SELECT 'No proxy installed, yet'"); class proxy extends MysqlndUhConnection { public function query($res, $query) { printf("%s(%s) ", __METHOD__, var_export(func_get_args(), true)); $ret = parent::query($res, $query); printf("%s returns %s ", __METHOD__, var_export($ret, true)); return $ret; } } mysqlnd_uh_set_connection_proxy(new proxy()); $mysqli->query("SELECT 'mysqlnd rocks!'"); $mysql = mysql_connect("localhost", "root", "", "test"); mysql_query("SELECT 'Ahoy Andrey!'", $mysql); $pdo = new PDO("mysql:host=localhost;dbname=test", "root", ""); $pdo->query("SELECT 'Moin Johannes!'"); ?> The above example will output: proxy::query(array ( 0 => NULL, 1 => 'SELECT 'mysqlnd rocks!'', )) proxy::query returns true proxy::query(array ( 0 => NULL, 1 => 'SELECT 'Ahoy Andrey!'', )) proxy::query returns true proxy::query(array ( 0 => NULL, 1 => 'SELECT 'Moin Johannes!'', )) proxy::query returns true SEE ALSO
mysqlnd_uh_set_statement_proxy(3), mysqlnd_uh.enable. PHP Documentation Group MYSQLND_UH_SET_CONNECTION_PROXY(3)
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