need to modify Mysql query

Hi,

I want to run below query on shellscript but having one problm.

ADV=$( mysql -h "$IP_ADDR" -u "$USER_NAME"  "$TABLE_NAME" -BNe" SELECT ADV FROM indata where inid='$INSTRUID' and  Date='$latest Date';" )

here Date column contans different below dates

2011-12-01
2011-12-05
2011-12-07
2011-12-08
.
.
2011-12-13

and i want to catch date as latest date i.e 2011-12-13

finally the query looks like

ADV=$( mysql -h "$IP_ADDR" -u "$USER_NAME"  "$TABLE_NAME" -BNe" SELECT ADV FROM indata where inid='$INSTRUID' and  Date='2011-12-13';" )

Also i want to make this script in minimum size code.

please help me to catch latest date.

Thanks