bash script to drop all tables from a database need tidying up still

gistfile1.txt

#!/bin/bash
MUSER="$1"
MPASS="$2"
MDB="$3"
HOST=$4
 
# Detect paths
MYSQL=$(which mysql)
AWK=$(which awk)
GREP=$(which grep)
 
if [ $# -ne  4 ]
then
        echo "Usage: $0 {MySQL-User-Name} {MySQL-User-Password} {MySQL-Database-Name}"
        echo "Drops all tables from a MySQL"
        exit 1
fi
 
TABLES=$($MYSQL -u $MUSER -p$MPASS -h $HOST $MDB -e 'show tables' | $AWK '{ print $1}' | $GREP -v '^Tables' )
 
for t in $TABLES
do
        echo "Deleting $t table from $MDB database..."
        $MYSQL -u $MUSER -p$MPASS -h $HOST $MDB -e "drop table $t"
done