shell语句查询mysql数据库的常用方法

sql="select * from CHANNELIDCHANGELOG where OLDID=$a order by TIME desc;";
ret=$(mysql -u $DB_USER -h ${DB_IP} -p${DB_PASSWD} $DB_NAME -e "$sql"');
echo $ret

ret=$(mysql -u $DB_USER -h ${DB_IP} -p${DB_PASSWD} $DB_NAME -e "$sql"|awk 'NR>1');

ret=$(mysql -u $DB_USER -h ${DB_IP} -p${DB_PASSWD} $DB_NAME -e "$sql"|awk 'NR>1'|awk '{print $0"\n"}');