SQL语句统计问题，不想写union all

建表测试语句：

CREATE TABLE stbuu_cause109_20160331 (
intenbid BIGINT,
intrsrp00 BIGINT,
intrsrp01 BIGINT,
intrsrp02 BIGINT,
intrsrp03 BIGINT,
intrsrp04 BIGINT,
intrsrp05 BIGINT,
intrsrp06 BIGINT
);
插入测试数据：

INSERT INTO stbuu_cause109_20160331(intenbid,intrsrp00,intrsrp01,intrsrp02,intrsrp03,intrsrp04,intrsrp05,intrsrp06) values(1110,1,0,0,0,0,0,0);
INSERT INTO stbuu_cause109_20160331(intenbid,intrsrp00,intrsrp01,intrsrp02,intrsrp03,intrsrp04,intrsrp05,intrsrp06) values(1110,0,1,0,0,0,0,0);
INSERT INTO stbuu_cause109_20160331(intenbid,intrsrp00,intrsrp01,intrsrp02,intrsrp03,intrsrp04,intrsrp05,intrsrp06) values(1110,0,0,1,0,0,0,0);
INSERT INTO stbuu_cause109_20160331(intenbid,intrsrp00,intrsrp01,intrsrp02,intrsrp03,intrsrp04,intrsrp05,intrsrp06) values(1110,0,0,0,1,0,0,0);
INSERT INTO stbuu_cause109_20160331(intenbid,intrsrp00,intrsrp01,intrsrp02,intrsrp03,intrsrp04,intrsrp05,intrsrp06) values(1110,0,0,0,0,1,0,0);
INSERT INTO stbuu_cause109_20160331(intenbid,intrsrp00,intrsrp01,intrsrp02,intrsrp03,intrsrp04,intrsrp05,intrsrp06) values(1110,0,0,0,0,0,1,0);
INSERT INTO stbuu_cause109_20160331(intenbid,intrsrp00,intrsrp01,intrsrp02,intrsrp03,intrsrp04,intrsrp05,intrsrp06) values(1110,0,0,0,0,0,0,1);

select * from stbuu_cause109_20160331;

需要实现的效果

结果语句是：

select intenbid,-141 as rsrp,sum(intrsrp00) countt from stbuu_cause109_20160331 group by intenbid UNION all
select intenbid,-140 as rsrp,sum(intrsrp01) countt from stbuu_cause109_20160331 group by intenbid UNION all
select intenbid,-139 as rsrp,sum(intrsrp02) countt from stbuu_cause109_20160331 group by intenbid UNION all
select intenbid,-138 as rsrp,sum(intrsrp03) countt from stbuu_cause109_20160331 group by intenbid UNION all
select intenbid,-137 as rsrp,sum(intrsrp04) countt from stbuu_cause109_20160331 group by intenbid UNION all
select intenbid,-136 as rsrp,sum(intrsrp05) countt from stbuu_cause109_20160331 group by intenbid UNION all
select intenbid,-135 as rsrp,sum(intrsrp06) countt from stbuu_cause109_20160331 group by intenbid ;

目前这种实现方式不靠谱，intrsrp00-99个字段，sql写99个union all 语句会内存溢出，求大神解答，谢谢

数据库用的Postgresql