SELECT bq,zr,zx,yx,strt(strt(strt(strt(strt(strt(hc3pxtc,x1,'**'),x2,'**'),x3,'**'),x4,'**'),x5,'**'),x6,'**') zd0 FROM tmp000 INTO CURSOR tmp9991
SELECT bq,zr,zx,yx,(at('**',zd0,1)+2)/3 x1,(at('**',zd0,2)+2)/3 x2,(at('**',zd0,3)+2)/3 x3,(at('**',zd0,4)+2)/3 x4,(at('**',zd0,5)+2)/3 x5,(at('**',zd0,6)+2)/3 x6 FROM tmp9991 INTO CURSOR tmp9992
上面的9.0能通过，想两句并一句缩短运行时间，可转换成下面就出错，是什么原因？
SELECT bq,zr,zx,yx,(at('**',zd0,1)+2)/3 x1,(at('**',zd0,2)+2)/3 x2,(at('**',zd0,3)+2)/3 x3,(at('**',zd0,4)+2)/3 x4,(at('**',zd0,5)+2)/3 x5,(at('**',zd0,6)+2)/3 x6 FROM (SELECT bq,zr,zx,yx,strt(strt(strt(strt(strt(strt(hc3pxtc,x1,'**'),x2,'**'),x3,'**'),x4,'**'),x5,'**'),x6,'**') zd0 FROM tmp000) INTO CURSOR tmp9992

hc3pxtc='03-06-38-09-12-34-15-18-21-24-27-30-33-01-40-04-07-35-10-13-16-19-37-22-25-41-28-31-02-05-08-11-36-14-42-17-39-20-23-26-29-32-'
原始表