七十六、SAP中数据库的查询用法之 COUNT(总数)，SUM（求和），AVG（求平均），GROUP BY（分组）

*&---------------------------------------------------------------------*
*& Report Z_TIANPAN_20190717_HELLO
*&---------------------------------------------------------------------*
*&
*&---------------------------------------------------------------------*
REPORT z_tianpan_20190717_hello.

DATA:counts TYPE i, total TYPE p DECIMALS 2, average TYPE f.
DATA:connid LIKE sbook-connid.

SELECT connid COUNT(*) SUM( luggweight ) AVG( luggweight )
INTO (connid,counts,total,average)
FROM sbook
GROUP BY connid.
  CHECK sy-subrc = 0.
  WRITE:/ ‘SY-DBCNT=‘, sy-dbcnt , ‘CONNID=‘, connid , ‘COUNT=‘, counts , ‘TOTAL=‘, total,‘AVERAGE=‘, average.
  CHECK total > 10.
  WRITE:  ‘总数大于10 . ‘.
ENDSELECT.

* 字符串拼接
WRITE: / ‘青青子衿‘ & ‘悠悠我心‘.

BREAK-POINT.