ORA-00923：找不到FROM关键字，我不断收到此错误的原因是什么？

Question

创建一个包含官员所有数据的视图，包括他们参与提交费用的犯罪总数。要加快人员查询速度，请存储此视图数据并安排每两周更新一次的数据。我不明白为什么FROM的放置导致了这个问题，我没看到什么？

CREATE MATERIALIZED VIEW OFFICERVW
REFRESH COMPLETE
START WITH SYSDATE NEXT SYSDATE + 14
AS 
SELECT officer_id, First, Last, precinct, 
  badge, phone, status, COUNT crime_id count 
FROM officers JOIN crime_officers USING(officer_id)
GROUP BY officer_id, First, Last, precinct, badge, phone, status;

Answer 1

你有一点语法错误，你需要用parens包围计数：

CREATE MATERIALIZED VIEW OFFICERVW
REFRESH COMPLETE
START WITH SYSDATE NEXT SYSDATE + 14
AS 
SELECT officer_id, First, Last, precinct, badge, phone, status, COUNT(crime_id) as count 
FROM officers JOIN crime_officers USING(officer_id)
GROUP BY officer_id, First, Last, precinct, badge, phone, status;