Question

我正在努力做一些事情。第一个子查询是总扫描计数。第二个子查询在60分钟内扫描计数。提前抱歉被压缩了。两者分开时都能正常运行。

我得到一个“当没有用EXISTS引入子查询时，在选择列表中只能指定一个表达式”错误在第12和22行我不熟悉存在。

SELECT
MONTH(F_IP_HSP_SUM_MED_ADMIN.SCHEDULED_DATETIME) AS MONTH
,V_MAR_BARCODE_COMPLIANCE.DEPARTMENT_NAME AS UNIT
,(SELECT DISTINCT 
MONTH(F_IP_HSP_SUM_MED_ADMIN.SCHEDULED_DATETIME) AS MONTH
,V_MAR_BARCODE_COMPLIANCE.DEPARTMENT_NAME AS UNIT
,count(med_scanned_bool)
FROM F_IP_HSP_SUM_MED_ADMIN
INNER JOIN V_MAR_BARCODE_COMPLIANCE ON F_IP_HSP_SUM_MED_ADMIN.ORDER_MED_ID=V_MAR_BARCODE_COMPLIANCE.ORDER_MED_ID AND LINE=MAR_LINE
WHERE MED_SCANNED_BOOL=1
GROUP BY MONTH(SCHEDULED_DATETIME), V_MAR_BARCODE_COMPLIANCE.DEPARTMENT_NAME
) AS SCANNED_D
,(SELECT DISTINCT
MONTH(F_IP_HSP_SUM_MED_ADMIN.SCHEDULED_DATETIME) AS MONTH
,V_MAR_BARCODE_COMPLIANCE.DEPARTMENT_NAME AS UNIT
,count(med_scanned_bool) AS SCANNED_N
FROM F_IP_HSP_SUM_MED_ADMIN
INNER JOIN V_MAR_BARCODE_COMPLIANCE ON F_IP_HSP_SUM_MED_ADMIN.ORDER_MED_ID=V_MAR_BARCODE_COMPLIANCE.ORDER_MED_ID AND LINE=MAR_LINE
WHERE MED_SCANNED_BOOL=1
AND SECONDS_AFTER_SCHEDULED<'3600' --Within 60 Minute Window
GROUP BY MONTH(SCHEDULED_DATETIME), V_MAR_BARCODE_COMPLIANCE.DEPARTMENT_NAME
)AS SCANNED_N

FROM F_IP_HSP_SUM_MED_ADMIN
INNER JOIN V_MAR_BARCODE_COMPLIANCE ON F_IP_HSP_SUM_MED_ADMIN.ORDER_MED_ID=V_MAR_BARCODE_COMPLIANCE.ORDER_MED_ID AND LINE=MAR_LINE

Answer 1

(SELECT DISTINCT 
   MONTH(F_IP_HSP_SUM_MED_ADMIN.SCHEDULED_DATETIME) AS MONTH,
   V_MAR_BARCODE_COMPLIANCE.DEPARTMENT_NAME AS UNIT,
   count(med_scanned_bool)
...) AS SCANNED_D

在查询的列选择部分中，您只能有返回一个列的子选择，而不是3.

如果您正在使用具有公用表表达式支持的数据库，则可以通过加入CTE来替换多列子选择。

子查询中存在错误

1 个答案: