跨多组访问表的SQL计数求和查询

Question

我有一个MS Access查询（用SQL创建），用于统计设备状态表中日期列中非空值的出现次数。该表包含特定制造工厂的所有设备。查询也计算总设备，我们没有NULL值。总共有12个不同的工厂，每个工厂都有自己相同的访问表。我需要创建一个统一的SQL查询，将每个计数的总和转换为所有工厂的主计数。

状态表的结构，命名为“_review_status”是：

equip_number, text 
review_a_analysis, date 
review_b_analysis, date 
review_c_analysis, date 
review_d_analysis, date 
review_e_analysis, date 
review_f_analysis, date 
review_g_analysis, date 

工作查询的结果（在一个表上）这个样子。

a b c d e f g equip_count 
17 31 0 94 13 12 44 1249 

新的结果应该看起来与上面完全一样，只不过因为查询查看所有12组表格。

这里是一个工作表查询：在dept1_equipment表

SELECT 
Count(dept1_review_status.review_a_analysis) AS a, 
Count(dept1_review_status.review_b_analysis) AS b, 
Count(dept1_review_status.review_c_analysis) AS c, 
Count(dept1_review_status.review_d_analysis) AS d, 
Count(dept1_review_status.review_e_analysis) AS e, 
Count(dept1_review_status.review_f_analysis) AS f, 
Count(dept1_review_status.review_g_analysis) AS g, 
Count(dept1_equipment.dept1_equip_number) AS equip_count 
FROM dept1_equipment 
LEFT JOIN dept1_review_status 
ON dept1_equipment.dept1_equip_number = 
dept1_review_status.dept1_equip_number; 

的加入是用来获取所有设备的完整计数每个部门。

非常感谢。

鲍勃

Answer 1

考虑聚合查询运行的所有12组的联合查询，然后使用保存的联合查询执行另一个最后汇总查询：

UNION

SELECT 
    Count(dept1_review_status.review_a_analysis) AS a, 
    Count(dept1_review_status.review_b_analysis) AS b, 
    Count(dept1_review_status.review_c_analysis) AS c, 
    Count(dept1_review_status.review_d_analysis) AS d, 
    Count(dept1_review_status.review_e_analysis) AS e, 
    Count(dept1_review_status.review_f_analysis) AS f, 
    Count(dept1_review_status.review_g_analysis) AS g, 
    Count(dept1_equipment.dept1_equip_number) AS equip_count 
FROM dept1_equipment LEFT JOIN dept1_review_status 
ON dept1_equipment.dept1_equip_number = dept1_review_status.dept1_equip_number; 

UNION ALL 

SELECT 
    Count(dept2_review_status.review_a_analysis) AS a, 
    Count(dept2_review_status.review_b_analysis) AS b, 
    Count(dept2_review_status.review_c_analysis) AS c, 
    Count(dept2_review_status.review_d_analysis) AS d, 
    Count(dept2_review_status.review_e_analysis) AS e, 
    Count(dept2_review_status.review_f_analysis) AS f, 
    Count(dept2_review_status.review_g_analysis) AS g, 
    Count(dept2_equipment.dept2_equip_number) AS equip_count 
FROM dept2_equipment LEFT JOIN dept2_review_status 
ON dept2_equipment.dept2_equip_number = dept2_review_status.dept2_equip_number; 

UNION ALL 

SELECT 
    Count(dept3_review_status.review_a_analysis) AS a, 
    Count(dept3_review_status.review_b_analysis) AS b, 
    Count(dept3_review_status.review_c_analysis) AS c, 
    Count(dept3_review_status.review_d_analysis) AS d, 
    Count(dept3_review_status.review_e_analysis) AS e, 
    Count(dept3_review_status.review_f_analysis) AS f, 
    Count(dept3_review_status.review_g_analysis) AS g, 
    Count(dept3_equipment.dept3_equip_number) AS equip_count 
FROM dept3_equipment LEFT JOIN dept3_review_status 
ON dept3_equipment.dept3_equip_number = dept3_review_status.dept3_equip_number; 

...other 9 tables... 

FINAL

SELECT Sum(unionqry.a), 
     Sum(unionqry.b), 
     Sum(unionqry.c), 
     Sum(unionqry.d), 
     Sum(unionqry.e), 
     Sum(unionqry.f), 
     Sum(unionqry.g), 
     Sum(unionqry.h), 
     Sum(unionqry.equip_count) 
FROM unionqry 

或者，你可以，如果MS接入取决于复杂性允许在一个查询中包含了所有：

SELECT Sum(unionqry.a), 
     Sum(unionqry.b), 
     Sum(unionqry.c), 
     Sum(unionqry.d), 
     Sum(unionqry.e), 
     Sum(unionqry.f), 
     Sum(unionqry.g), 
     Sum(unionqry.h), 
     Sum(unionqry.equip_count) 
FROM (...above union query)... As unionqry