报表1列和多列

Question

我怎样写SQL语句正确加入我需要你的帮助来获得1行这些语句和多列

select to_char(SYSDATE, 'MONTH')AS "CURRINT MONTH" from dual; 
SELECT COUNT(PERSON_ID) AS TOTAL_Nsaudi FROM company_person_all 
WHERE (company_person_all.employee_status='Active') AND (company_person_all.citizenship !='SAUDI ARABIA'); 
SELECT COUNT(PERSON_ID) AS TOTAL_Saudi FROM company_person_all 
WHERE (company_person_all.employee_status='Active')AND (company_person_all.citizenship ='SAUDI ARABIA'); 
SELECT COUNT(PERSON_ID) AS Total_All FROM company_person_all 
WHERE ((company_person_all.citizenship !='SAUDI ARABIA'OR company_person_all.citizenship ='SAUDI ARABIA')AND company_person_all.employee_status='Active') 

Answer 1

更新：我的答案是仅限MySQL。 OP在评论中提到他正在使用Oracle，所以这对他不起作用。但是我会留下答案，以防其他人发现它对MySQL有用。

您可以根据沙特阿拉伯的公民条件进行分组。像这样：

SELECT COUNT(person_id) AS total, 
    IF(citizenship = 'SAUDI ARABIA', 'yes', 'no') AS is_saudi_arabia 
FROM company_person_all 
WHERE employee_status = 'Active' 
GROUP BY is_saudi_arabia 

这将返回两行;像这样：

+-------+-----------------+ 
+ total + is_saudi_arabia + 
+-------+-----------------+ 
+ 123 + yes    + 
+ 456 + no    + 
+-------+-----------------+ 

然后你可以找到你在服务器端使用的任何语言的值。这里的两个值（123和456）表示前两个查询的结果，并且这两个值的总和表示您上次查询的总数。

Answer 2

类似Ben的答案，但使用非特定供应商的SQL语法：

select count(*), is_saudi_arabia from 
(SELECT case citizenship 
      when 'SAUDI ARABIA' then 'yes' 
      else 'no' 
     end AS is_saudi_arabia 
FROM company_person_all 
WHERE employee_status = 'Active') as sq 
GROUP BY is_saudi_arabia 

编辑：另外，根据您的意见，使用上一行返回了一切：

SELECT to_char(SYSDATE, 'MONTH') AS "CURRENT MONTH", 
     COUNT(CASE WHEN a.citizenship<>'SAUDI ARABIA' THEN 1 END) AS TOTAL_NSaudi, 
     COUNT(CASE WHEN a.citizenship='SAUDI ARABIA' THEN 1 END) AS TOTAL_Saudi, 
     COUNT(*) AS Total_All 
FROM company_person_all a 
JOIN IFSAPP.EMP_EMPLOYED_TIME_ROW t 
    ON a.emp_no = t.emp_no and 
    SYSDATE between t.date_of_employment and t.date_of_leaving 
WHERE a.employee_status = 'Active'