Sql 单个查询中的多个计数（*）

我需要一个查询来获取基于某些条件的计数

select count(*) AS TOTAL_ROWS from table

select count(*) AS TOTAL_ERROR_ROWS from table where ERROR_CODE is not null

select count(*) AS TOTAL_SUCCESS_ROWS from table where ERROR_CODE is  null

我想在一个查询中获取所有三个结果。在谷歌搜索后，我尝试过如下方式，但不起作用：

select
   count(*) as TotalCount,
   count(case when { where ERROR_CODE is not null} then 1 else 0 end) as QualifiedCount
from
   wli_qs_report_attribute

select count(*) as TOTAL,
    count(case when ERROR_CODE is not null then 1 else 0 end) as ExecCount,
from wli_qs_report_attribute

它不起作用。

您可以使用UNION：

但它将在一列中显示所有三个计数。要在三个不同的列中显示，请尝试以下操作：

SELECT COUNT(*) AS TOTAL_ROWS
     , COUNT(CASE WHEN ERROR_CODE IS NOT NULL THEN * END) AS TOTAL_ERROR_ROWS
     , COUNT(CASE WHEN ERROR_CODE IS NULL THEN * END) AS TOTAL_SUCCESS_ROWS
FROM table 

您可以使用UNION：

但它将在一列中显示所有三个计数。要在三个不同的列中显示，请尝试以下操作：

SELECT COUNT(*) AS TOTAL_ROWS
     , COUNT(CASE WHEN ERROR_CODE IS NOT NULL THEN * END) AS TOTAL_ERROR_ROWS
     , COUNT(CASE WHEN ERROR_CODE IS NULL THEN * END) AS TOTAL_SUCCESS_ROWS
FROM table 

而不是：

count(case when ERROR_CODE is not null then 1 else 0 end) as ExecCount

尝试：

而不是：

count(case when ERROR_CODE is not null then 1 else 0 end) as ExecCount

尝试：

选择总计行、总计错误行、总计行-总计错误行作为总计成功行 从…起 选择计数*作为总计行 ，计数器错误代码为总错误行 从桌子上 作为T

选择总计行、总计错误行、总计行-总计错误行作为总计成功行 从…起 选择计数*作为总计行 ，计数器错误代码为总错误行 从桌子上 AS T

SELECT COUNT(*) AS TOTAL_ROWS,
       SUM(CASE WHEN ERROR_CODE IS NOT NULL THEN 1 end) AS TOTAL_ERROR_ROWS,
       SUM(CASE WHEN ERROR_CODE IS NULL THEN 1 END) AS TOTAL_SUCCESS_ROWS 
FROM table