我有一个有效的 SQL 语句
SELECT * FROM eventsTable WHERE columnName='Business'
我想将其添加为子查询...
COUNT(Business) AS row_count
我该怎么做呢?
这可能是最简单的方法,但不是最漂亮的:
SELECT *,
(SELECT Count(*) FROM eventsTable WHERE columnName = 'Business') as RowCount
FROM eventsTable
WHERE columnName = 'Business'
这也可以在不使用group by
SELECT *, COUNT(*) OVER () as RowCount
FROM eventsTables
WHERE columnName = 'Business'
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