SELECT COUNT внутри SELECT COUNT

Question

Я пытаюсь использовать этот код.

SELECT COUNT(SELECT COUNT(postnID) AS Total, 
postnID, Unit_DBM, job_type, 
level, internal_plantilla, INCID, 
ITEM_NO_2005, position_type, 
position_status 
FROM plantilla 
GROUP BY internal_plantilla, level, INCID, postnID, position_status  
ORDER BY internal_plantilla, postnID) as num 
FROM plantilla 

Но с ошибкой в ​​mysql. Как я могу выполнить подсчет количества внутри подсчета выбора?

Answer 1

вы можете сделать:

SELECT COUNT(*) from (SELECT COUNT(postnID) AS Total, 
postnID, Unit_DBM, job_type, 
level, internal_plantilla, INCID, 
ITEM_NO_2005, position_type, 
position_status 
FROM plantilla 
GROUP BY internal_plantilla, level, INCID, postnID, position_status  
ORDER BY internal_plantilla, postnID) as num