SQL查询包含格式错误的结尾

Question

I got the following error when the server tried to execute the SQL request.

Please, I'd like to know what is incorrect.

Exception Description: Syntax error parsing [SELECT t FROM Trackings t GROUP BY t.dateTrackings WHERE EXISTS (SELECT DISTINCT tr.dateTrackings from Trackings tr )].

Answer 1

You need to mention the column in the SELECT clause.

You cant just mention the table alias t

and

WHERE should come before GROUP BY .
Any condition to apply upon GROUP BY .. You need to use HAVING clause

Something like :
SELECT t.dateTrackings, count(*) FROM Trackings t WHERE EXISTS (SELECT * FROM Trackings tr WHERE tr.dateTrackings = t.dateTrackings) GROUP BY t.dateTrackings