Mysql SQL错误[102][42000]：靠近'；的语法不正确'；

我认为您需要

DATEDIFF

函数和

now（）

，因为getdate（）是sql server函数

select customerno,(GETDATE() - date_connected) as days_connected from (
    select customerno, min(ch.connectiondatetime) as  date_connected
    from ConnectionHistory ch
    GROUP by customerno 
    having (GETDATE() - date_connected > 90)
)

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示例数据和预期输出有助于正确解决问题我想要连接超过90天的客户的数据给我一个错误“DATE”不是一个可识别的内置函数名。@shonny现在检查是否仍然会出现相同的错误。我使用的是dbeaver-mysql服务器

select customerno,DATEDIFF( date(now()), date(date_connected)) as days_connected from 
    ( 
    select ch.customerno, min(ch.connectiondatetime) as date_connected 
    from ConnectionHistory ch    
    GROUP by customerno 
  having DATEDIFF(date(now()),date(date_connected))>90

    ) as T