我在进行一个数据库查询时出现错误,出现下面提示,请哪位懂得老师帮我解决下,万分感谢!!!
[Err] ERROR: operator does not exist: integer = character varying
LINE 87: on ie.icustay_id = labs.icustay_id
^
HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.