sql - Query results in empty result -


i trying following query

`select  skillmgt.*, competences.competence_description  skillmgt  inner join competences  on skillmgt.eid=competences.competence_id  eid=121 , datename(yyyy,timestamp)=2013`

the query runs successfully, returns no results although have eid's equal competence_id's , where clause true

actually,even without where clause not work!

edit: solved doing:

 select skillmgt.*,competences.* competences  join skillmgt  on competences.competence_id=skillmgt.cid  skillmgt.eid=121 , datename(yyyy,skillmgt.timestamp)='2013'

datename returns string. depending on sql flavor, should try

select  skillmgt.*, competences.competence_description  skillmgt  inner join competences  on skillmgt.eid=competences.competence_id  eid=121 , datename(yyyy,timestamp)="2013"

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