calculation for previous day - mysql

Question

I have these four tables - Met_Work, Reference_work, Track_work and Ref_station. In my track_work table, the column names Created and completed are blank. I want to populate data into the created column in the track_work table using some columns from the three other tables.
I need to make a calculation that will populate data into the track_work "created column" based on how many orders were created in the previous day. The calculation should involve ("created from met_work", "station_name from ref_station", and "priority and work unit from reference_work".
I wrote a query below but it needs work -
SELECT created FROM MET_WORK
WHERE created count(if(DATEADD(day, -1, GETDATE())
SELECT TRACK_WORK.created, MET_WORK.created, REFERENCE_WORK.priority, REFERENCE_WORK.work_unit
JOIN MET_WORK ON MET_WORK.created = past_day.created
JOIN REFERENCE_WORK ON MET_WORK.priority = REFERENCE_WORK.priority AND MET_WORK.work_unit = REFERENCE_WORK.work_unit enter code here
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