Answer by Thorsten Kettner for Select customer who don't have data on sub tables
Don't join. If you want to know whether a notification exists, use an EXISTS or IN clause.SELECT customer_id, customer_token, customer_name, expiry_date, DATE_FORMAT(EXPIRY_DATE - INTERVAL 2 MONTH,...
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Select customer who don't have data on sub tables
I am having customer data table is as below:And also sub data table is as below:Now i m trying out to access the data which is not available in sub data tableFor exampleI want customer as per below...
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