php - Instruction conditional if to checked double records -


this question has answer here:

i have table: enter image description here

how can write instruction if, check records stored @ same time (in table column created_at). example:

if(created_at record key(it's column)='stan' same created_at key='stan_key' {     return records key='stan' }

several options this. here's version using exists:

select *  yourtable y1 y1.key = 'stan' , exists (     select 1     yourtable y2     y2.key = 'stan_key' , y1.created_at = y2.created_at)

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