Forms Data Controls :: Compare Value From Two Tables?

Apr 5, 2010

I have a Grid View and show data from my sql database table1 ,when click on link button then genrate a pop up box nd data show in any control like detail view bt col_id show in textbox .

I have two tables

table1,table2

firt table fields are id,name,add,status,

second table fields r id,name add,status ,new staus,

whn i click on link button data comes from table2 if exists this record otherwise comes from table1 .

how to compare id from both tables .

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