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delete from X where a=:a
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delete from Y where a=:a
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delete from Z where a=:a
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adoquery1.SQL.Add('delete from a where a=''1''');
adoquery1.SQL.Add('delete from a where a=''2''');
adoquery1.SQL.Add('delete from a where a=''3''');
ADOQuery1.ExecSQL;
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with adoquery1 do begin
close;sql.clear;
sql.add('delete from
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