最简单的写法

 sql := 'select "|||" + NAME + "|||" + TITLE + "|||" + CONSTR + "|||" as d from table1 where d like "%' +  edit1.Text  + '%"';

SQLStr := 'SELECT * FROM table ' +
'WHERE ' +
'NAME LIKE ''%' + edit1.Text + '%'' ' +
'OR ' +
'TITLE LIKE ''%' + edit1.Text + '%'' ' +
'OR '+
'CONSTR LIKE ''%' + edit1.Text + '%''';