Equijoin between two relations is one of the basic operations in relational database and a large volume of research have been devoted to it. However, in recent years, there hasn't been a survey which objectively compares a wide spectrum of various join techniques in their relative performances. This survey compares performance and practicality between various join techniques. Main criteria for ...

background: longer survival after the total repair of the tetralogy of fallot increases the importance of late complications such as right ventricular dysfunction. this is a prospective study of the right ventricular function in totally corrected tetralogy of fallot patients versus healthy children. methods: thirty-two healthy children were prospectively compared with 30 totally corrected tetra...