SQL优化技术和ASE Tuning手册中的SQL优化内容,结合实际应用,采用多种算法进行比较,以获得消耗资源最少、效率最高的方法。(SQL optimization technology and SQL optimization content in ASE Tuning Handbook, combined with practical applications, we use a variety of algorithms to compare, in order to get the least consumption and the most efficient method.)