摘要： SQL if exists总是出现语法错误。望高手纠正。_百度知道 http://zhidao.baidu.com/link?url=7VyzcX0V1A3lhBQ1emNt2sTk7QGDuijOqRsSxc1ML7owhy5utaaRIUYBtGG8hRmf8HaSlIgRKsEvkI3Tqc9guqIF EXISTS ( SELECT name FROM sys.databases WHERE name = 'ttt' )DROP DATABASE ttt;或者IF EXISTS ( SELECT name FROM sys.databases WHERE name = 阅读全文