判断数据库是否存在
if exists (select * from sys.databases where name = \'数据库名\')
drop database [数据库名]
判断表是否存在
if exists (select * from sysobjects where id = object_id(N\'[表名]\') and OBJECTPROPERTY(id, N\'IsUserTable\') = 1)
drop table [表名]
判断存储过程是否存在
if exists (select * from sysobjects where id = object_id(N\'[存储过程名]\') and OBJECTPROPERTY(id, N\'IsProcedure\') = 1)
drop procedure [存储过程名]
判断函数是否存在
IF OBJECT_ID (N\'函数名\') IS NOT NULL
DROP FUNCTION dnt_split
判断数据库是否开启了全文搜索
select databaseproperty(\'数据库名\',\'isfulltextenabled\')
判断全文目录是否存在
select * from sysfulltextcatalogs where name =\'全文目录名称\'
文章源自：烈火网，原文：http://www.veryhuo.com/a/view/12445.html